./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.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/safe025_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.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 19:05:25,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:05:25,130 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:05:25,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:05:25,134 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:05:25,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:05:25,156 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:05:25,156 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:05:25,157 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:05:25,160 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:05:25,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:05:25,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:05:25,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:05:25,162 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:05:25,162 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:05:25,163 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:05:25,163 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:05:25,163 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:05:25,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:05:25,164 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:05:25,164 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:05:25,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:05:25,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:05:25,165 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:05:25,165 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:05:25,165 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:05:25,165 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:05:25,166 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:05:25,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:05:25,166 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:05:25,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:05:25,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:05:25,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:05:25,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:05:25,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:05:25,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:05:25,169 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:05:25,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:05:25,169 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:05:25,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:05:25,169 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:05:25,170 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:05:25,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:05:25,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 19:05:25,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:05:25,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:05:25,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:05:25,393 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:05:25,393 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:05:25,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.yml/witness.yml [2024-06-27 19:05:25,617 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:05:25,617 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:05:25,618 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-27 19:05:26,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:05:26,800 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:05:26,800 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-27 19:05:26,815 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e9f9671/e8de0dedbd8a45ed887d986c995546d2/FLAG300d8449d [2024-06-27 19:05:26,825 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19e9f9671/e8de0dedbd8a45ed887d986c995546d2 [2024-06-27 19:05:26,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:05:26,826 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:05:26,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:05:26,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:05:26,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:05:26,831 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:05:25" (1/2) ... [2024-06-27 19:05:26,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb7440a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:05:26, skipping insertion in model container [2024-06-27 19:05:26,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:05:25" (1/2) ... [2024-06-27 19:05:26,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7bf6233b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:05:26, skipping insertion in model container [2024-06-27 19:05:26,838 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:05:26" (2/2) ... [2024-06-27 19:05:26,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fb7440a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:26, skipping insertion in model container [2024-06-27 19:05:26,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:05:26" (2/2) ... [2024-06-27 19:05:26,838 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:05:26,949 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:05:26,950 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-27 19:05:26,950 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-27 19:05:26,950 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-27 19:05:26,950 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:05:26,950 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-27 19:05:26,987 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:05:27,173 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/safe025_rmo.i[988,1001] [2024-06-27 19:05:27,322 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:05:27,330 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 19:05:27,367 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/safe025_rmo.i[988,1001] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:05:27,456 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:05:27,487 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:05:27,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27 WrapperNode [2024-06-27 19:05:27,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:05:27,489 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:05:27,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:05:27,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:05:27,494 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,536 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 223 [2024-06-27 19:05:27,537 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:05:27,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:05:27,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:05:27,537 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:05:27,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,550 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,572 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 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 19:05:27,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,589 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,612 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:05:27,613 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:05:27,613 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:05:27,613 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:05:27,614 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (1/1) ... [2024-06-27 19:05:27,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:05:27,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:05:27,647 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 19:05:27,652 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 19:05:27,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 19:05:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 19:05:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 19:05:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 19:05:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:05:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:05:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:05:27,675 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:05:27,675 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:05:27,676 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:05:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:05:27,676 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:05:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:05:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 19:05:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:05:27,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:05:27,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:05:27,678 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 19:05:27,785 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:05:27,787 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:05:28,269 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:05:28,269 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:05:28,587 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:05:28,587 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:05:28,587 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:05:28 BoogieIcfgContainer [2024-06-27 19:05:28,587 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:05:28,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:05:28,590 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:05:28,592 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:05:28,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:05:25" (1/4) ... [2024-06-27 19:05:28,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df5d346 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:05:28, skipping insertion in model container [2024-06-27 19:05:28,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:05:26" (2/4) ... [2024-06-27 19:05:28,594 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df5d346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:05:28, skipping insertion in model container [2024-06-27 19:05:28,594 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:05:27" (3/4) ... [2024-06-27 19:05:28,595 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df5d346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:05:28, skipping insertion in model container [2024-06-27 19:05:28,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:05:28" (4/4) ... [2024-06-27 19:05:28,596 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_rmo.i [2024-06-27 19:05:28,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:05:28,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 19:05:28,610 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:05:28,662 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:05:28,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 19:05:28,724 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-06-27 19:05:28,724 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:05:28,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-06-27 19:05:28,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-06-27 19:05:28,731 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 42 transitions, 93 flow [2024-06-27 19:05:28,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:05:28,750 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;@14ade293, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:05:28,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 19:05:28,755 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:05:28,756 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 19:05:28,756 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:05:28,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:28,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:05:28,757 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 19:05:28,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash 795769441, now seen corresponding path program 1 times [2024-06-27 19:05:28,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:28,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29107028] [2024-06-27 19:05:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:28,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:30,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29107028] [2024-06-27 19:05:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29107028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:30,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:30,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:05:30,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703377468] [2024-06-27 19:05:30,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:30,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:05:30,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:05:30,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:05:30,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-27 19:05:30,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:30,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:30,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-27 19:05:30,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:31,316 INFO L124 PetriNetUnfolderBase]: 3395/5430 cut-off events. [2024-06-27 19:05:31,317 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 19:05:31,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10425 conditions, 5430 events. 3395/5430 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 32407 event pairs, 2190 based on Foata normal form. 0/5245 useless extension candidates. Maximal degree in co-relation 10413. Up to 4904 conditions per place. [2024-06-27 19:05:31,349 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-27 19:05:31,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 233 flow [2024-06-27 19:05:31,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:05:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:05:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-27 19:05:31,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 19:05:31,361 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 93 flow. Second operand 3 states and 92 transitions. [2024-06-27 19:05:31,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 233 flow [2024-06-27 19:05:31,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:05:31,368 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 127 flow [2024-06-27 19:05:31,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-27 19:05:31,372 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-06-27 19:05:31,373 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 127 flow [2024-06-27 19:05:31,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:31,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:31,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:31,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:05:31,374 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 19:05:31,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:31,375 INFO L85 PathProgramCache]: Analyzing trace with hash 230403160, now seen corresponding path program 1 times [2024-06-27 19:05:31,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:31,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29310062] [2024-06-27 19:05:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:31,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:32,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29310062] [2024-06-27 19:05:32,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29310062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:32,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:32,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:05:32,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133099229] [2024-06-27 19:05:32,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:32,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:05:32,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:05:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:05:32,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:05:32,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:32,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:32,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:05:32,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:33,829 INFO L124 PetriNetUnfolderBase]: 4064/6243 cut-off events. [2024-06-27 19:05:33,829 INFO L125 PetriNetUnfolderBase]: For 946/946 co-relation queries the response was YES. [2024-06-27 19:05:33,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13500 conditions, 6243 events. 4064/6243 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 36048 event pairs, 1864 based on Foata normal form. 6/6247 useless extension candidates. Maximal degree in co-relation 13488. Up to 5783 conditions per place. [2024-06-27 19:05:33,856 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 60 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-06-27 19:05:33,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 341 flow [2024-06-27 19:05:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:05:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:05:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-27 19:05:33,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:05:33,859 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 127 flow. Second operand 4 states and 120 transitions. [2024-06-27 19:05:33,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 341 flow [2024-06-27 19:05:33,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:05:33,861 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 173 flow [2024-06-27 19:05:33,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 19:05:33,862 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-27 19:05:33,862 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 173 flow [2024-06-27 19:05:33,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:33,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:33,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:33,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:05:33,863 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 19:05:33,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:33,863 INFO L85 PathProgramCache]: Analyzing trace with hash 921303894, now seen corresponding path program 1 times [2024-06-27 19:05:33,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:33,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399773415] [2024-06-27 19:05:33,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:33,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:36,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399773415] [2024-06-27 19:05:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399773415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:36,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:36,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:05:36,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44038462] [2024-06-27 19:05:36,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:36,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:05:36,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:36,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:05:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:05:36,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:05:36,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:36,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:36,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:05:36,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:37,361 INFO L124 PetriNetUnfolderBase]: 4055/6228 cut-off events. [2024-06-27 19:05:37,361 INFO L125 PetriNetUnfolderBase]: For 2664/2664 co-relation queries the response was YES. [2024-06-27 19:05:37,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14777 conditions, 6228 events. 