./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe001_power.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/safe001_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe001_power.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 18:46:18,964 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:46:19,026 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:46:19,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:46:19,031 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:46:19,054 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:46:19,054 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:46:19,054 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:46:19,055 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:46:19,059 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:46:19,059 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:46:19,059 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:46:19,060 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:46:19,061 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:46:19,061 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:46:19,061 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:46:19,062 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:46:19,062 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:46:19,062 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:46:19,062 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:46:19,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:46:19,062 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:46:19,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:46:19,063 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:46:19,063 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:46:19,063 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:46:19,063 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:46:19,063 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:46:19,064 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:46:19,064 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:46:19,065 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:46:19,065 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:46:19,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:46:19,065 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:46:19,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:46:19,065 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:46:19,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:46:19,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:46:19,066 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:46:19,066 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:46:19,066 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:46:19,066 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:46:19,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:46:19,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:46:19,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:46:19,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:46:19,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:46:19,312 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:46:19,312 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:46:19,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe001_power.oepc.yml/witness.yml [2024-06-27 18:46:19,462 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:46:19,463 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:46:19,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-27 18:46:20,480 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:46:20,642 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:46:20,643 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-27 18:46:20,653 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8c650a6/8a39149dda3c47789a6880eacb74d793/FLAGf66e24cee [2024-06-27 18:46:20,665 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8c650a6/8a39149dda3c47789a6880eacb74d793 [2024-06-27 18:46:20,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:46:20,666 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:46:20,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:46:20,667 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:46:20,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:46:20,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:46:19" (1/2) ... [2024-06-27 18:46:20,672 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5f026d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:46:20, skipping insertion in model container [2024-06-27 18:46:20,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:46:19" (1/2) ... [2024-06-27 18:46:20,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43e20e01 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:46:20, skipping insertion in model container [2024-06-27 18:46:20,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:46:20" (2/2) ... [2024-06-27 18:46:20,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5f026d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:20, skipping insertion in model container [2024-06-27 18:46:20,674 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:46:20" (2/2) ... [2024-06-27 18:46:20,674 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:46:20,819 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:46:20,820 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:46:20,820 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:46:20,820 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:46:20,820 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:46:20,820 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-27 18:46:20,871 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:46:21,021 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/safe001_power.oepc.i[995,1008] [2024-06-27 18:46:21,220 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:46:21,235 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:46:21,263 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/safe001_power.oepc.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:46:21,356 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:46:21,394 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:46:21,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21 WrapperNode [2024-06-27 18:46:21,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:46:21,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:46:21,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:46:21,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:46:21,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,425 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,456 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 226 [2024-06-27 18:46:21,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:46:21,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:46:21,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:46:21,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:46:21,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,478 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,510 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-27 18:46:21,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,535 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:46:21,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:46:21,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:46:21,557 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:46:21,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (1/1) ... [2024-06-27 18:46:21,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:46:21,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:46:21,583 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 18:46:21,599 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 18:46:21,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:46:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:46:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:46:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:46:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:46:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:46:21,611 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:46:21,612 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:46:21,612 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:46:21,612 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:46:21,612 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:46:21,612 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:46:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:46:21,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:46:21,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:46:21,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:46:21,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:46:21,616 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 18:46:21,768 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:46:21,770 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:46:22,345 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:46:22,345 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:46:22,778 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:46:22,778 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:46:22,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:46:22 BoogieIcfgContainer [2024-06-27 18:46:22,778 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:46:22,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:46:22,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:46:22,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:46:22,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:46:19" (1/4) ... [2024-06-27 18:46:22,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4b277a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:46:22, skipping insertion in model container [2024-06-27 18:46:22,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:46:20" (2/4) ... [2024-06-27 18:46:22,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4b277a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:46:22, skipping insertion in model container [2024-06-27 18:46:22,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:46:21" (3/4) ... [2024-06-27 18:46:22,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f4b277a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:46:22, skipping insertion in model container [2024-06-27 18:46:22,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:46:22" (4/4) ... [2024-06-27 18:46:22,786 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.oepc.i [2024-06-27 18:46:22,801 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:46:22,801 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:46:22,801 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:46:22,861 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:46:22,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:46:22,920 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:46:22,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:46:22,925 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 57 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 18:46:22,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:46:22,928 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:46:22,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:46:22,946 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;@5eb2d89e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:46:22,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:46:22,952 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:46:22,953 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 18:46:22,953 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:46:22,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:22,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:46:22,954 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 18:46:22,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash 888960332, now seen corresponding path program 1 times [2024-06-27 18:46:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:22,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37855981] [2024-06-27 18:46:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:22,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:46:24,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37855981] [2024-06-27 18:46:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37855981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:24,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:24,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:46:24,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791308090] [2024-06-27 18:46:24,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:24,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:46:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:46:24,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:46:24,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:24,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:24,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:24,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:24,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:25,767 INFO L124 PetriNetUnfolderBase]: 4073/6249 cut-off events. [2024-06-27 18:46:25,767 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 18:46:25,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12191 conditions, 6249 events. 