4055/6228 cut-off events. For 2664/2664 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 35948 event pairs, 1406 based on Foata normal form. 6/6232 useless extension candidates. Maximal degree in co-relation 14763. Up to 5714 conditions per place. [2024-06-27 19:05:37,393 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-27 19:05:37,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 514 flow [2024-06-27 19:05:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:05:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:05:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-27 19:05:37,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-27 19:05:37,399 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 173 flow. Second operand 6 states and 172 transitions. [2024-06-27 19:05:37,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 514 flow [2024-06-27 19:05:37,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 486 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 19:05:37,403 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 233 flow [2024-06-27 19:05:37,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 19:05:37,404 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-27 19:05:37,405 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 233 flow [2024-06-27 19:05:37,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:37,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:37,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:05:37,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:37,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:37,407 INFO L85 PathProgramCache]: Analyzing trace with hash -303640217, now seen corresponding path program 1 times [2024-06-27 19:05:37,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:37,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000618889] [2024-06-27 19:05:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:37,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:38,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:38,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000618889] [2024-06-27 19:05:38,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000618889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:38,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:38,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:05:38,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119057644] [2024-06-27 19:05:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:38,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:05:38,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:05:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:05:38,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:05:38,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:38,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:38,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:05:38,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:40,078 INFO L124 PetriNetUnfolderBase]: 3369/5417 cut-off events. [2024-06-27 19:05:40,079 INFO L125 PetriNetUnfolderBase]: For 4374/4374 co-relation queries the response was YES. [2024-06-27 19:05:40,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13803 conditions, 5417 events. 3369/5417 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32454 event pairs, 1315 based on Foata normal form. 2/5415 useless extension candidates. Maximal degree in co-relation 13786. Up to 4801 conditions per place. [2024-06-27 19:05:40,110 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 67 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-27 19:05:40,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 507 flow [2024-06-27 19:05:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:05:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:05:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:05:40,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 19:05:40,112 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 233 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:05:40,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 507 flow [2024-06-27 19:05:40,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 469 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:05:40,120 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 296 flow [2024-06-27 19:05:40,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-27 19:05:40,121 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-27 19:05:40,122 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 296 flow [2024-06-27 19:05:40,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:40,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:40,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:40,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:05:40,122 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 19:05:40,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:40,123 INFO L85 PathProgramCache]: Analyzing trace with hash -786863523, now seen corresponding path program 1 times [2024-06-27 19:05:40,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:40,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053036229] [2024-06-27 19:05:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:40,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:41,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:41,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053036229] [2024-06-27 19:05:41,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053036229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:41,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:41,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:05:41,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139920066] [2024-06-27 19:05:41,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:41,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:05:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:41,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:05:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:05:41,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:05:41,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:41,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:41,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:05:41,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:42,619 INFO L124 PetriNetUnfolderBase]: 3359/5401 cut-off events. [2024-06-27 19:05:42,619 INFO L125 PetriNetUnfolderBase]: For 6853/6856 co-relation queries the response was YES. [2024-06-27 19:05:42,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15039 conditions, 5401 events. 3359/5401 cut-off events. For 6853/6856 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32393 event pairs, 1309 based on Foata normal form. 6/5404 useless extension candidates. Maximal degree in co-relation 15019. Up to 4793 conditions per place. [2024-06-27 19:05:42,646 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 66 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-27 19:05:42,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 506 flow [2024-06-27 19:05:42,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:05:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:05:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:05:42,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-27 19:05:42,648 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 296 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:05:42,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 506 flow [2024-06-27 19:05:42,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 482 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 19:05:42,653 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 307 flow [2024-06-27 19:05:42,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-27 19:05:42,653 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-06-27 19:05:42,654 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 307 flow [2024-06-27 19:05:42,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:42,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:42,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:42,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:05:42,654 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 19:05:42,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 259339528, now seen corresponding path program 1 times [2024-06-27 19:05:42,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:42,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818747271] [2024-06-27 19:05:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:42,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:44,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:44,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818747271] [2024-06-27 19:05:44,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818747271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:44,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:44,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:05:44,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606644441] [2024-06-27 19:05:44,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:44,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:05:44,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:05:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:05:44,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:05:44,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:44,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:44,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:05:44,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:45,668 INFO L124 PetriNetUnfolderBase]: 4066/6255 cut-off events. [2024-06-27 19:05:45,668 INFO L125 PetriNetUnfolderBase]: For 9184/9184 co-relation queries the response was YES. [2024-06-27 19:05:45,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17885 conditions, 6255 events. 4066/6255 cut-off events. For 9184/9184 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36200 event pairs, 1467 based on Foata normal form. 2/6252 useless extension candidates. Maximal degree in co-relation 17862. Up to 5637 conditions per place. [2024-06-27 19:05:45,697 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 81 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-27 19:05:45,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 685 flow [2024-06-27 19:05:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:05:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:05:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:05:45,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-06-27 19:05:45,699 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 307 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:05:45,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 685 flow [2024-06-27 19:05:45,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 666 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:05:45,705 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 423 flow [2024-06-27 19:05:45,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-27 19:05:45,706 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-06-27 19:05:45,706 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 423 flow [2024-06-27 19:05:45,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:45,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:45,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:45,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:05:45,707 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 19:05:45,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1376768008, now seen corresponding path program 2 times [2024-06-27 19:05:45,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:45,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912475071] [2024-06-27 19:05:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:45,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912475071] [2024-06-27 19:05:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912475071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:47,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:47,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:05:47,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025597260] [2024-06-27 19:05:47,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:47,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:05:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:05:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:05:47,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:05:47,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:47,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:47,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:05:47,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:48,724 INFO L124 PetriNetUnfolderBase]: 4061/6237 cut-off events. [2024-06-27 19:05:48,724 INFO L125 PetriNetUnfolderBase]: For 13600/13600 co-relation queries the response was YES. [2024-06-27 19:05:48,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 6237 events. 4061/6237 cut-off events. For 13600/13600 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36063 event pairs, 1483 based on Foata normal form. 2/6230 useless extension candidates. Maximal degree in co-relation 19451. Up to 5634 conditions per place. [2024-06-27 19:05:48,750 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 75 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-27 19:05:48,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 768 flow [2024-06-27 19:05:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:05:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:05:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:05:48,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243055555555556 [2024-06-27 19:05:48,752 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 423 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:05:48,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 768 flow [2024-06-27 19:05:48,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 723 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 19:05:48,764 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 484 flow [2024-06-27 19:05:48,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-27 19:05:48,765 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-27 19:05:48,765 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 484 flow [2024-06-27 19:05:48,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:48,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:48,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:48,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:05:48,766 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 19:05:48,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:48,766 INFO L85 PathProgramCache]: Analyzing trace with hash -434213092, now seen corresponding path program 1 times [2024-06-27 19:05:48,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:48,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959082957] [2024-06-27 19:05:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:48,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:50,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:50,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959082957] [2024-06-27 19:05:50,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959082957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:50,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:50,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:05:50,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048789721] [2024-06-27 19:05:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:50,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:05:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:05:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:05:50,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:05:50,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:50,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:50,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:05:50,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:51,598 INFO L124 PetriNetUnfolderBase]: 4239/6500 cut-off events. [2024-06-27 19:05:51,598 INFO L125 PetriNetUnfolderBase]: For 16285/16287 co-relation queries the response was YES. [2024-06-27 19:05:51,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 6500 events. 4239/6500 cut-off events. For 16285/16287 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37416 event pairs, 1468 based on Foata normal form. 6/6501 useless extension candidates. Maximal degree in co-relation 21032. Up to 5772 conditions per place. [2024-06-27 19:05:51,636 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 95 selfloop transitions, 47 changer transitions 0/149 dead transitions. [2024-06-27 19:05:51,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 149 transitions, 1131 flow [2024-06-27 19:05:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:05:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:05:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 19:05:51,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-27 19:05:51,639 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 484 flow. Second operand 7 states and 188 transitions. [2024-06-27 19:05:51,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 149 transitions, 1131 flow [2024-06-27 19:05:51,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 149 transitions, 1040 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:05:51,652 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 741 flow [2024-06-27 19:05:51,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2024-06-27 19:05:51,652 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 29 predicate places. [2024-06-27 19:05:51,653 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 741 flow [2024-06-27 19:05:51,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:51,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:51,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:51,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:05:51,653 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 19:05:51,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:51,654 INFO L85 PathProgramCache]: Analyzing trace with hash -749709202, now seen corresponding path program 2 times [2024-06-27 19:05:51,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:51,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228788929] [2024-06-27 19:05:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:51,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:53,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:53,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228788929] [2024-06-27 19:05:53,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228788929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:53,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:53,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:05:53,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567544377] [2024-06-27 19:05:53,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:53,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:05:53,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:53,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:05:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:05:53,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:05:53,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 741 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:53,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:53,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:05:53,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:54,838 INFO L124 PetriNetUnfolderBase]: 4335/6654 cut-off events. [2024-06-27 19:05:54,838 INFO L125 PetriNetUnfolderBase]: For 19793/19797 co-relation queries the response was YES. [2024-06-27 19:05:54,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22468 conditions, 6654 events. 4335/6654 cut-off events. For 19793/19797 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38251 event pairs, 1483 based on Foata normal form. 10/6659 useless extension candidates. Maximal degree in co-relation 22436. Up to 5854 conditions per place. [2024-06-27 19:05:54,869 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 86 selfloop transitions, 54 changer transitions 0/147 dead transitions. [2024-06-27 19:05:54,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 147 transitions, 1267 flow [2024-06-27 19:05:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:05:54,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:05:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:05:54,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-06-27 19:05:54,871 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 741 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:05:54,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 147 transitions, 1267 flow [2024-06-27 19:05:54,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 147 transitions, 1194 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 19:05:54,885 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 896 flow [2024-06-27 19:05:54,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2024-06-27 19:05:54,886 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-06-27 19:05:54,886 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 896 flow [2024-06-27 19:05:54,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:54,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:54,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:54,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:05:54,887 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 19:05:54,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash -508062444, now seen corresponding path program 3 times [2024-06-27 19:05:54,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:54,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152846749] [2024-06-27 19:05:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:54,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:56,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:56,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152846749] [2024-06-27 19:05:56,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152846749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:56,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:56,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:05:56,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988753701] [2024-06-27 19:05:56,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:56,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:05:56,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:05:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:05:56,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:05:56,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 896 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:56,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:56,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:05:56,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:57,922 INFO L124 PetriNetUnfolderBase]: 4319/6620 cut-off events. [2024-06-27 19:05:57,922 INFO L125 PetriNetUnfolderBase]: For 22472/22490 co-relation queries the response was YES. [2024-06-27 19:05:57,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22629 conditions, 6620 events. 4319/6620 cut-off events. For 22472/22490 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38055 event pairs, 1489 based on Foata normal form. 18/6626 useless extension candidates. Maximal degree in co-relation 22596. Up to 5841 conditions per place. [2024-06-27 19:05:57,948 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 82 selfloop transitions, 53 changer transitions 0/142 dead transitions. [2024-06-27 19:05:57,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 1274 flow [2024-06-27 19:05:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:05:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:05:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:05:57,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:05:57,950 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 896 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:05:57,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 1274 flow [2024-06-27 19:05:57,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 142 transitions, 1161 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 19:05:57,967 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 902 flow [2024-06-27 19:05:57,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=902, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-27 19:05:57,968 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-27 19:05:57,968 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 902 flow [2024-06-27 19:05:57,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:57,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:57,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:57,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:05:57,969 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 19:05:57,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:57,969 INFO L85 PathProgramCache]: Analyzing trace with hash -298185430, now seen corresponding path program 1 times [2024-06-27 19:05:57,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:57,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782721691] [2024-06-27 19:05:57,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:57,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:00,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:00,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782721691] [2024-06-27 19:06:00,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782721691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:00,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:00,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:00,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18520677] [2024-06-27 19:06:00,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:00,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:00,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:06:00,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 902 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:00,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:00,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:06:00,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:01,663 INFO L124 PetriNetUnfolderBase]: 3630/5805 cut-off events. [2024-06-27 19:06:01,663 INFO L125 PetriNetUnfolderBase]: For 19676/19679 co-relation queries the response was YES. [2024-06-27 19:06:01,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19701 conditions, 5805 events. 3630/5805 cut-off events. For 19676/19679 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 34498 event pairs, 1207 based on Foata normal form. 6/5808 useless extension candidates. Maximal degree in co-relation 19668. Up to 5128 conditions per place. [2024-06-27 19:06:01,693 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 118 selfloop transitions, 16 changer transitions 0/142 dead transitions. [2024-06-27 19:06:01,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1288 flow [2024-06-27 19:06:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:06:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:06:01,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:06:01,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 19:06:01,695 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 902 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:06:01,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1288 flow [2024-06-27 19:06:01,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 142 transitions, 1061 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:06:01,710 INFO L231 Difference]: Finished difference. Result has 84 places, 109 transitions, 751 flow [2024-06-27 19:06:01,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=84, PETRI_TRANSITIONS=109} [2024-06-27 19:06:01,711 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-06-27 19:06:01,711 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 109 transitions, 751 flow [2024-06-27 19:06:01,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:01,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:01,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:01,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:06:01,712 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 19:06:01,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1007852687, now seen corresponding path program 1 times [2024-06-27 19:06:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:01,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504991055] [2024-06-27 19:06:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:03,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504991055] [2024-06-27 19:06:03,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504991055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:03,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:03,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:03,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91993137] [2024-06-27 19:06:03,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:03,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:03,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:03,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 109 transitions, 751 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:03,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:03,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:03,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:05,653 INFO L124 PetriNetUnfolderBase]: 4399/6759 cut-off events. [2024-06-27 19:06:05,654 INFO L125 PetriNetUnfolderBase]: For 23247/23247 co-relation queries the response was YES. [2024-06-27 19:06:05,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23323 conditions, 6759 events. 4399/6759 cut-off events. For 23247/23247 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 38976 event pairs, 1470 based on Foata normal form. 2/6759 useless extension candidates. Maximal degree in co-relation 23291. Up to 6156 conditions per place. [2024-06-27 19:06:05,687 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 146 selfloop transitions, 25 changer transitions 0/178 dead transitions. [2024-06-27 19:06:05,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 178 transitions, 1381 flow [2024-06-27 19:06:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:06:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:06:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:06:05,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 19:06:05,689 INFO L175 Difference]: Start difference. First operand has 84 places, 109 transitions, 751 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:06:05,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 178 transitions, 1381 flow [2024-06-27 19:06:05,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 178 transitions, 1329 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:06:05,708 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 851 flow [2024-06-27 19:06:05,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-27 19:06:05,709 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-06-27 19:06:05,709 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 851 flow [2024-06-27 19:06:05,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:05,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:05,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:05,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:06:05,710 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 19:06:05,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1770795513, now seen corresponding path program 2 times [2024-06-27 19:06:05,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:05,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460045804] [2024-06-27 19:06:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:05,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:07,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:07,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460045804] [2024-06-27 19:06:07,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460045804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:07,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:07,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:07,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968896230] [2024-06-27 19:06:07,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:07,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:07,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:07,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:07,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:07,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 851 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:07,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:07,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:07,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:09,695 INFO L124 PetriNetUnfolderBase]: 4425/6807 cut-off events. [2024-06-27 19:06:09,695 INFO L125 PetriNetUnfolderBase]: For 29778/29778 co-relation queries the response was YES. [2024-06-27 19:06:09,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24994 conditions, 6807 events. 4425/6807 cut-off events. For 29778/29778 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39374 event pairs, 1337 based on Foata normal form. 2/6804 useless extension candidates. Maximal degree in co-relation 24960. Up to 5679 conditions per place. [2024-06-27 19:06:09,723 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 105 selfloop transitions, 64 changer transitions 0/176 dead transitions. [2024-06-27 19:06:09,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 176 transitions, 1477 flow [2024-06-27 19:06:09,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:09,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:06:09,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-27 19:06:09,725 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 851 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:06:09,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 176 transitions, 1477 flow [2024-06-27 19:06:09,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 176 transitions, 1394 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:06:09,744 INFO L231 Difference]: Finished difference. Result has 91 places, 125 transitions, 1053 flow [2024-06-27 19:06:09,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=91, PETRI_TRANSITIONS=125} [2024-06-27 19:06:09,745 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-27 19:06:09,745 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 125 transitions, 1053 flow [2024-06-27 19:06:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:09,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:09,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:09,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:06:09,746 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 19:06:09,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash -662400569, now seen corresponding path program 3 times [2024-06-27 19:06:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:09,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609391935] [2024-06-27 19:06:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:11,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:11,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609391935] [2024-06-27 19:06:11,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609391935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:11,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:11,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:11,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836356180] [2024-06-27 19:06:11,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:11,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:11,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:11,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 125 transitions, 1053 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:11,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:11,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:11,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:13,673 INFO L124 PetriNetUnfolderBase]: 4420/6764 cut-off events. [2024-06-27 19:06:13,673 INFO L125 PetriNetUnfolderBase]: For 37362/37362 co-relation queries the response was YES. [2024-06-27 19:06:13,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26907 conditions, 6764 events. 4420/6764 cut-off events. For 37362/37362 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38954 event pairs, 1433 based on Foata normal form. 2/6742 useless extension candidates. Maximal degree in co-relation 26872. Up to 5676 conditions per place. [2024-06-27 19:06:13,704 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 98 selfloop transitions, 70 changer transitions 0/175 dead transitions. [2024-06-27 19:06:13,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 175 transitions, 1630 flow [2024-06-27 19:06:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:06:13,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-27 19:06:13,706 INFO L175 Difference]: Start difference. First operand has 91 places, 125 transitions, 1053 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:06:13,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 175 transitions, 1630 flow [2024-06-27 19:06:13,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 175 transitions, 1543 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 19:06:13,734 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1177 flow [2024-06-27 19:06:13,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-27 19:06:13,735 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2024-06-27 19:06:13,735 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1177 flow [2024-06-27 19:06:13,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:13,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:13,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:13,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:06:13,736 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:13,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1920956345, now seen corresponding path program 1 times [2024-06-27 19:06:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:13,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474297735] [2024-06-27 19:06:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:13,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:15,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:15,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474297735] [2024-06-27 19:06:15,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474297735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:15,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:15,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:06:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650504778] [2024-06-27 19:06:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:15,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:06:15,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:06:15,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:06:15,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:06:15,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1177 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:15,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:15,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:06:15,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:16,660 INFO L124 PetriNetUnfolderBase]: 3733/5968 cut-off events. [2024-06-27 19:06:16,660 INFO L125 PetriNetUnfolderBase]: For 31092/31092 co-relation queries the response was YES. [2024-06-27 19:06:16,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23337 conditions, 5968 events. 