4073/6249 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 35957 event pairs, 2411 based on Foata normal form. 0/6034 useless extension candidates. Maximal degree in co-relation 12179. Up to 5840 conditions per place. [2024-06-27 18:46:25,800 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 18:46:25,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 237 flow [2024-06-27 18:46:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:46:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:46:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-06-27 18:46:25,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2024-06-27 18:46:25,811 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 88 transitions. [2024-06-27 18:46:25,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 237 flow [2024-06-27 18:46:25,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 232 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:46:25,819 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:46:25,820 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 18:46:25,823 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:46:25,823 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:46:25,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:25,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:25,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:25,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:46:25,824 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 18:46:25,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:25,825 INFO L85 PathProgramCache]: Analyzing trace with hash -407566453, now seen corresponding path program 1 times [2024-06-27 18:46:25,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:25,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283334158] [2024-06-27 18:46:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:25,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:28,090 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 18:46:28,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:28,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283334158] [2024-06-27 18:46:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283334158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:28,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:28,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:46:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196150370] [2024-06-27 18:46:28,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:28,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:46:28,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:46:28,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:46:28,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:28,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:28,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:28,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:28,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:29,244 INFO L124 PetriNetUnfolderBase]: 4064/5956 cut-off events. [2024-06-27 18:46:29,245 INFO L125 PetriNetUnfolderBase]: For 948/948 co-relation queries the response was YES. [2024-06-27 18:46:29,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13228 conditions, 5956 events. 4064/5956 cut-off events. For 948/948 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 32452 event pairs, 1754 based on Foata normal form. 4/5957 useless extension candidates. Maximal degree in co-relation 13216. Up to 5767 conditions per place. [2024-06-27 18:46:29,270 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 65 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-27 18:46:29,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 369 flow [2024-06-27 18:46:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:46:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:46:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-27 18:46:29,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2024-06-27 18:46:29,274 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 119 transitions. [2024-06-27 18:46:29,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 369 flow [2024-06-27 18:46:29,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:46:29,277 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:46:29,279 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 18:46:29,280 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:46:29,280 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:46:29,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:29,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:29,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:29,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:46:29,285 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 18:46:29,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash 250343356, now seen corresponding path program 1 times [2024-06-27 18:46:29,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:29,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156482560] [2024-06-27 18:46:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:29,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:31,348 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 18:46:31,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:31,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156482560] [2024-06-27 18:46:31,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156482560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:31,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:31,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:46:31,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832468927] [2024-06-27 18:46:31,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:31,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:46:31,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:31,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:46:31,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:46:31,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:31,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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 18:46:31,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:31,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:31,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:32,738 INFO L124 PetriNetUnfolderBase]: 4114/6001 cut-off events. [2024-06-27 18:46:32,738 INFO L125 PetriNetUnfolderBase]: For 3212/3212 co-relation queries the response was YES. [2024-06-27 18:46:32,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14885 conditions, 6001 events. 4114/6001 cut-off events. For 3212/3212 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 32726 event pairs, 1206 based on Foata normal form. 7/6004 useless extension candidates. Maximal degree in co-relation 14870. Up to 5559 conditions per place. [2024-06-27 18:46:32,769 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 89 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2024-06-27 18:46:32,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 114 transitions, 584 flow [2024-06-27 18:46:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:46:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:46:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-27 18:46:32,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6680851063829787 [2024-06-27 18:46:32,774 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 5 states and 157 transitions. [2024-06-27 18:46:32,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 114 transitions, 584 flow [2024-06-27 18:46:32,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 114 transitions, 584 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:46:32,783 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 310 flow [2024-06-27 18:46:32,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-27 18:46:32,784 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2024-06-27 18:46:32,784 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 310 flow [2024-06-27 18:46:32,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 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 18:46:32,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:32,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:32,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:46:32,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:46:32,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash 61845915, now seen corresponding path program 1 times [2024-06-27 18:46:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:32,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589317371] [2024-06-27 18:46:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:32,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:35,175 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 18:46:35,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:35,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589317371] [2024-06-27 18:46:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589317371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:35,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:35,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:46:35,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19755638] [2024-06-27 18:46:35,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:35,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:46:35,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:35,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:46:35,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:46:35,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:46:35,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:35,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:35,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:46:35,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:36,623 INFO L124 PetriNetUnfolderBase]: 4195/6120 cut-off events. [2024-06-27 18:46:36,624 INFO L125 PetriNetUnfolderBase]: For 7073/7073 co-relation queries the response was YES. [2024-06-27 18:46:36,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17655 conditions, 6120 events. 4195/6120 cut-off events. For 7073/7073 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 33607 event pairs, 791 based on Foata normal form. 14/6130 useless extension candidates. Maximal degree in co-relation 17635. Up to 5470 conditions per place. [2024-06-27 18:46:36,647 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 101 selfloop transitions, 21 changer transitions 0/129 dead transitions. [2024-06-27 18:46:36,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 129 transitions, 742 flow [2024-06-27 18:46:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:46:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:46:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-27 18:46:36,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-06-27 18:46:36,649 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 310 flow. Second operand 6 states and 183 transitions. [2024-06-27 18:46:36,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 129 transitions, 742 flow [2024-06-27 18:46:36,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 129 transitions, 736 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 18:46:36,660 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 372 flow [2024-06-27 18:46:36,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-27 18:46:36,660 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-06-27 18:46:36,661 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 372 flow [2024-06-27 18:46:36,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:36,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:36,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:36,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:46:36,661 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 18:46:36,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:36,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1296600283, now seen corresponding path program 1 times [2024-06-27 18:46:36,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:36,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066238903] [2024-06-27 18:46:36,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:36,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:37,852 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 18:46:37,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:37,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066238903] [2024-06-27 18:46:37,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066238903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:37,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:37,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:46:37,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317161241] [2024-06-27 18:46:37,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:37,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:46:37,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:46:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:46:37,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:37,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 372 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:37,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:37,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:37,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:39,153 INFO L124 PetriNetUnfolderBase]: 4187/6444 cut-off events. [2024-06-27 18:46:39,154 INFO L125 PetriNetUnfolderBase]: For 9054/9054 co-relation queries the response was YES. [2024-06-27 18:46:39,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18961 conditions, 6444 events. 4187/6444 cut-off events. For 9054/9054 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 37416 event pairs, 1471 based on Foata normal form. 3/6444 useless extension candidates. Maximal degree in co-relation 18937. Up to 5968 conditions per place. [2024-06-27 18:46:39,189 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 76 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-06-27 18:46:39,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 632 flow [2024-06-27 18:46:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:46:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:46:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 18:46:39,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502127659574468 [2024-06-27 18:46:39,191 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 372 flow. Second operand 5 states and 118 transitions. [2024-06-27 18:46:39,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 632 flow [2024-06-27 18:46:39,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 578 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 18:46:39,216 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 389 flow [2024-06-27 18:46:39,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 18:46:39,218 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-27 18:46:39,218 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 389 flow [2024-06-27 18:46:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:39,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:39,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:39,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:46:39,219 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 18:46:39,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1580523152, now seen corresponding path program 1 times [2024-06-27 18:46:39,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:39,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070174729] [2024-06-27 18:46:39,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:39,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:40,833 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 18:46:40,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:40,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070174729] [2024-06-27 18:46:40,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070174729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:40,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:40,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:46:40,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286205849] [2024-06-27 18:46:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:40,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:46:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:46:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:46:40,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:40,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:40,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:40,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:40,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:42,392 INFO L124 PetriNetUnfolderBase]: 4177/6410 cut-off events. [2024-06-27 18:46:42,393 INFO L125 PetriNetUnfolderBase]: For 9823/9823 co-relation queries the response was YES. [2024-06-27 18:46:42,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18799 conditions, 6410 events. 