3733/5968 cut-off events. For 31092/31092 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 35578 event pairs, 1204 based on Foata normal form. 2/5968 useless extension candidates. Maximal degree in co-relation 23300. Up to 5334 conditions per place. [2024-06-27 19:06:16,696 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 138 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2024-06-27 19:06:16,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 157 transitions, 1595 flow [2024-06-27 19:06:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:06:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:06:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 19:06:16,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-27 19:06:16,698 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1177 flow. Second operand 5 states and 123 transitions. [2024-06-27 19:06:16,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 157 transitions, 1595 flow [2024-06-27 19:06:16,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 157 transitions, 1470 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:06:16,732 INFO L231 Difference]: Finished difference. Result has 97 places, 135 transitions, 1146 flow [2024-06-27 19:06:16,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1146, PETRI_PLACES=97, PETRI_TRANSITIONS=135} [2024-06-27 19:06:16,732 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 45 predicate places. [2024-06-27 19:06:16,732 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 135 transitions, 1146 flow [2024-06-27 19:06:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:16,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:16,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:16,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:06:16,733 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 19:06:16,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:16,733 INFO L85 PathProgramCache]: Analyzing trace with hash 936196687, now seen corresponding path program 1 times [2024-06-27 19:06:16,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:16,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723275210] [2024-06-27 19:06:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:16,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:18,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:18,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723275210] [2024-06-27 19:06:18,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723275210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:18,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:18,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:18,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609643696] [2024-06-27 19:06:18,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:18,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:18,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:18,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:18,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:18,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:18,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 135 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:18,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:18,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:18,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:20,526 INFO L124 PetriNetUnfolderBase]: 4401/6762 cut-off events. [2024-06-27 19:06:20,526 INFO L125 PetriNetUnfolderBase]: For 40391/40391 co-relation queries the response was YES. [2024-06-27 19:06:20,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27090 conditions, 6762 events. 4401/6762 cut-off events. For 40391/40391 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39120 event pairs, 1467 based on Foata normal form. 4/6764 useless extension candidates. Maximal degree in co-relation 27050. Up to 6165 conditions per place. [2024-06-27 19:06:20,568 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 162 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2024-06-27 19:06:20,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 194 transitions, 1686 flow [2024-06-27 19:06:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:06:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:06:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:06:20,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-27 19:06:20,570 INFO L175 Difference]: Start difference. First operand has 97 places, 135 transitions, 1146 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:06:20,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 194 transitions, 1686 flow [2024-06-27 19:06:20,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 194 transitions, 1654 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-27 19:06:20,614 INFO L231 Difference]: Finished difference. Result has 104 places, 135 transitions, 1173 flow [2024-06-27 19:06:20,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=104, PETRI_TRANSITIONS=135} [2024-06-27 19:06:20,615 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 52 predicate places. [2024-06-27 19:06:20,615 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 135 transitions, 1173 flow [2024-06-27 19:06:20,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:20,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:20,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:20,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:06:20,616 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 19:06:20,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:20,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1182383107, now seen corresponding path program 2 times [2024-06-27 19:06:20,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:20,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216286714] [2024-06-27 19:06:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:20,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:22,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:22,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216286714] [2024-06-27 19:06:22,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216286714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:22,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:22,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:22,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265964230] [2024-06-27 19:06:22,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:22,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:22,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:22,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:22,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 135 transitions, 1173 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:22,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:22,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:22,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:25,044 INFO L124 PetriNetUnfolderBase]: 4453/6846 cut-off events. [2024-06-27 19:06:25,044 INFO L125 PetriNetUnfolderBase]: For 43820/43820 co-relation queries the response was YES. [2024-06-27 19:06:25,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27817 conditions, 6846 events. 4453/6846 cut-off events. For 43820/43820 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39542 event pairs, 1339 based on Foata normal form. 4/6845 useless extension candidates. Maximal degree in co-relation 27774. Up to 5700 conditions per place. [2024-06-27 19:06:25,085 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 121 selfloop transitions, 71 changer transitions 0/199 dead transitions. [2024-06-27 19:06:25,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 199 transitions, 1837 flow [2024-06-27 19:06:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:06:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:06:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:06:25,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 19:06:25,087 INFO L175 Difference]: Start difference. First operand has 104 places, 135 transitions, 1173 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:06:25,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 199 transitions, 1837 flow [2024-06-27 19:06:25,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 199 transitions, 1787 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:06:25,140 INFO L231 Difference]: Finished difference. Result has 105 places, 139 transitions, 1330 flow [2024-06-27 19:06:25,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1330, PETRI_PLACES=105, PETRI_TRANSITIONS=139} [2024-06-27 19:06:25,141 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-06-27 19:06:25,141 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 139 transitions, 1330 flow [2024-06-27 19:06:25,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:25,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:25,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:25,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:06:25,141 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 19:06:25,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:25,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1084013677, now seen corresponding path program 3 times [2024-06-27 19:06:25,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:25,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902044484] [2024-06-27 19:06:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:25,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:27,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:27,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902044484] [2024-06-27 19:06:27,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902044484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:27,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:27,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:27,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475619706] [2024-06-27 19:06:27,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:27,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:27,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:27,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:27,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:27,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:27,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 139 transitions, 1330 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:27,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:27,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:27,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:29,186 INFO L124 PetriNetUnfolderBase]: 4567/7035 cut-off events. [2024-06-27 19:06:29,186 INFO L125 PetriNetUnfolderBase]: For 50178/50182 co-relation queries the response was YES. [2024-06-27 19:06:29,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29415 conditions, 7035 events. 4567/7035 cut-off events. For 50178/50182 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 40971 event pairs, 1324 based on Foata normal form. 8/7038 useless extension candidates. Maximal degree in co-relation 29371. Up to 5796 conditions per place. [2024-06-27 19:06:29,226 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 113 selfloop transitions, 81 changer transitions 0/201 dead transitions. [2024-06-27 19:06:29,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 201 transitions, 2118 flow [2024-06-27 19:06:29,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 19:06:29,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-27 19:06:29,229 INFO L175 Difference]: Start difference. First operand has 105 places, 139 transitions, 1330 flow. Second operand 7 states and 187 transitions. [2024-06-27 19:06:29,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 201 transitions, 2118 flow [2024-06-27 19:06:29,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 201 transitions, 1928 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:06:29,274 INFO L231 Difference]: Finished difference. Result has 106 places, 147 transitions, 1441 flow [2024-06-27 19:06:29,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=106, PETRI_TRANSITIONS=147} [2024-06-27 19:06:29,275 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-06-27 19:06:29,275 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 147 transitions, 1441 flow [2024-06-27 19:06:29,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:29,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:29,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:29,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:06:29,275 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 19:06:29,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:29,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1084021613, now seen corresponding path program 1 times [2024-06-27 19:06:29,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:29,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598090485] [2024-06-27 19:06:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:29,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:31,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598090485] [2024-06-27 19:06:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598090485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901935221] [2024-06-27 19:06:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:31,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:31,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 147 transitions, 1441 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:31,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:31,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:31,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:33,574 INFO L124 PetriNetUnfolderBase]: 4609/7097 cut-off events. [2024-06-27 19:06:33,574 INFO L125 PetriNetUnfolderBase]: For 53204/53208 co-relation queries the response was YES. [2024-06-27 19:06:33,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29795 conditions, 7097 events. 4609/7097 cut-off events. For 53204/53208 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 41278 event pairs, 1358 based on Foata normal form. 8/7100 useless extension candidates. Maximal degree in co-relation 29750. Up to 6190 conditions per place. [2024-06-27 19:06:33,613 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 135 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2024-06-27 19:06:33,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 199 transitions, 1999 flow [2024-06-27 19:06:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:06:33,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-27 19:06:33,615 INFO L175 Difference]: Start difference. First operand has 106 places, 147 transitions, 1441 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:06:33,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 199 transitions, 1999 flow [2024-06-27 19:06:33,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 199 transitions, 1885 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:06:33,666 INFO L231 Difference]: Finished difference. Result has 110 places, 150 transitions, 1495 flow [2024-06-27 19:06:33,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=110, PETRI_TRANSITIONS=150} [2024-06-27 19:06:33,667 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-27 19:06:33,667 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 150 transitions, 1495 flow [2024-06-27 19:06:33,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:33,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:33,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:33,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:06:33,667 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 19:06:33,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash 940420653, now seen corresponding path program 4 times [2024-06-27 19:06:33,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:33,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134326963] [2024-06-27 19:06:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:33,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:35,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:35,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134326963] [2024-06-27 19:06:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134326963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:35,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:35,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:35,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201867938] [2024-06-27 19:06:35,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:35,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:35,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:35,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:36,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:36,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 150 transitions, 1495 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:36,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:36,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:36,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:38,114 INFO L124 PetriNetUnfolderBase]: 4599/7013 cut-off events. [2024-06-27 19:06:38,114 INFO L125 PetriNetUnfolderBase]: For 59954/59954 co-relation queries the response was YES. [2024-06-27 19:06:38,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30239 conditions, 7013 events. 4599/7013 cut-off events. For 59954/59954 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 40315 event pairs, 1469 based on Foata normal form. 4/6991 useless extension candidates. Maximal degree in co-relation 30193. Up to 5850 conditions per place. [2024-06-27 19:06:38,155 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 117 selfloop transitions, 82 changer transitions 0/206 dead transitions. [2024-06-27 19:06:38,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 206 transitions, 2123 flow [2024-06-27 19:06:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:06:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:06:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:06:38,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-27 19:06:38,157 INFO L175 Difference]: Start difference. First operand has 110 places, 150 transitions, 1495 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:06:38,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 206 transitions, 2123 flow [2024-06-27 19:06:38,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 206 transitions, 1965 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:06:38,211 INFO L231 Difference]: Finished difference. Result has 113 places, 150 transitions, 1510 flow [2024-06-27 19:06:38,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1510, PETRI_PLACES=113, PETRI_TRANSITIONS=150} [2024-06-27 19:06:38,211 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 61 predicate places. [2024-06-27 19:06:38,211 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 150 transitions, 1510 flow [2024-06-27 19:06:38,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:38,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:38,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:38,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:06:38,212 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 19:06:38,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2051245915, now seen corresponding path program 5 times [2024-06-27 19:06:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923886203] [2024-06-27 19:06:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:40,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:40,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923886203] [2024-06-27 19:06:40,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923886203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:40,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:40,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:06:40,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510281405] [2024-06-27 19:06:40,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:06:40,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:40,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:06:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:06:40,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:40,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 150 transitions, 1510 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:40,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:40,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:40,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:42,029 INFO L124 PetriNetUnfolderBase]: 4589/7035 cut-off events. [2024-06-27 19:06:42,029 INFO L125 PetriNetUnfolderBase]: For 62409/62421 co-relation queries the response was YES. [2024-06-27 19:06:42,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30347 conditions, 7035 events. 4589/7035 cut-off events. For 62409/62421 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 40803 event pairs, 1372 based on Foata normal form. 12/7029 useless extension candidates. Maximal degree in co-relation 30300. Up to 5842 conditions per place. [2024-06-27 19:06:42,078 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 110 selfloop transitions, 79 changer transitions 0/196 dead transitions. [2024-06-27 19:06:42,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 196 transitions, 2022 flow [2024-06-27 19:06:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:06:42,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-27 19:06:42,080 INFO L175 Difference]: Start difference. First operand has 113 places, 150 transitions, 1510 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:06:42,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 196 transitions, 2022 flow [2024-06-27 19:06:42,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 196 transitions, 1796 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 19:06:42,156 INFO L231 Difference]: Finished difference. Result has 112 places, 150 transitions, 1452 flow [2024-06-27 19:06:42,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1452, PETRI_PLACES=112, PETRI_TRANSITIONS=150} [2024-06-27 19:06:42,157 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-27 19:06:42,157 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 150 transitions, 1452 flow [2024-06-27 19:06:42,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:42,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:42,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:42,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:06:42,158 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 19:06:42,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1206333259, now seen corresponding path program 2 times [2024-06-27 19:06:42,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:42,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566563949] [2024-06-27 19:06:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:44,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:44,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566563949] [2024-06-27 19:06:44,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566563949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:44,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:44,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:44,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772185338] [2024-06-27 19:06:44,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:44,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:44,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:44,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:44,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:44,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 1452 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:44,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:44,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:44,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:46,518 INFO L124 PetriNetUnfolderBase]: 4631/7129 cut-off events. [2024-06-27 19:06:46,518 INFO L125 PetriNetUnfolderBase]: For 64545/64557 co-relation queries the response was YES. [2024-06-27 19:06:46,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30660 conditions, 7129 events. 4631/7129 cut-off events. For 64545/64557 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 41467 event pairs, 1379 based on Foata normal form. 12/7129 useless extension candidates. Maximal degree in co-relation 30613. Up to 6234 conditions per place. [2024-06-27 19:06:46,565 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 136 selfloop transitions, 56 changer transitions 0/199 dead transitions. [2024-06-27 19:06:46,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 199 transitions, 2014 flow [2024-06-27 19:06:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:06:46,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 19:06:46,567 INFO L175 Difference]: Start difference. First operand has 112 places, 150 transitions, 1452 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:06:46,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 199 transitions, 2014 flow [2024-06-27 19:06:46,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1636 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 19:06:46,638 INFO L231 Difference]: Finished difference. Result has 109 places, 153 transitions, 1245 flow [2024-06-27 19:06:46,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=109, PETRI_TRANSITIONS=153} [2024-06-27 19:06:46,638 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-27 19:06:46,638 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 153 transitions, 1245 flow [2024-06-27 19:06:46,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:46,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:46,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:06:46,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:06:46,639 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:06:46,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:46,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1206659689, now seen corresponding path program 3 times [2024-06-27 19:06:46,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:46,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512783724] [2024-06-27 19:06:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:46,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:49,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:49,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512783724] [2024-06-27 19:06:49,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512783724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:49,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:49,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250567357] [2024-06-27 19:06:49,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:49,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:49,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:49,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 153 transitions, 1245 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:49,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:49,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:49,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:50,805 INFO L124 PetriNetUnfolderBase]: 4623/6997 cut-off events. [2024-06-27 19:06:50,805 INFO L125 PetriNetUnfolderBase]: For 66704/66716 co-relation queries the response was YES. [2024-06-27 19:06:50,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30392 conditions, 6997 events. 4623/6997 cut-off events. For 66704/66716 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 40186 event pairs, 1291 based on Foata normal form. 12/6997 useless extension candidates. Maximal degree in co-relation 30347. Up to 6080 conditions per place. [2024-06-27 19:06:50,849 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 130 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-06-27 19:06:50,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 201 transitions, 1809 flow [2024-06-27 19:06:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:06:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:06:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:06:50,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-27 19:06:50,851 INFO L175 Difference]: Start difference. First operand has 109 places, 153 transitions, 1245 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:06:50,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 201 transitions, 1809 flow [2024-06-27 19:06:50,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 201 transitions, 1664 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 19:06:50,913 INFO L231 Difference]: Finished difference. Result has 111 places, 156 transitions, 1292 flow [2024-06-27 19:06:50,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=111, PETRI_TRANSITIONS=156} [2024-06-27 19:06:50,914 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-27 19:06:50,914 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 156 transitions, 1292 flow [2024-06-27 19:06:50,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:50,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:50,914 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 19:06:50,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:06:50,914 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 19:06:50,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:50,915 INFO L85 PathProgramCache]: Analyzing trace with hash -517646138, now seen corresponding path program 1 times [2024-06-27 19:06:50,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:50,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530599589] [2024-06-27 19:06:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:53,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:53,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530599589] [2024-06-27 19:06:53,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530599589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:53,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:53,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:53,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440308097] [2024-06-27 19:06:53,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:53,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:53,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:53,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:53,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 156 transitions, 1292 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:53,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:53,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:53,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:06:55,524 INFO L124 PetriNetUnfolderBase]: 4941/7608 cut-off events. [2024-06-27 19:06:55,524 INFO L125 PetriNetUnfolderBase]: For 87610/87610 co-relation queries the response was YES. [2024-06-27 19:06:55,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34341 conditions, 7608 events. 4941/7608 cut-off events. For 87610/87610 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 44850 event pairs, 1089 based on Foata normal form. 4/7610 useless extension candidates. Maximal degree in co-relation 34295. Up to 6475 conditions per place. [2024-06-27 19:06:55,575 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 199 selfloop transitions, 32 changer transitions 0/238 dead transitions. [2024-06-27 19:06:55,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 238 transitions, 2174 flow [2024-06-27 19:06:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:06:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:06:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 19:06:55,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 19:06:55,577 INFO L175 Difference]: Start difference. First operand has 111 places, 156 transitions, 1292 flow. Second operand 9 states and 234 transitions. [2024-06-27 19:06:55,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 238 transitions, 2174 flow [2024-06-27 19:06:55,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 238 transitions, 2006 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:06:55,670 INFO L231 Difference]: Finished difference. Result has 115 places, 161 transitions, 1308 flow [2024-06-27 19:06:55,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1308, PETRI_PLACES=115, PETRI_TRANSITIONS=161} [2024-06-27 19:06:55,670 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 63 predicate places. [2024-06-27 19:06:55,670 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 161 transitions, 1308 flow [2024-06-27 19:06:55,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:55,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:06:55,671 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 19:06:55,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:06:55,671 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 19:06:55,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:06:55,671 INFO L85 PathProgramCache]: Analyzing trace with hash 822373800, now seen corresponding path program 2 times [2024-06-27 19:06:55,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:06:55,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732018409] [2024-06-27 19:06:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:06:55,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:06:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:06:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:06:58,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:06:58,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732018409] [2024-06-27 19:06:58,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732018409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:06:58,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:06:58,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:06:58,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937857598] [2024-06-27 19:06:58,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:06:58,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:06:58,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:06:58,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:06:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:06:58,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:06:58,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 161 transitions, 1308 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:06:58,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:06:58,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:06:58,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:00,061 INFO L124 PetriNetUnfolderBase]: 4933/7596 cut-off events. [2024-06-27 19:07:00,061 INFO L125 PetriNetUnfolderBase]: For 93427/93427 co-relation queries the response was YES. [2024-06-27 19:07:00,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34625 conditions, 7596 events. 4933/7596 cut-off events. For 93427/93427 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 44734 event pairs, 1429 based on Foata normal form. 4/7598 useless extension candidates. Maximal degree in co-relation 34578. Up to 6911 conditions per place. [2024-06-27 19:07:00,118 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 198 selfloop transitions, 28 changer transitions 0/233 dead transitions. [2024-06-27 19:07:00,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 233 transitions, 2018 flow [2024-06-27 19:07:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:07:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:07:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-27 19:07:00,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-27 19:07:00,120 INFO L175 Difference]: Start difference. First operand has 115 places, 161 transitions, 1308 flow. Second operand 9 states and 226 transitions. [2024-06-27 19:07:00,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 233 transitions, 2018 flow [2024-06-27 19:07:00,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 233 transitions, 1915 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 19:07:00,234 INFO L231 Difference]: Finished difference. Result has 119 places, 164 transitions, 1341 flow [2024-06-27 19:07:00,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1341, PETRI_PLACES=119, PETRI_TRANSITIONS=164} [2024-06-27 19:07:00,235 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 67 predicate places. [2024-06-27 19:07:00,235 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 164 transitions, 1341 flow [2024-06-27 19:07:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:00,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:00,235 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 19:07:00,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:07:00,235 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 19:07:00,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:00,236 INFO L85 PathProgramCache]: Analyzing trace with hash -761746588, now seen corresponding path program 3 times [2024-06-27 19:07:00,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:00,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844241706] [2024-06-27 19:07:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:00,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:02,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:02,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844241706] [2024-06-27 19:07:02,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844241706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:02,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:02,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:02,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726974481] [2024-06-27 19:07:02,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:02,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:02,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:02,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:02,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:02,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:02,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 164 transitions, 1341 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:02,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:02,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:02,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:04,776 INFO L124 PetriNetUnfolderBase]: 4975/7660 cut-off events. [2024-06-27 19:07:04,776 INFO L125 PetriNetUnfolderBase]: For 98878/98878 co-relation queries the response was YES. [2024-06-27 19:07:04,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35286 conditions, 7660 events. 