4177/6410 cut-off events. For 9823/9823 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 36535 event pairs, 1618 based on Foata normal form. 4/6411 useless extension candidates. Maximal degree in co-relation 18773. Up to 5944 conditions per place. [2024-06-27 18:46:42,419 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-27 18:46:42,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 751 flow [2024-06-27 18:46:42,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:46:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:46:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 18:46:42,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-06-27 18:46:42,421 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 389 flow. Second operand 6 states and 140 transitions. [2024-06-27 18:46:42,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 751 flow [2024-06-27 18:46:42,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 112 transitions, 712 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 18:46:42,429 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 495 flow [2024-06-27 18:46:42,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=495, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-06-27 18:46:42,430 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2024-06-27 18:46:42,430 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 495 flow [2024-06-27 18:46:42,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:42,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:42,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:42,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:46:42,431 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 18:46:42,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash -532743604, now seen corresponding path program 1 times [2024-06-27 18:46:42,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:42,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975905843] [2024-06-27 18:46:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:42,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:44,601 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 18:46:44,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:44,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975905843] [2024-06-27 18:46:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975905843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:44,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:44,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:46:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822653202] [2024-06-27 18:46:44,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:46:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:46:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:46:44,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:44,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 495 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:44,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:44,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:44,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:46,140 INFO L124 PetriNetUnfolderBase]: 4223/6198 cut-off events. [2024-06-27 18:46:46,140 INFO L125 PetriNetUnfolderBase]: For 12331/12334 co-relation queries the response was YES. [2024-06-27 18:46:46,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20082 conditions, 6198 events. 4223/6198 cut-off events. For 12331/12334 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 34016 event pairs, 1184 based on Foata normal form. 8/6202 useless extension candidates. Maximal degree in co-relation 20053. Up to 5681 conditions per place. [2024-06-27 18:46:46,168 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 95 selfloop transitions, 27 changer transitions 0/128 dead transitions. [2024-06-27 18:46:46,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 903 flow [2024-06-27 18:46:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:46:46,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:46:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 18:46:46,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549645390070922 [2024-06-27 18:46:46,170 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 495 flow. Second operand 6 states and 155 transitions. [2024-06-27 18:46:46,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 903 flow [2024-06-27 18:46:46,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 893 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 18:46:46,180 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 573 flow [2024-06-27 18:46:46,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=573, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-27 18:46:46,180 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2024-06-27 18:46:46,180 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 573 flow [2024-06-27 18:46:46,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:46,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:46,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:46,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:46:46,181 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 18:46:46,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:46,181 INFO L85 PathProgramCache]: Analyzing trace with hash -492318364, now seen corresponding path program 2 times [2024-06-27 18:46:46,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:46,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814847979] [2024-06-27 18:46:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:46,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:47,911 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 18:46:47,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814847979] [2024-06-27 18:46:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814847979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:47,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:47,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:46:47,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796121154] [2024-06-27 18:46:47,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:47,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:46:47,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:47,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:46:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:46:47,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:47,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 573 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:47,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:47,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:47,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:49,442 INFO L124 PetriNetUnfolderBase]: 4203/6148 cut-off events. [2024-06-27 18:46:49,443 INFO L125 PetriNetUnfolderBase]: For 14321/14321 co-relation queries the response was YES. [2024-06-27 18:46:49,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 6148 events. 4203/6148 cut-off events. For 14321/14321 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 33540 event pairs, 1218 based on Foata normal form. 3/6142 useless extension candidates. Maximal degree in co-relation 20488. Up to 5657 conditions per place. [2024-06-27 18:46:49,468 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 89 selfloop transitions, 28 changer transitions 0/123 dead transitions. [2024-06-27 18:46:49,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 123 transitions, 919 flow [2024-06-27 18:46:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:46:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:46:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 18:46:49,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:46:49,470 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 573 flow. Second operand 6 states and 150 transitions. [2024-06-27 18:46:49,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 123 transitions, 919 flow [2024-06-27 18:46:49,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 123 transitions, 882 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 18:46:49,482 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 602 flow [2024-06-27 18:46:49,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=602, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-27 18:46:49,482 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-27 18:46:49,482 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 602 flow [2024-06-27 18:46:49,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:46:49,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:49,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:49,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:46:49,483 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 18:46:49,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:49,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1434277039, now seen corresponding path program 1 times [2024-06-27 18:46:49,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:49,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159017076] [2024-06-27 18:46:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:49,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:51,163 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 18:46:51,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:51,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159017076] [2024-06-27 18:46:51,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159017076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:51,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:51,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:46:51,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633911428] [2024-06-27 18:46:51,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:51,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:46:51,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:46:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:46:51,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:51,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 602 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 18:46:51,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:51,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:51,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:53,770 INFO L124 PetriNetUnfolderBase]: 6671/9716 cut-off events. [2024-06-27 18:46:53,770 INFO L125 PetriNetUnfolderBase]: For 25260/25263 co-relation queries the response was YES. [2024-06-27 18:46:53,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32712 conditions, 9716 events. 6671/9716 cut-off events. For 25260/25263 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 54647 event pairs, 1368 based on Foata normal form. 22/9734 useless extension candidates. Maximal degree in co-relation 32679. Up to 6662 conditions per place. [2024-06-27 18:46:53,819 INFO L140 encePairwiseOnDemand]: 30/47 looper letters, 164 selfloop transitions, 68 changer transitions 0/238 dead transitions. [2024-06-27 18:46:53,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 238 transitions, 1770 flow [2024-06-27 18:46:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:46:53,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:46:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-06-27 18:46:53,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841392649903289 [2024-06-27 18:46:53,821 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 602 flow. Second operand 11 states and 302 transitions. [2024-06-27 18:46:53,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 238 transitions, 1770 flow [2024-06-27 18:46:53,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 238 transitions, 1659 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:46:53,846 INFO L231 Difference]: Finished difference. Result has 93 places, 127 transitions, 1062 flow [2024-06-27 18:46:53,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1062, PETRI_PLACES=93, PETRI_TRANSITIONS=127} [2024-06-27 18:46:53,847 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 42 predicate places. [2024-06-27 18:46:53,847 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 127 transitions, 1062 flow [2024-06-27 18:46:53,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 18:46:53,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:53,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:53,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:46:53,848 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 18:46:53,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1717632827, now seen corresponding path program 2 times [2024-06-27 18:46:53,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174629903] [2024-06-27 18:46:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:46:56,159 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 18:46:56,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:46:56,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174629903] [2024-06-27 18:46:56,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174629903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:46:56,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:46:56,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:46:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184221078] [2024-06-27 18:46:56,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:46:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:46:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:46:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:46:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:46:56,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:46:56,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 127 transitions, 1062 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 18:46:56,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:46:56,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:46:56,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:46:58,629 INFO L124 PetriNetUnfolderBase]: 8111/11724 cut-off events. [2024-06-27 18:46:58,630 INFO L125 PetriNetUnfolderBase]: For 50038/50043 co-relation queries the response was YES. [2024-06-27 18:46:58,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49203 conditions, 11724 events. 8111/11724 cut-off events. For 50038/50043 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 66587 event pairs, 1438 based on Foata normal form. 38/11758 useless extension candidates. Maximal degree in co-relation 49163. Up to 7438 conditions per place. [2024-06-27 18:46:58,693 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 140 selfloop transitions, 89 changer transitions 0/235 dead transitions. [2024-06-27 18:46:58,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 235 transitions, 2086 flow [2024-06-27 18:46:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:46:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:46:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 18:46:58,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-27 18:46:58,695 INFO L175 Difference]: Start difference. First operand has 93 places, 127 transitions, 1062 flow. Second operand 9 states and 240 transitions. [2024-06-27 18:46:58,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 235 transitions, 2086 flow [2024-06-27 18:46:58,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 235 transitions, 2032 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 18:46:58,764 INFO L231 Difference]: Finished difference. Result has 102 places, 150 transitions, 1459 flow [2024-06-27 18:46:58,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1459, PETRI_PLACES=102, PETRI_TRANSITIONS=150} [2024-06-27 18:46:58,765 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 51 predicate places. [2024-06-27 18:46:58,765 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 150 transitions, 1459 flow [2024-06-27 18:46:58,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 18:46:58,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:46:58,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:46:58,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:46:58,766 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 18:46:58,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:46:58,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1918238477, now seen corresponding path program 3 times [2024-06-27 18:46:58,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:46:58,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696562458] [2024-06-27 18:46:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:46:58,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:46:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:00,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:00,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696562458] [2024-06-27 18:47:00,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696562458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:00,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:00,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:47:00,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951094210] [2024-06-27 18:47:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:00,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:47:00,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:00,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:47:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:47:00,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:00,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 150 transitions, 1459 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 18:47:00,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:00,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:00,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:03,285 INFO L124 PetriNetUnfolderBase]: 8121/11579 cut-off events. [2024-06-27 18:47:03,285 INFO L125 PetriNetUnfolderBase]: For 67478/67480 co-relation queries the response was YES. [2024-06-27 18:47:03,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56026 conditions, 11579 events. 8121/11579 cut-off events. For 67478/67480 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 63322 event pairs, 1563 based on Foata normal form. 4/11565 useless extension candidates. Maximal degree in co-relation 55982. Up to 10248 conditions per place. [2024-06-27 18:47:03,356 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 202 selfloop transitions, 61 changer transitions 0/269 dead transitions. [2024-06-27 18:47:03,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 269 transitions, 2962 flow [2024-06-27 18:47:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:47:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:47:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 18:47:03,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501519756838906 [2024-06-27 18:47:03,358 INFO L175 Difference]: Start difference. First operand has 102 places, 150 transitions, 1459 flow. Second operand 7 states and 181 transitions. [2024-06-27 18:47:03,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 269 transitions, 2962 flow [2024-06-27 18:47:03,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 269 transitions, 2733 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 18:47:03,550 INFO L231 Difference]: Finished difference. Result has 107 places, 197 transitions, 2046 flow [2024-06-27 18:47:03,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=107, PETRI_TRANSITIONS=197} [2024-06-27 18:47:03,551 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 56 predicate places. [2024-06-27 18:47:03,551 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 197 transitions, 2046 flow [2024-06-27 18:47:03,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 18:47:03,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:03,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:03,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:47:03,551 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 18:47:03,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:03,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1535474321, now seen corresponding path program 4 times [2024-06-27 18:47:03,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:03,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856520525] [2024-06-27 18:47:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:03,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:05,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856520525] [2024-06-27 18:47:05,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856520525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:05,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:05,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:47:05,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198251065] [2024-06-27 18:47:05,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:05,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:47:05,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:47:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:47:05,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:05,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 197 transitions, 2046 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 18:47:05,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:05,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:05,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:08,213 INFO L124 PetriNetUnfolderBase]: 8293/11828 cut-off events. [2024-06-27 18:47:08,213 INFO L125 PetriNetUnfolderBase]: For 78343/78345 co-relation queries the response was YES. [2024-06-27 18:47:08,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58507 conditions, 11828 events. 8293/11828 cut-off events. For 78343/78345 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 65228 event pairs, 1748 based on Foata normal form. 18/11832 useless extension candidates. Maximal degree in co-relation 58459. Up to 10371 conditions per place. [2024-06-27 18:47:08,282 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 190 selfloop transitions, 83 changer transitions 0/279 dead transitions. [2024-06-27 18:47:08,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 279 transitions, 3074 flow [2024-06-27 18:47:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:47:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:47:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:47:08,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-27 18:47:08,284 INFO L175 Difference]: Start difference. First operand has 107 places, 197 transitions, 2046 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:47:08,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 279 transitions, 3074 flow [2024-06-27 18:47:08,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 279 transitions, 3038 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 18:47:08,463 INFO L231 Difference]: Finished difference. Result has 115 places, 214 transitions, 2427 flow [2024-06-27 18:47:08,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2427, PETRI_PLACES=115, PETRI_TRANSITIONS=214} [2024-06-27 18:47:08,464 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-27 18:47:08,464 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 214 transitions, 2427 flow [2024-06-27 18:47:08,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 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 18:47:08,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:08,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:08,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:47:08,465 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 18:47:08,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1535720399, now seen corresponding path program 1 times [2024-06-27 18:47:08,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:08,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465617861] [2024-06-27 18:47:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:08,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:10,959 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 18:47:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:10,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465617861] [2024-06-27 18:47:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465617861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:10,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:10,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:47:10,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666488661] [2024-06-27 18:47:10,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:10,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:47:10,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:47:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:47:10,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:10,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 214 transitions, 2427 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:10,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:10,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:10,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:13,443 INFO L124 PetriNetUnfolderBase]: 8285/12242 cut-off events. [2024-06-27 18:47:13,443 INFO L125 PetriNetUnfolderBase]: For 90199/90201 co-relation queries the response was YES. [2024-06-27 18:47:13,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61457 conditions, 12242 events. 8285/12242 cut-off events. For 90199/90201 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 71115 event pairs, 2386 based on Foata normal form. 4/12243 useless extension candidates. Maximal degree in co-relation 61405. Up to 11477 conditions per place. [2024-06-27 18:47:13,526 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 236 selfloop transitions, 17 changer transitions 0/259 dead transitions. [2024-06-27 18:47:13,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 259 transitions, 3097 flow [2024-06-27 18:47:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:47:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:47:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 18:47:13,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49544072948328266 [2024-06-27 18:47:13,528 INFO L175 Difference]: Start difference. First operand has 115 places, 214 transitions, 2427 flow. Second operand 7 states and 163 transitions. [2024-06-27 18:47:13,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 259 transitions, 3097 flow [2024-06-27 18:47:13,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 259 transitions, 2905 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 18:47:13,732 INFO L231 Difference]: Finished difference. Result has 117 places, 217 transitions, 2319 flow [2024-06-27 18:47:13,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2319, PETRI_PLACES=117, PETRI_TRANSITIONS=217} [2024-06-27 18:47:13,733 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-27 18:47:13,733 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 217 transitions, 2319 flow [2024-06-27 18:47:13,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:13,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:13,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:13,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:47:13,734 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 18:47:13,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash -415997920, now seen corresponding path program 1 times [2024-06-27 18:47:13,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:13,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870127539] [2024-06-27 18:47:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:13,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:15,900 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 18:47:15,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:15,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870127539] [2024-06-27 18:47:15,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870127539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:15,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:15,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:47:15,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106651551] [2024-06-27 18:47:15,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:15,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:47:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:47:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:47:15,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:15,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 217 transitions, 2319 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:15,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:15,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:15,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:18,606 INFO L124 PetriNetUnfolderBase]: 8701/12520 cut-off events. [2024-06-27 18:47:18,606 INFO L125 PetriNetUnfolderBase]: For 88263/88280 co-relation queries the response was YES. [2024-06-27 18:47:18,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62726 conditions, 12520 events. 