4975/7660 cut-off events. For 98878/98878 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 45061 event pairs, 1253 based on Foata normal form. 4/7659 useless extension candidates. Maximal degree in co-relation 35237. Up to 6386 conditions per place. [2024-06-27 19:07:04,832 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 136 selfloop transitions, 82 changer transitions 0/225 dead transitions. [2024-06-27 19:07:04,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 225 transitions, 2007 flow [2024-06-27 19:07:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:07:04,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-27 19:07:04,834 INFO L175 Difference]: Start difference. First operand has 119 places, 164 transitions, 1341 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:07:04,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 225 transitions, 2007 flow [2024-06-27 19:07:04,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 225 transitions, 1909 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 19:07:04,958 INFO L231 Difference]: Finished difference. Result has 120 places, 167 transitions, 1489 flow [2024-06-27 19:07:04,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1489, PETRI_PLACES=120, PETRI_TRANSITIONS=167} [2024-06-27 19:07:04,958 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 68 predicate places. [2024-06-27 19:07:04,958 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 167 transitions, 1489 flow [2024-06-27 19:07:04,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:04,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:04,959 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 19:07:04,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:07:04,959 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:04,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:04,959 INFO L85 PathProgramCache]: Analyzing trace with hash -852988936, now seen corresponding path program 1 times [2024-06-27 19:07:04,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:04,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201480489] [2024-06-27 19:07:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:04,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:06,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:06,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201480489] [2024-06-27 19:07:06,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201480489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:06,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:06,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:07:06,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841655857] [2024-06-27 19:07:06,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:06,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:07:06,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:06,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:07:06,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:07:06,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:06,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 167 transitions, 1489 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:06,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:06,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:06,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:08,484 INFO L124 PetriNetUnfolderBase]: 5021/7708 cut-off events. [2024-06-27 19:07:08,484 INFO L125 PetriNetUnfolderBase]: For 108311/108311 co-relation queries the response was YES. [2024-06-27 19:07:08,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36510 conditions, 7708 events. 5021/7708 cut-off events. For 108311/108311 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 45235 event pairs, 1367 based on Foata normal form. 2/7708 useless extension candidates. Maximal degree in co-relation 36460. Up to 7027 conditions per place. [2024-06-27 19:07:08,543 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 190 selfloop transitions, 22 changer transitions 0/219 dead transitions. [2024-06-27 19:07:08,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 219 transitions, 2253 flow [2024-06-27 19:07:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:07:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:07:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 19:07:08,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-27 19:07:08,545 INFO L175 Difference]: Start difference. First operand has 120 places, 167 transitions, 1489 flow. Second operand 6 states and 152 transitions. [2024-06-27 19:07:08,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 219 transitions, 2253 flow [2024-06-27 19:07:08,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 219 transitions, 2031 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:08,700 INFO L231 Difference]: Finished difference. Result has 122 places, 177 transitions, 1441 flow [2024-06-27 19:07:08,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1441, PETRI_PLACES=122, PETRI_TRANSITIONS=177} [2024-06-27 19:07:08,700 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-06-27 19:07:08,700 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 177 transitions, 1441 flow [2024-06-27 19:07:08,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:08,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:08,700 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 19:07:08,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:07:08,701 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 19:07:08,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 962749284, now seen corresponding path program 4 times [2024-06-27 19:07:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:08,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978483254] [2024-06-27 19:07:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:08,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:11,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:11,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978483254] [2024-06-27 19:07:11,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978483254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:11,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:11,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:11,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756733303] [2024-06-27 19:07:11,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:11,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:11,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:11,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:11,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 177 transitions, 1441 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:11,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:11,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:11,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:13,269 INFO L124 PetriNetUnfolderBase]: 5013/7678 cut-off events. [2024-06-27 19:07:13,270 INFO L125 PetriNetUnfolderBase]: For 113119/113119 co-relation queries the response was YES. [2024-06-27 19:07:13,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36838 conditions, 7678 events. 5013/7678 cut-off events. For 113119/113119 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 44769 event pairs, 1414 based on Foata normal form. 4/7654 useless extension candidates. Maximal degree in co-relation 36785. Up to 6436 conditions per place. [2024-06-27 19:07:13,329 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 142 selfloop transitions, 85 changer transitions 0/234 dead transitions. [2024-06-27 19:07:13,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 234 transitions, 2127 flow [2024-06-27 19:07:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:07:13,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-27 19:07:13,331 INFO L175 Difference]: Start difference. First operand has 122 places, 177 transitions, 1441 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:07:13,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 234 transitions, 2127 flow [2024-06-27 19:07:13,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 234 transitions, 2119 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 19:07:13,427 INFO L231 Difference]: Finished difference. Result has 129 places, 180 transitions, 1693 flow [2024-06-27 19:07:13,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1693, PETRI_PLACES=129, PETRI_TRANSITIONS=180} [2024-06-27 19:07:13,428 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 77 predicate places. [2024-06-27 19:07:13,428 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 180 transitions, 1693 flow [2024-06-27 19:07:13,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:13,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:13,428 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 19:07:13,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:07:13,429 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:13,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash 409073442, now seen corresponding path program 2 times [2024-06-27 19:07:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:13,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347412563] [2024-06-27 19:07:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:13,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:15,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347412563] [2024-06-27 19:07:15,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347412563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:15,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:07:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112026128] [2024-06-27 19:07:15,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:15,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:07:15,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:07:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:07:15,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:15,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 180 transitions, 1693 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:15,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:15,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:15,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:17,102 INFO L124 PetriNetUnfolderBase]: 5007/7597 cut-off events. [2024-06-27 19:07:17,102 INFO L125 PetriNetUnfolderBase]: For 123353/123353 co-relation queries the response was YES. [2024-06-27 19:07:17,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38044 conditions, 7597 events. 5007/7597 cut-off events. For 123353/123353 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 44249 event pairs, 1379 based on Foata normal form. 2/7589 useless extension candidates. Maximal degree in co-relation 37988. Up to 7010 conditions per place. [2024-06-27 19:07:17,159 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 184 selfloop transitions, 24 changer transitions 0/215 dead transitions. [2024-06-27 19:07:17,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 215 transitions, 2293 flow [2024-06-27 19:07:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:07:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:07:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:07:17,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:07:17,160 INFO L175 Difference]: Start difference. First operand has 129 places, 180 transitions, 1693 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:07:17,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 215 transitions, 2293 flow [2024-06-27 19:07:17,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 215 transitions, 2057 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:17,287 INFO L231 Difference]: Finished difference. Result has 129 places, 182 transitions, 1531 flow [2024-06-27 19:07:17,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=129, PETRI_TRANSITIONS=182} [2024-06-27 19:07:17,288 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 77 predicate places. [2024-06-27 19:07:17,288 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 182 transitions, 1531 flow [2024-06-27 19:07:17,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:17,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:17,288 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 19:07:17,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:07:17,289 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:17,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash 403366466, now seen corresponding path program 1 times [2024-06-27 19:07:17,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:17,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86810877] [2024-06-27 19:07:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:17,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:19,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:19,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86810877] [2024-06-27 19:07:19,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86810877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:19,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:19,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:07:19,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675606299] [2024-06-27 19:07:19,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:19,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:07:19,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:07:19,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:07:19,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:07:19,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 182 transitions, 1531 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:19,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:19,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:07:19,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:20,873 INFO L124 PetriNetUnfolderBase]: 4597/7275 cut-off events. [2024-06-27 19:07:20,873 INFO L125 PetriNetUnfolderBase]: For 109958/109958 co-relation queries the response was YES. [2024-06-27 19:07:20,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34801 conditions, 7275 events. 4597/7275 cut-off events. For 109958/109958 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 44398 event pairs, 1193 based on Foata normal form. 2/7249 useless extension candidates. Maximal degree in co-relation 34744. Up to 6280 conditions per place. [2024-06-27 19:07:20,928 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 195 selfloop transitions, 26 changer transitions 0/232 dead transitions. [2024-06-27 19:07:20,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 232 transitions, 2415 flow [2024-06-27 19:07:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:07:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:07:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:07:20,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-06-27 19:07:20,930 INFO L175 Difference]: Start difference. First operand has 129 places, 182 transitions, 1531 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:07:20,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 232 transitions, 2415 flow [2024-06-27 19:07:21,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 232 transitions, 2389 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:07:21,047 INFO L231 Difference]: Finished difference. Result has 135 places, 192 transitions, 1727 flow [2024-06-27 19:07:21,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1727, PETRI_PLACES=135, PETRI_TRANSITIONS=192} [2024-06-27 19:07:21,047 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 83 predicate places. [2024-06-27 19:07:21,047 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 192 transitions, 1727 flow [2024-06-27 19:07:21,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:21,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:21,048 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 19:07:21,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:07:21,048 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:21,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 810365156, now seen corresponding path program 2 times [2024-06-27 19:07:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:21,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267776084] [2024-06-27 19:07:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:22,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:22,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267776084] [2024-06-27 19:07:22,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267776084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:22,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:22,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:07:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252737379] [2024-06-27 19:07:22,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:22,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:07:22,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:07:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:07:22,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:07:22,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 192 transitions, 1727 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:22,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:22,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:07:22,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:24,584 INFO L124 PetriNetUnfolderBase]: 4785/7558 cut-off events. [2024-06-27 19:07:24,584 INFO L125 PetriNetUnfolderBase]: For 122825/122825 co-relation queries the response was YES. [2024-06-27 19:07:24,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37859 conditions, 7558 events. 4785/7558 cut-off events. For 122825/122825 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 46244 event pairs, 1211 based on Foata normal form. 3/7540 useless extension candidates. Maximal degree in co-relation 37798. Up to 6642 conditions per place. [2024-06-27 19:07:24,635 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 206 selfloop transitions, 21 changer transitions 0/238 dead transitions. [2024-06-27 19:07:24,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 238 transitions, 2488 flow [2024-06-27 19:07:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:07:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:07:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-27 19:07:24,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-27 19:07:24,637 INFO L175 Difference]: Start difference. First operand has 135 places, 192 transitions, 1727 flow. Second operand 7 states and 171 transitions. [2024-06-27 19:07:24,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 238 transitions, 2488 flow [2024-06-27 19:07:24,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 238 transitions, 2420 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-27 19:07:24,788 INFO L231 Difference]: Finished difference. Result has 142 places, 200 transitions, 1861 flow [2024-06-27 19:07:24,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1861, PETRI_PLACES=142, PETRI_TRANSITIONS=200} [2024-06-27 19:07:24,789 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 90 predicate places. [2024-06-27 19:07:24,789 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 200 transitions, 1861 flow [2024-06-27 19:07:24,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:24,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:24,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:24,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:07:24,789 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:24,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1948190768, now seen corresponding path program 1 times [2024-06-27 19:07:24,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:24,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019074152] [2024-06-27 19:07:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:24,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:27,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:27,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019074152] [2024-06-27 19:07:27,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019074152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:27,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:27,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:27,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750676006] [2024-06-27 19:07:27,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:27,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:27,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:27,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:27,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:27,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 200 transitions, 1861 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:27,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:27,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:27,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:29,489 INFO L124 PetriNetUnfolderBase]: 5386/8260 cut-off events. [2024-06-27 19:07:29,489 INFO L125 PetriNetUnfolderBase]: For 158255/158255 co-relation queries the response was YES. [2024-06-27 19:07:29,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42330 conditions, 8260 events. 5386/8260 cut-off events. For 158255/158255 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 48782 event pairs, 1110 based on Foata normal form. 16/8274 useless extension candidates. Maximal degree in co-relation 42265. Up to 6945 conditions per place. [2024-06-27 19:07:29,553 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 238 selfloop transitions, 36 changer transitions 0/281 dead transitions. [2024-06-27 19:07:29,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 281 transitions, 2789 flow [2024-06-27 19:07:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:07:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:07:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 19:07:29,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-06-27 19:07:29,555 INFO L175 Difference]: Start difference. First operand has 142 places, 200 transitions, 1861 flow. Second operand 9 states and 236 transitions. [2024-06-27 19:07:29,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 281 transitions, 2789 flow [2024-06-27 19:07:29,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 281 transitions, 2706 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 19:07:29,726 INFO L231 Difference]: Finished difference. Result has 147 places, 202 transitions, 1902 flow [2024-06-27 19:07:29,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1902, PETRI_PLACES=147, PETRI_TRANSITIONS=202} [2024-06-27 19:07:29,727 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-27 19:07:29,727 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 202 transitions, 1902 flow [2024-06-27 19:07:29,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:29,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:29,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:29,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:07:29,727 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:29,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:29,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1741869944, now seen corresponding path program 2 times [2024-06-27 19:07:29,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:29,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952213993] [2024-06-27 19:07:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:29,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:32,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:32,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952213993] [2024-06-27 19:07:32,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952213993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:32,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:32,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:32,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764175489] [2024-06-27 19:07:32,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:32,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:32,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:32,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:32,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:32,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 202 transitions, 1902 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:32,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:32,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:32,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:34,428 INFO L124 PetriNetUnfolderBase]: 5350/8204 cut-off events. [2024-06-27 19:07:34,428 INFO L125 PetriNetUnfolderBase]: For 155055/155055 co-relation queries the response was YES. [2024-06-27 19:07:34,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41614 conditions, 8204 events. 5350/8204 cut-off events. For 155055/155055 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 48306 event pairs, 1456 based on Foata normal form. 20/8222 useless extension candidates. Maximal degree in co-relation 41548. Up to 7287 conditions per place. [2024-06-27 19:07:34,493 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 241 selfloop transitions, 27 changer transitions 0/275 dead transitions. [2024-06-27 19:07:34,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 275 transitions, 2648 flow [2024-06-27 19:07:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:07:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:07:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 19:07:34,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-27 19:07:34,495 INFO L175 Difference]: Start difference. First operand has 147 places, 202 transitions, 1902 flow. Second operand 9 states and 229 transitions. [2024-06-27 19:07:34,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 275 transitions, 2648 flow [2024-06-27 19:07:34,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 275 transitions, 2510 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:34,738 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 1826 flow [2024-06-27 19:07:34,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1826, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2024-06-27 19:07:34,738 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-27 19:07:34,738 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 1826 flow [2024-06-27 19:07:34,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:34,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:34,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:34,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:07:34,739 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:34,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash 966313482, now seen corresponding path program 3 times [2024-06-27 19:07:34,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:34,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845430137] [2024-06-27 19:07:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:34,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:37,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:37,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845430137] [2024-06-27 19:07:37,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845430137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:37,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:37,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072433390] [2024-06-27 19:07:37,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:37,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:37,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:37,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:37,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:37,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:37,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 1826 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:37,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:37,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:37,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:40,204 INFO L124 PetriNetUnfolderBase]: 5540/8516 cut-off events. [2024-06-27 19:07:40,204 INFO L125 PetriNetUnfolderBase]: For 166681/166681 co-relation queries the response was YES. [2024-06-27 19:07:40,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42765 conditions, 8516 events. 5540/8516 cut-off events. For 166681/166681 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 50588 event pairs, 1322 based on Foata normal form. 20/8531 useless extension candidates. Maximal degree in co-relation 42698. Up to 6990 conditions per place. [2024-06-27 19:07:40,260 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 188 selfloop transitions, 81 changer transitions 0/276 dead transitions. [2024-06-27 19:07:40,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 276 transitions, 2636 flow [2024-06-27 19:07:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:07:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:07:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 19:07:40,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393518518518519 [2024-06-27 19:07:40,262 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 1826 flow. Second operand 9 states and 233 transitions. [2024-06-27 19:07:40,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 276 transitions, 2636 flow [2024-06-27 19:07:40,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 276 transitions, 2550 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:07:40,417 INFO L231 Difference]: Finished difference. Result has 150 places, 204 transitions, 1980 flow [2024-06-27 19:07:40,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1980, PETRI_PLACES=150, PETRI_TRANSITIONS=204} [2024-06-27 19:07:40,418 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-27 19:07:40,418 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 204 transitions, 1980 flow [2024-06-27 19:07:40,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:40,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:40,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:40,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:07:40,418 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:40,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:40,418 INFO L85 PathProgramCache]: Analyzing trace with hash 966165612, now seen corresponding path program 4 times [2024-06-27 19:07:40,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248402912] [2024-06-27 19:07:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:43,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:43,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248402912] [2024-06-27 19:07:43,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248402912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:43,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:43,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390394048] [2024-06-27 19:07:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:43,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:43,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 204 transitions, 1980 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:43,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:43,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:43,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:45,989 INFO L124 PetriNetUnfolderBase]: 5688/8744 cut-off events. [2024-06-27 19:07:45,989 INFO L125 PetriNetUnfolderBase]: For 183816/183816 co-relation queries the response was YES. [2024-06-27 19:07:46,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44951 conditions, 8744 events. 5688/8744 cut-off events. For 183816/183816 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 52109 event pairs, 1298 based on Foata normal form. 16/8755 useless extension candidates. Maximal degree in co-relation 44883. Up to 6988 conditions per place. [2024-06-27 19:07:46,055 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 198 selfloop transitions, 86 changer transitions 0/291 dead transitions. [2024-06-27 19:07:46,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 291 transitions, 2860 flow [2024-06-27 19:07:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:07:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:07:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 19:07:46,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 19:07:46,057 INFO L175 Difference]: Start difference. First operand has 150 places, 204 transitions, 1980 flow. Second operand 10 states and 260 transitions. [2024-06-27 19:07:46,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 291 transitions, 2860 flow [2024-06-27 19:07:46,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 291 transitions, 2648 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 19:07:46,287 INFO L231 Difference]: Finished difference. Result has 153 places, 206 transitions, 2021 flow [2024-06-27 19:07:46,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2021, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2024-06-27 19:07:46,287 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 101 predicate places. [2024-06-27 19:07:46,287 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 2021 flow [2024-06-27 19:07:46,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:46,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:46,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:46,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:07:46,288 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:46,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1165615272, now seen corresponding path program 5 times [2024-06-27 19:07:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:46,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010231856] [2024-06-27 19:07:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:46,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:48,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:48,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010231856] [2024-06-27 19:07:48,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010231856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:48,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:48,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:07:48,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474587239] [2024-06-27 19:07:48,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:48,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:07:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:48,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:07:48,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:07:48,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:48,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 2021 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:48,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:48,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:48,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:51,274 INFO L124 PetriNetUnfolderBase]: 5878/9055 cut-off events. [2024-06-27 19:07:51,274 INFO L125 PetriNetUnfolderBase]: For 198958/198962 co-relation queries the response was YES. [2024-06-27 19:07:51,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46601 conditions, 9055 events. 5878/9055 cut-off events. For 198958/198962 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 54397 event pairs, 1353 based on Foata normal form. 24/9074 useless extension candidates. Maximal degree in co-relation 46532. Up to 7508 conditions per place. [2024-06-27 19:07:51,346 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 182 selfloop transitions, 83 changer transitions 0/272 dead transitions. [2024-06-27 19:07:51,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 272 transitions, 2809 flow [2024-06-27 19:07:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:07:51,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-27 19:07:51,348 INFO L175 Difference]: Start difference. First operand has 153 places, 206 transitions, 2021 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:07:51,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 272 transitions, 2809 flow [2024-06-27 19:07:51,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 272 transitions, 2574 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 19:07:51,621 INFO L231 Difference]: Finished difference. Result has 153 places, 208 transitions, 2038 flow [2024-06-27 19:07:51,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2038, PETRI_PLACES=153, PETRI_TRANSITIONS=208} [2024-06-27 19:07:51,622 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 101 predicate places. [2024-06-27 19:07:51,622 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 208 transitions, 2038 flow [2024-06-27 19:07:51,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:51,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:51,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:51,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:07:51,623 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:51,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:51,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1173239784, now seen corresponding path program 1 times [2024-06-27 19:07:51,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:51,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773402125] [2024-06-27 19:07:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:51,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:54,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:54,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773402125] [2024-06-27 19:07:54,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773402125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:54,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:54,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:07:54,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881279147] [2024-06-27 19:07:54,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:54,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:07:54,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:54,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:07:54,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:07:54,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:54,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 208 transitions, 2038 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:54,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:54,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:54,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:07:57,258 INFO L124 PetriNetUnfolderBase]: 6210/9567 cut-off events. [2024-06-27 19:07:57,258 INFO L125 PetriNetUnfolderBase]: For 230032/230036 co-relation queries the response was YES. [2024-06-27 19:07:57,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50364 conditions, 9567 events. 