8701/12520 cut-off events. For 88263/88280 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 71045 event pairs, 1737 based on Foata normal form. 36/12552 useless extension candidates. Maximal degree in co-relation 62673. Up to 7823 conditions per place. [2024-06-27 18:47:18,682 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 174 selfloop transitions, 153 changer transitions 0/333 dead transitions. [2024-06-27 18:47:18,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 333 transitions, 3713 flow [2024-06-27 18:47:18,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:47:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:47:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-06-27 18:47:18,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886524822695035 [2024-06-27 18:47:18,684 INFO L175 Difference]: Start difference. First operand has 117 places, 217 transitions, 2319 flow. Second operand 9 states and 249 transitions. [2024-06-27 18:47:18,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 333 transitions, 3713 flow [2024-06-27 18:47:18,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 333 transitions, 3655 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:47:18,850 INFO L231 Difference]: Finished difference. Result has 123 places, 240 transitions, 3001 flow [2024-06-27 18:47:18,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3001, PETRI_PLACES=123, PETRI_TRANSITIONS=240} [2024-06-27 18:47:18,850 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2024-06-27 18:47:18,850 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 240 transitions, 3001 flow [2024-06-27 18:47:18,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:18,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:18,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:18,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:47:18,851 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 18:47:18,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash -841044888, now seen corresponding path program 2 times [2024-06-27 18:47:18,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:18,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549867856] [2024-06-27 18:47:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:18,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:21,437 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 18:47:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549867856] [2024-06-27 18:47:21,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549867856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:21,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:21,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:47:21,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206075349] [2024-06-27 18:47:21,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:47:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:47:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:47:21,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:21,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 240 transitions, 3001 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:21,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:21,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:21,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:24,023 INFO L124 PetriNetUnfolderBase]: 8869/12797 cut-off events. [2024-06-27 18:47:24,023 INFO L125 PetriNetUnfolderBase]: For 115159/115172 co-relation queries the response was YES. [2024-06-27 18:47:24,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71434 conditions, 12797 events. 8869/12797 cut-off events. For 115159/115172 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 73128 event pairs, 1504 based on Foata normal form. 30/12823 useless extension candidates. Maximal degree in co-relation 71378. Up to 7953 conditions per place. [2024-06-27 18:47:24,111 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 159 selfloop transitions, 151 changer transitions 0/316 dead transitions. [2024-06-27 18:47:24,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 316 transitions, 4032 flow [2024-06-27 18:47:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:47:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:47:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:47:24,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 18:47:24,113 INFO L175 Difference]: Start difference. First operand has 123 places, 240 transitions, 3001 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:47:24,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 316 transitions, 4032 flow [2024-06-27 18:47:24,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 316 transitions, 3764 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 18:47:24,513 INFO L231 Difference]: Finished difference. Result has 126 places, 249 transitions, 3200 flow [2024-06-27 18:47:24,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3200, PETRI_PLACES=126, PETRI_TRANSITIONS=249} [2024-06-27 18:47:24,514 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 75 predicate places. [2024-06-27 18:47:24,514 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 249 transitions, 3200 flow [2024-06-27 18:47:24,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:24,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:24,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:24,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:47:24,515 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 18:47:24,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:24,515 INFO L85 PathProgramCache]: Analyzing trace with hash -664148116, now seen corresponding path program 3 times [2024-06-27 18:47:24,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:24,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067652275] [2024-06-27 18:47:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:24,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:26,706 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 18:47:26,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:26,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067652275] [2024-06-27 18:47:26,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067652275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:26,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:26,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:47:26,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828918867] [2024-06-27 18:47:26,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:26,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:47:26,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:47:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:47:26,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:26,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 249 transitions, 3200 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:26,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:26,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:26,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:29,402 INFO L124 PetriNetUnfolderBase]: 8869/12758 cut-off events. [2024-06-27 18:47:29,402 INFO L125 PetriNetUnfolderBase]: For 123357/123389 co-relation queries the response was YES. [2024-06-27 18:47:29,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72060 conditions, 12758 events. 8869/12758 cut-off events. For 123357/123389 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 71755 event pairs, 1738 based on Foata normal form. 19/12758 useless extension candidates. Maximal degree in co-relation 72003. Up to 11227 conditions per place. [2024-06-27 18:47:29,497 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 252 selfloop transitions, 61 changer transitions 0/319 dead transitions. [2024-06-27 18:47:29,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 319 transitions, 4262 flow [2024-06-27 18:47:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:47:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:47:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:47:29,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 18:47:29,498 INFO L175 Difference]: Start difference. First operand has 126 places, 249 transitions, 3200 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:47:29,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 319 transitions, 4262 flow [2024-06-27 18:47:30,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 319 transitions, 3939 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 18:47:30,013 INFO L231 Difference]: Finished difference. Result has 129 places, 255 transitions, 3140 flow [2024-06-27 18:47:30,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2913, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3140, PETRI_PLACES=129, PETRI_TRANSITIONS=255} [2024-06-27 18:47:30,014 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 78 predicate places. [2024-06-27 18:47:30,014 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 255 transitions, 3140 flow [2024-06-27 18:47:30,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:30,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:30,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:47:30,014 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 18:47:30,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2119235858, now seen corresponding path program 1 times [2024-06-27 18:47:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:30,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390320547] [2024-06-27 18:47:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:32,209 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 18:47:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:32,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390320547] [2024-06-27 18:47:32,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390320547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:32,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:32,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:47:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647577545] [2024-06-27 18:47:32,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:32,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:47:32,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:32,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:47:32,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:47:32,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:32,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 255 transitions, 3140 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:32,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:32,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:32,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:34,791 INFO L124 PetriNetUnfolderBase]: 8957/12921 cut-off events. [2024-06-27 18:47:34,791 INFO L125 PetriNetUnfolderBase]: For 122303/122316 co-relation queries the response was YES. [2024-06-27 18:47:34,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70735 conditions, 12921 events. 