6210/9567 cut-off events. For 230032/230036 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 58220 event pairs, 1401 based on Foata normal form. 16/9578 useless extension candidates. Maximal degree in co-relation 50294. Up to 7024 conditions per place. [2024-06-27 19:07:57,340 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 182 selfloop transitions, 91 changer transitions 0/280 dead transitions. [2024-06-27 19:07:57,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 280 transitions, 3068 flow [2024-06-27 19:07:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:07:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:07:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 19:07:57,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-27 19:07:57,342 INFO L175 Difference]: Start difference. First operand has 153 places, 208 transitions, 2038 flow. Second operand 8 states and 213 transitions. [2024-06-27 19:07:57,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 280 transitions, 3068 flow [2024-06-27 19:07:57,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 280 transitions, 2844 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:07:57,672 INFO L231 Difference]: Finished difference. Result has 155 places, 212 transitions, 2163 flow [2024-06-27 19:07:57,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2163, PETRI_PLACES=155, PETRI_TRANSITIONS=212} [2024-06-27 19:07:57,672 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 103 predicate places. [2024-06-27 19:07:57,672 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 212 transitions, 2163 flow [2024-06-27 19:07:57,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:57,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:07:57,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:07:57,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:07:57,673 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:07:57,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:07:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash -587407728, now seen corresponding path program 1 times [2024-06-27 19:07:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:07:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056198957] [2024-06-27 19:07:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:07:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:07:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:07:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:07:59,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:07:59,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056198957] [2024-06-27 19:07:59,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056198957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:07:59,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:07:59,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:07:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110814092] [2024-06-27 19:07:59,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:07:59,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:07:59,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:07:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:07:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:07:59,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:07:59,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 212 transitions, 2163 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:07:59,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:07:59,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:07:59,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:02,314 INFO L124 PetriNetUnfolderBase]: 6302/9670 cut-off events. [2024-06-27 19:08:02,315 INFO L125 PetriNetUnfolderBase]: For 228206/228206 co-relation queries the response was YES. [2024-06-27 19:08:02,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50650 conditions, 9670 events. 6302/9670 cut-off events. For 228206/228206 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 58776 event pairs, 1616 based on Foata normal form. 4/9672 useless extension candidates. Maximal degree in co-relation 50579. Up to 8732 conditions per place. [2024-06-27 19:08:02,394 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 233 selfloop transitions, 31 changer transitions 0/271 dead transitions. [2024-06-27 19:08:02,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 271 transitions, 3129 flow [2024-06-27 19:08:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:08:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:08:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:08:02,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-27 19:08:02,396 INFO L175 Difference]: Start difference. First operand has 155 places, 212 transitions, 2163 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:08:02,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 271 transitions, 3129 flow [2024-06-27 19:08:02,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 271 transitions, 2958 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:02,702 INFO L231 Difference]: Finished difference. Result has 158 places, 218 transitions, 2118 flow [2024-06-27 19:08:02,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2118, PETRI_PLACES=158, PETRI_TRANSITIONS=218} [2024-06-27 19:08:02,702 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-27 19:08:02,702 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 218 transitions, 2118 flow [2024-06-27 19:08:02,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:02,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:02,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:02,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:08:02,703 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:02,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:02,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1663762442, now seen corresponding path program 6 times [2024-06-27 19:08:02,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:02,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920130370] [2024-06-27 19:08:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:02,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:05,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:05,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920130370] [2024-06-27 19:08:05,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920130370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:05,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:05,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:08:05,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547853357] [2024-06-27 19:08:05,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:05,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:08:05,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:08:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:08:05,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:05,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 218 transitions, 2118 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:05,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:05,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:05,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:07,764 INFO L124 PetriNetUnfolderBase]: 6492/9879 cut-off events. [2024-06-27 19:08:07,764 INFO L125 PetriNetUnfolderBase]: For 246600/246612 co-relation queries the response was YES. [2024-06-27 19:08:07,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52834 conditions, 9879 events. 6492/9879 cut-off events. For 246600/246612 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 60002 event pairs, 1545 based on Foata normal form. 28/9889 useless extension candidates. Maximal degree in co-relation 52761. Up to 8434 conditions per place. [2024-06-27 19:08:07,849 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 192 selfloop transitions, 81 changer transitions 0/280 dead transitions. [2024-06-27 19:08:07,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 280 transitions, 2926 flow [2024-06-27 19:08:07,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:08:07,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 19:08:07,850 INFO L175 Difference]: Start difference. First operand has 158 places, 218 transitions, 2118 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:08:07,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 280 transitions, 2926 flow [2024-06-27 19:08:08,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 280 transitions, 2893 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 19:08:08,159 INFO L231 Difference]: Finished difference. Result has 163 places, 220 transitions, 2341 flow [2024-06-27 19:08:08,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2341, PETRI_PLACES=163, PETRI_TRANSITIONS=220} [2024-06-27 19:08:08,160 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-27 19:08:08,160 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 220 transitions, 2341 flow [2024-06-27 19:08:08,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:08,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:08,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:08,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:08:08,160 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:08,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1801168428, now seen corresponding path program 7 times [2024-06-27 19:08:08,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:08,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451079614] [2024-06-27 19:08:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:08,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:10,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:10,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451079614] [2024-06-27 19:08:10,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451079614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:10,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:10,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:10,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208609606] [2024-06-27 19:08:10,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:10,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:10,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:10,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:10,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:10,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 220 transitions, 2341 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:10,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:10,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:10,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:13,767 INFO L124 PetriNetUnfolderBase]: 6456/9820 cut-off events. [2024-06-27 19:08:13,767 INFO L125 PetriNetUnfolderBase]: For 248625/248625 co-relation queries the response was YES. [2024-06-27 19:08:13,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52897 conditions, 9820 events. 6456/9820 cut-off events. For 248625/248625 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 59380 event pairs, 1628 based on Foata normal form. 20/9814 useless extension candidates. Maximal degree in co-relation 52822. Up to 8378 conditions per place. [2024-06-27 19:08:13,856 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 197 selfloop transitions, 84 changer transitions 0/288 dead transitions. [2024-06-27 19:08:13,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 288 transitions, 3105 flow [2024-06-27 19:08:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:08:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:08:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 19:08:13,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-27 19:08:13,858 INFO L175 Difference]: Start difference. First operand has 163 places, 220 transitions, 2341 flow. Second operand 9 states and 227 transitions. [2024-06-27 19:08:13,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 288 transitions, 3105 flow [2024-06-27 19:08:14,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 288 transitions, 2843 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:14,332 INFO L231 Difference]: Finished difference. Result has 166 places, 220 transitions, 2255 flow [2024-06-27 19:08:14,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2255, PETRI_PLACES=166, PETRI_TRANSITIONS=220} [2024-06-27 19:08:14,333 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2024-06-27 19:08:14,333 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 220 transitions, 2255 flow [2024-06-27 19:08:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:14,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:14,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:14,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:08:14,333 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:14,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:14,334 INFO L85 PathProgramCache]: Analyzing trace with hash -219541456, now seen corresponding path program 8 times [2024-06-27 19:08:14,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:14,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772502091] [2024-06-27 19:08:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:14,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:16,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:16,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772502091] [2024-06-27 19:08:16,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772502091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:16,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:16,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:16,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920101834] [2024-06-27 19:08:16,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:16,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:16,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:16,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:17,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:17,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 220 transitions, 2255 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:17,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:17,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:17,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:19,897 INFO L124 PetriNetUnfolderBase]: 6504/9900 cut-off events. [2024-06-27 19:08:19,897 INFO L125 PetriNetUnfolderBase]: For 233128/233128 co-relation queries the response was YES. [2024-06-27 19:08:19,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51738 conditions, 9900 events. 6504/9900 cut-off events. For 233128/233128 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60019 event pairs, 1600 based on Foata normal form. 16/9890 useless extension candidates. Maximal degree in co-relation 51662. Up to 8228 conditions per place. [2024-06-27 19:08:19,983 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 207 selfloop transitions, 89 changer transitions 0/303 dead transitions. [2024-06-27 19:08:19,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 303 transitions, 3171 flow [2024-06-27 19:08:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:08:19,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:08:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-27 19:08:19,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-27 19:08:19,985 INFO L175 Difference]: Start difference. First operand has 166 places, 220 transitions, 2255 flow. Second operand 10 states and 254 transitions. [2024-06-27 19:08:19,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 303 transitions, 3171 flow [2024-06-27 19:08:20,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 303 transitions, 2969 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 19:08:20,406 INFO L231 Difference]: Finished difference. Result has 168 places, 222 transitions, 2328 flow [2024-06-27 19:08:20,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2328, PETRI_PLACES=168, PETRI_TRANSITIONS=222} [2024-06-27 19:08:20,407 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 116 predicate places. [2024-06-27 19:08:20,407 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 222 transitions, 2328 flow [2024-06-27 19:08:20,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:20,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:20,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:20,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:08:20,407 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:20,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash -134986982, now seen corresponding path program 2 times [2024-06-27 19:08:20,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:20,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155706727] [2024-06-27 19:08:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:20,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:23,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:23,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155706727] [2024-06-27 19:08:23,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155706727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:23,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:23,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:23,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978501950] [2024-06-27 19:08:23,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:23,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:23,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:23,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:23,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 222 transitions, 2328 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:23,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:23,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:23,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:26,118 INFO L124 PetriNetUnfolderBase]: 6610/10103 cut-off events. [2024-06-27 19:08:26,119 INFO L125 PetriNetUnfolderBase]: For 251801/251813 co-relation queries the response was YES. [2024-06-27 19:08:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53294 conditions, 10103 events. 6610/10103 cut-off events. For 251801/251813 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 61958 event pairs, 1539 based on Foata normal form. 20/10105 useless extension candidates. Maximal degree in co-relation 53217. Up to 8434 conditions per place. [2024-06-27 19:08:26,201 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 196 selfloop transitions, 84 changer transitions 0/287 dead transitions. [2024-06-27 19:08:26,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 287 transitions, 3174 flow [2024-06-27 19:08:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:08:26,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-27 19:08:26,204 INFO L175 Difference]: Start difference. First operand has 168 places, 222 transitions, 2328 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:08:26,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 287 transitions, 3174 flow [2024-06-27 19:08:26,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 287 transitions, 2917 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 19:08:26,551 INFO L231 Difference]: Finished difference. Result has 168 places, 224 transitions, 2340 flow [2024-06-27 19:08:26,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2340, PETRI_PLACES=168, PETRI_TRANSITIONS=224} [2024-06-27 19:08:26,551 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 116 predicate places. [2024-06-27 19:08:26,552 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 224 transitions, 2340 flow [2024-06-27 19:08:26,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:26,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:26,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:26,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:08:26,552 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:26,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:26,552 INFO L85 PathProgramCache]: Analyzing trace with hash -41157720, now seen corresponding path program 3 times [2024-06-27 19:08:26,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:26,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775863136] [2024-06-27 19:08:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:26,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:29,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:29,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775863136] [2024-06-27 19:08:29,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775863136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:29,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:29,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:08:29,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901468014] [2024-06-27 19:08:29,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:29,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:08:29,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:29,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:08:29,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:08:29,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:29,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 224 transitions, 2340 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:29,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:29,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:32,272 INFO L124 PetriNetUnfolderBase]: 6590/10091 cut-off events. [2024-06-27 19:08:32,272 INFO L125 PetriNetUnfolderBase]: For 241578/241590 co-relation queries the response was YES. [2024-06-27 19:08:32,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51889 conditions, 10091 events. 6590/10091 cut-off events. For 241