8957/12921 cut-off events. For 122303/122316 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 74102 event pairs, 1463 based on Foata normal form. 16/12933 useless extension candidates. Maximal degree in co-relation 70676. Up to 11302 conditions per place. [2024-06-27 18:47:34,887 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 255 selfloop transitions, 56 changer transitions 0/317 dead transitions. [2024-06-27 18:47:34,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 317 transitions, 4152 flow [2024-06-27 18:47:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:47:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:47:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:47:34,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 18:47:34,890 INFO L175 Difference]: Start difference. First operand has 129 places, 255 transitions, 3140 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:47:34,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 317 transitions, 4152 flow [2024-06-27 18:47:35,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 317 transitions, 4077 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:47:35,345 INFO L231 Difference]: Finished difference. Result has 133 places, 259 transitions, 3258 flow [2024-06-27 18:47:35,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3258, PETRI_PLACES=133, PETRI_TRANSITIONS=259} [2024-06-27 18:47:35,346 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 82 predicate places. [2024-06-27 18:47:35,346 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 259 transitions, 3258 flow [2024-06-27 18:47:35,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:35,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:35,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:35,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:47:35,347 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 18:47:35,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash -126328304, now seen corresponding path program 2 times [2024-06-27 18:47:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:35,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719407635] [2024-06-27 18:47:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:35,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:47:37,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:37,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719407635] [2024-06-27 18:47:37,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719407635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:37,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:37,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:47:37,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218543890] [2024-06-27 18:47:37,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:37,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:47:37,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:37,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:47:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:47:37,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:37,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 259 transitions, 3258 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:37,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:37,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:37,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:40,746 INFO L124 PetriNetUnfolderBase]: 8944/12937 cut-off events. [2024-06-27 18:47:40,746 INFO L125 PetriNetUnfolderBase]: For 130794/130799 co-relation queries the response was YES. [2024-06-27 18:47:40,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70956 conditions, 12937 events. 8944/12937 cut-off events. For 130794/130799 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 74156 event pairs, 1970 based on Foata normal form. 8/12941 useless extension candidates. Maximal degree in co-relation 70895. Up to 11648 conditions per place. [2024-06-27 18:47:40,833 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 247 selfloop transitions, 63 changer transitions 0/316 dead transitions. [2024-06-27 18:47:40,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 316 transitions, 4143 flow [2024-06-27 18:47:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:47:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:47:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:47:40,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541033434650456 [2024-06-27 18:47:40,837 INFO L175 Difference]: Start difference. First operand has 133 places, 259 transitions, 3258 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:47:40,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 316 transitions, 4143 flow [2024-06-27 18:47:41,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 316 transitions, 4043 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 18:47:41,251 INFO L231 Difference]: Finished difference. Result has 137 places, 259 transitions, 3296 flow [2024-06-27 18:47:41,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3296, PETRI_PLACES=137, PETRI_TRANSITIONS=259} [2024-06-27 18:47:41,251 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 86 predicate places. [2024-06-27 18:47:41,251 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 259 transitions, 3296 flow [2024-06-27 18:47:41,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:41,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:41,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:41,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:47:41,252 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 18:47:41,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash -302579536, now seen corresponding path program 1 times [2024-06-27 18:47:41,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:41,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676489560] [2024-06-27 18:47:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:41,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:44,644 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 18:47:44,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:44,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676489560] [2024-06-27 18:47:44,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676489560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:44,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:44,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805558447] [2024-06-27 18:47:44,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:44,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:44,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:44,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:44,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:44,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 259 transitions, 3296 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:44,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:44,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:44,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:47,841 INFO L124 PetriNetUnfolderBase]: 10400/15057 cut-off events. [2024-06-27 18:47:47,841 INFO L125 PetriNetUnfolderBase]: For 163031/163036 co-relation queries the response was YES. [2024-06-27 18:47:47,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80146 conditions, 15057 events. 10400/15057 cut-off events. For 163031/163036 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 88327 event pairs, 1787 based on Foata normal form. 94/15147 useless extension candidates. Maximal degree in co-relation 80083. Up to 7926 conditions per place. [2024-06-27 18:47:47,979 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 188 selfloop transitions, 168 changer transitions 0/362 dead transitions. [2024-06-27 18:47:47,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 362 transitions, 4523 flow [2024-06-27 18:47:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:47:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:47:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-27 18:47:47,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5765957446808511 [2024-06-27 18:47:47,981 INFO L175 Difference]: Start difference. First operand has 137 places, 259 transitions, 3296 flow. Second operand 10 states and 271 transitions. [2024-06-27 18:47:47,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 362 transitions, 4523 flow [2024-06-27 18:47:48,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 362 transitions, 4386 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 18:47:48,604 INFO L231 Difference]: Finished difference. Result has 141 places, 263 transitions, 3596 flow [2024-06-27 18:47:48,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3596, PETRI_PLACES=141, PETRI_TRANSITIONS=263} [2024-06-27 18:47:48,605 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-27 18:47:48,605 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 263 transitions, 3596 flow [2024-06-27 18:47:48,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:48,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:48,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:48,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:47:48,606 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 18:47:48,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash -865521894, now seen corresponding path program 2 times [2024-06-27 18:47:48,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:48,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505261080] [2024-06-27 18:47:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:48,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:51,899 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 18:47:51,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:51,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505261080] [2024-06-27 18:47:51,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505261080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:51,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:51,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:51,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701366905] [2024-06-27 18:47:51,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:51,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:51,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:51,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:51,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:51,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:51,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 263 transitions, 3596 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:51,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:51,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:51,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:47:55,239 INFO L124 PetriNetUnfolderBase]: 10450/15163 cut-off events. [2024-06-27 18:47:55,239 INFO L125 PetriNetUnfolderBase]: For 172310/172312 co-relation queries the response was YES. [2024-06-27 18:47:55,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85383 conditions, 15163 events. 10450/15163 cut-off events. For 172310/172312 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 88822 event pairs, 2153 based on Foata normal form. 4/15147 useless extension candidates. Maximal degree in co-relation 85319. Up to 13564 conditions per place. [2024-06-27 18:47:55,365 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 265 selfloop transitions, 74 changer transitions 0/345 dead transitions. [2024-06-27 18:47:55,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 345 transitions, 4738 flow [2024-06-27 18:47:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:47:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:47:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 18:47:55,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345744680851063 [2024-06-27 18:47:55,367 INFO L175 Difference]: Start difference. First operand has 141 places, 263 transitions, 3596 flow. Second operand 8 states and 201 transitions. [2024-06-27 18:47:55,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 345 transitions, 4738 flow [2024-06-27 18:47:55,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 345 transitions, 4349 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 18:47:55,952 INFO L231 Difference]: Finished difference. Result has 141 places, 265 transitions, 3422 flow [2024-06-27 18:47:55,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3422, PETRI_PLACES=141, PETRI_TRANSITIONS=265} [2024-06-27 18:47:55,953 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-27 18:47:55,953 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 265 transitions, 3422 flow [2024-06-27 18:47:55,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:55,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:47:55,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:47:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:47:55,954 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 18:47:55,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:47:55,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1877880656, now seen corresponding path program 3 times [2024-06-27 18:47:55,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:47:55,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955100324] [2024-06-27 18:47:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:47:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:47:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:47:59,028 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 18:47:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:47:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955100324] [2024-06-27 18:47:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955100324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:47:59,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:47:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:47:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687247982] [2024-06-27 18:47:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:47:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:47:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:47:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:47:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:47:59,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:47:59,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 265 transitions, 3422 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:47:59,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:47:59,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:47:59,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:02,345 INFO L124 PetriNetUnfolderBase]: 10766/15667 cut-off events. [2024-06-27 18:48:02,345 INFO L125 PetriNetUnfolderBase]: For 169125/169127 co-relation queries the response was YES. [2024-06-27 18:48:02,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84166 conditions, 15667 events. 10766/15667 cut-off events. For 169125/169127 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 92925 event pairs, 2349 based on Foata normal form. 18/15671 useless extension candidates. Maximal degree in co-relation 84101. Up to 13624 conditions per place. [2024-06-27 18:48:02,480 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 254 selfloop transitions, 89 changer transitions 0/349 dead transitions. [2024-06-27 18:48:02,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 349 transitions, 4545 flow [2024-06-27 18:48:02,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:48:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:48:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 18:48:02,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484633569739953 [2024-06-27 18:48:02,481 INFO L175 Difference]: Start difference. First operand has 141 places, 265 transitions, 3422 flow. Second operand 9 states and 232 transitions. [2024-06-27 18:48:02,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 349 transitions, 4545 flow [2024-06-27 18:48:03,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 349 transitions, 4384 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:48:03,112 INFO L231 Difference]: Finished difference. Result has 144 places, 269 transitions, 3545 flow [2024-06-27 18:48:03,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3263, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3545, PETRI_PLACES=144, PETRI_TRANSITIONS=269} [2024-06-27 18:48:03,112 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-27 18:48:03,113 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 269 transitions, 3545 flow [2024-06-27 18:48:03,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:03,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:03,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:03,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:48:03,113 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:03,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:03,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1641408626, now seen corresponding path program 4 times [2024-06-27 18:48:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:03,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079805608] [2024-06-27 18:48:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:03,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:06,111 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 18:48:06,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:06,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079805608] [2024-06-27 18:48:06,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079805608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:06,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:06,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:48:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241093915] [2024-06-27 18:48:06,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:06,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:48:06,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:06,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:48:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:48:06,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:06,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 269 transitions, 3545 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:06,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:06,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:06,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:09,440 INFO L124 PetriNetUnfolderBase]: 10802/15667 cut-off events. [2024-06-27 18:48:09,440 INFO L125 PetriNetUnfolderBase]: For 177511/177513 co-relation queries the response was YES. [2024-06-27 18:48:09,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85673 conditions, 15667 events. 10802/15667 cut-off events. For 177511/177513 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 92158 event pairs, 2084 based on Foata normal form. 4/15651 useless extension candidates. Maximal degree in co-relation 85607. Up to 13440 conditions per place. [2024-06-27 18:48:09,573 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 274 selfloop transitions, 83 changer transitions 0/363 dead transitions. [2024-06-27 18:48:09,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 363 transitions, 4881 flow [2024-06-27 18:48:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:48:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:48:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:48:09,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452127659574468 [2024-06-27 18:48:09,574 INFO L175 Difference]: Start difference. First operand has 144 places, 269 transitions, 3545 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:48:09,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 363 transitions, 4881 flow [2024-06-27 18:48:10,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 363 transitions, 4609 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 18:48:10,355 INFO L231 Difference]: Finished difference. Result has 146 places, 276 transitions, 3628 flow [2024-06-27 18:48:10,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3628, PETRI_PLACES=146, PETRI_TRANSITIONS=276} [2024-06-27 18:48:10,356 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 95 predicate places. [2024-06-27 18:48:10,356 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 276 transitions, 3628 flow [2024-06-27 18:48:10,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:48:10,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:10,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:48:10,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:48:10,356 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:48:10,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash -325554109, now seen corresponding path program 1 times [2024-06-27 18:48:10,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:10,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407155297] [2024-06-27 18:48:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:10,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:12,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:12,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407155297] [2024-06-27 18:48:12,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407155297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:12,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:12,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:48:12,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554923155] [2024-06-27 18:48:12,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:12,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:48:12,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:12,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:48:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:48:12,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:12,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 276 transitions, 3628 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 18:48:12,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:12,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:12,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:14,982 INFO L124 PetriNetUnfolderBase]: 10796/16109 cut-off events. [2024-06-27 18:48:14,982 INFO L125 PetriNetUnfolderBase]: For 181316/181318 co-relation queries the response was YES. [2024-06-27 18:48:15,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85920 conditions, 16109 events. 10796/16109 cut-off events. For 181316/181318 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 99523 event pairs, 3337 based on Foata normal form. 2/16108 useless extension candidates. Maximal degree in co-relation 85852. Up to 15230 conditions per place. [2024-06-27 18:48:15,125 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 280 selfloop transitions, 13 changer transitions 0/299 dead transitions. [2024-06-27 18:48:15,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 299 transitions, 4324 flow [2024-06-27 18:48:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:48:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:48:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-27 18:48:15,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808510638297872 [2024-06-27 18:48:15,127 INFO L175 Difference]: Start difference. First operand has 146 places, 276 transitions, 3628 flow. Second operand 5 states and 113 transitions. [2024-06-27 18:48:15,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 299 transitions, 4324 flow [2024-06-27 18:48:15,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 299 transitions, 4200 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 18:48:15,800 INFO L231 Difference]: Finished difference. Result has 147 places, 280 transitions, 3599 flow [2024-06-27 18:48:15,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3599, PETRI_PLACES=147, PETRI_TRANSITIONS=280} [2024-06-27 18:48:15,801 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 96 predicate places. [2024-06-27 18:48:15,801 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 280 transitions, 3599 flow [2024-06-27 18:48:15,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 18:48:15,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:15,802 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 18:48:15,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:48:15,802 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 18:48:15,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash 290225539, now seen corresponding path program 1 times [2024-06-27 18:48:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:15,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865517545] [2024-06-27 18:48:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:18,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:18,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865517545] [2024-06-27 18:48:18,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865517545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:18,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:18,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:48:18,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933249827] [2024-06-27 18:48:18,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:18,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:48:18,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:18,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:48:18,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:48:18,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:18,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 280 transitions, 3599 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:48:18,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:18,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:18,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:22,597 INFO L124 PetriNetUnfolderBase]: 14843/21791 cut-off events. [2024-06-27 18:48:22,597 INFO L125 PetriNetUnfolderBase]: For 300426/300439 co-relation queries the response was YES. [2024-06-27 18:48:22,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116284 conditions, 21791 events. 14843/21791 cut-off events. For 300426/300439 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 139073 event pairs, 2276 based on Foata normal form. 82/21869 useless extension candidates. Maximal degree in co-relation 116214. Up to 7587 conditions per place. [2024-06-27 18:48:22,781 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 240 selfloop transitions, 155 changer transitions 0/401 dead transitions. [2024-06-27 18:48:22,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 401 transitions, 5297 flow [2024-06-27 18:48:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:48:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:48:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 261 transitions. [2024-06-27 18:48:22,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-06-27 18:48:22,782 INFO L175 Difference]: Start difference. First operand has 147 places, 280 transitions, 3599 flow. Second operand 9 states and 261 transitions. [2024-06-27 18:48:22,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 401 transitions, 5297 flow [2024-06-27 18:48:23,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 401 transitions, 5232 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 18:48:23,633 INFO L231 Difference]: Finished difference. Result has 155 places, 294 transitions, 4245 flow [2024-06-27 18:48:23,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4245, PETRI_PLACES=155, PETRI_TRANSITIONS=294} [2024-06-27 18:48:23,634 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 104 predicate places. [2024-06-27 18:48:23,634 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 294 transitions, 4245 flow [2024-06-27 18:48:23,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:48:23,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:23,634 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 18:48:23,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:48:23,634 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 18:48:23,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash 378791299, now seen corresponding path program 2 times [2024-06-27 18:48:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331972057] [2024-06-27 18:48:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:23,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:26,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:26,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331972057] [2024-06-27 18:48:26,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331972057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:26,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:26,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:48:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760048903] [2024-06-27 18:48:26,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:48:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:26,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:48:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:48:26,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:26,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 294 transitions, 4245 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:48:26,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:26,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:26,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:31,778 INFO L124 PetriNetUnfolderBase]: 17223/25348 cut-off events. [2024-06-27 18:48:31,779 INFO L125 PetriNetUnfolderBase]: For 420686/420691 co-relation queries the response was YES. [2024-06-27 18:48:31,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141070 conditions, 25348 events. 17223/25348 cut-off events. For 420686/420691 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 166453 event pairs, 3948 based on Foata normal form. 74/25418 useless extension candidates. Maximal degree in co-relation 140997. Up to 14277 conditions per place. [2024-06-27 18:48:32,004 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 233 selfloop transitions, 173 changer transitions 0/412 dead transitions. [2024-06-27 18:48:32,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 412 transitions, 5829 flow [2024-06-27 18:48:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:48:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:48:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 282 transitions. [2024-06-27 18:48:32,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 18:48:32,005 INFO L175 Difference]: Start difference. First operand has 155 places, 294 transitions, 4245 flow. Second operand 10 states and 282 transitions. [2024-06-27 18:48:32,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 412 transitions, 5829 flow [2024-06-27 18:48:33,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 412 transitions, 5554 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-27 18:48:33,518 INFO L231 Difference]: Finished difference. Result has 163 places, 303 transitions, 4605 flow [2024-06-27 18:48:33,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4605, PETRI_PLACES=163, PETRI_TRANSITIONS=303} [2024-06-27 18:48:33,518 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 112 predicate places. [2024-06-27 18:48:33,518 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 303 transitions, 4605 flow [2024-06-27 18:48:33,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:48:33,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:33,519 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 18:48:33,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:48:33,519 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 18:48:33,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash -795755235, now seen corresponding path program 3 times [2024-06-27 18:48:33,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:33,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260737472] [2024-06-27 18:48:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:48:36,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:36,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260737472] [2024-06-27 18:48:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260737472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:36,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:36,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:48:36,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336839804] [2024-06-27 18:48:36,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:36,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:48:36,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:36,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:48:36,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:48:36,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:36,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 303 transitions, 4605 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:48:36,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:36,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:36,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:42,634 INFO L124 PetriNetUnfolderBase]: 19284/28642 cut-off events. [2024-06-27 18:48:42,634 INFO L125 PetriNetUnfolderBase]: For 487614/487631 co-relation queries the response was YES. [2024-06-27 18:48:42,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159072 conditions, 28642 events. 19284/28642 cut-off events. For 487614/487631 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 195057 event pairs, 4375 based on Foata normal form. 80/28718 useless extension candidates. Maximal degree in co-relation 158996. Up to 19045 conditions per place. [2024-06-27 18:48:42,943 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 250 selfloop transitions, 170 changer transitions 0/426 dead transitions. [2024-06-27 18:48:42,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 426 transitions, 6259 flow [2024-06-27 18:48:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:48:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:48:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 286 transitions. [2024-06-27 18:48:42,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085106382978723 [2024-06-27 18:48:42,945 INFO L175 Difference]: Start difference. First operand has 163 places, 303 transitions, 4605 flow. Second operand 10 states and 286 transitions. [2024-06-27 18:48:42,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 426 transitions, 6259 flow [2024-06-27 18:48:45,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 426 transitions, 5861 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 18:48:45,066 INFO L231 Difference]: Finished difference. Result has 167 places, 311 transitions, 4776 flow [2024-06-27 18:48:45,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4776, PETRI_PLACES=167, PETRI_TRANSITIONS=311} [2024-06-27 18:48:45,067 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 116 predicate places. [2024-06-27 18:48:45,067 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 311 transitions, 4776 flow [2024-06-27 18:48:45,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:48:45,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:45,067 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 18:48:45,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:48:45,067 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 18:48:45,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash -795607365, now seen corresponding path program 4 times [2024-06-27 18:48:45,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:45,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407640250] [2024-06-27 18:48:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:45,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:48:47,944 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 18:48:47,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:48:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407640250] [2024-06-27 18:48:47,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407640250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:48:47,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:48:47,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:48:47,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377325530] [2024-06-27 18:48:47,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:48:47,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:48:47,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:48:47,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:48:47,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:48:47,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:48:47,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 311 transitions, 4776 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:48:47,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:48:47,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:48:47,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:48:54,377 INFO L124 PetriNetUnfolderBase]: 20424/30378 cut-off events. [2024-06-27 18:48:54,377 INFO L125 PetriNetUnfolderBase]: For 502956/502973 co-relation queries the response was YES. [2024-06-27 18:48:54,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165640 conditions, 30378 events. 20424/30378 cut-off events. For 502956/502973 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 209702 event pairs, 6009 based on Foata normal form. 90/30464 useless extension candidates. Maximal degree in co-relation 165562. Up to 23608 conditions per place. [2024-06-27 18:48:54,670 INFO L140 encePairwiseOnDemand]: 33/47 looper letters, 249 selfloop transitions, 166 changer transitions 0/421 dead transitions. [2024-06-27 18:48:54,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 421 transitions, 6186 flow [2024-06-27 18:48:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:48:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:48:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 279 transitions. [2024-06-27 18:48:54,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5936170212765958 [2024-06-27 18:48:54,671 INFO L175 Difference]: Start difference. First operand has 167 places, 311 transitions, 4776 flow. Second operand 10 states and 279 transitions. [2024-06-27 18:48:54,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 421 transitions, 6186 flow [2024-06-27 18:48:57,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 421 transitions, 5888 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 18:48:57,018 INFO L231 Difference]: Finished difference. Result has 171 places, 314 transitions, 4921 flow [2024-06-27 18:48:57,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4921, PETRI_PLACES=171, PETRI_TRANSITIONS=314} [2024-06-27 18:48:57,019 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 18:48:57,019 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 314 transitions, 4921 flow [2024-06-27 18:48:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:48:57,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:48:57,019 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 18:48:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:48:57,019 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 18:48:57,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:48:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash -336639477, now seen corresponding path program 5 times [2024-06-27 18:48:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:48:57,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270009155] [2024-06-27 18:48:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:48:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:48:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:00,196 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 18:49:00,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:00,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270009155] [2024-06-27 18:49:00,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270009155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:00,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:00,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:49:00,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597511758] [2024-06-27 18:49:00,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:49:00,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:00,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:49:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:49:00,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:00,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 314 transitions, 4921 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:49:00,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:00,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:00,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:49:06,616 INFO L124 PetriNetUnfolderBase]: 21105/31402 cut-off events. [2024-06-27 18:49:06,616 INFO L125 PetriNetUnfolderBase]: For 498673/498686 co-relation queries the response was YES. [2024-06-27 18:49:06,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169181 conditions, 31402 events. 21105/31402 cut-off events. For 498673/498686 co-relation queries the response was YES. Maximal size of possible extension queue 1285. Compared 218275 event pairs, 6056 based on Foata normal form. 84/31482 useless extension candidates. Maximal degree in co-relation 169101. Up to 24655 conditions per place. [2024-06-27 18:49:06,960 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 238 selfloop transitions, 156 changer transitions 0/400 dead transitions. [2024-06-27 18:49:06,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 400 transitions, 6131 flow [2024-06-27 18:49:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:49:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:49:06,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 18:49:06,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697399527186762 [2024-06-27 18:49:06,962 INFO L175 Difference]: Start difference. First operand has 171 places, 314 transitions, 4921 flow. Second operand 9 states and 241 transitions. [2024-06-27 18:49:06,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 400 transitions, 6131 flow [2024-06-27 18:49:08,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 400 transitions, 5762 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 18:49:08,986 INFO L231 Difference]: Finished difference. Result has 172 places, 317 transitions, 4973 flow [2024-06-27 18:49:08,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4973, PETRI_PLACES=172, PETRI_TRANSITIONS=317} [2024-06-27 18:49:08,987 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 121 predicate places. [2024-06-27 18:49:08,987 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 317 transitions, 4973 flow [2024-06-27 18:49:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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 18:49:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:49:08,987 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 18:49:08,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:49:08,988 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 18:49:08,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:49:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash -336424275, now seen corresponding path program 1 times [2024-06-27 18:49:08,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:49:08,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917597759] [2024-06-27 18:49:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:49:08,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:49:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:49:12,909 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 18:49:12,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:49:12,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917597759] [2024-06-27 18:49:12,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917597759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:49:12,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:49:12,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:49:12,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451664524] [2024-06-27 18:49:12,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:49:12,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:49:12,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:49:12,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:49:12,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:49:12,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2024-06-27 18:49:12,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 317 transitions, 4973 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:49:12,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:49:12,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2024-06-27 18:49:12,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand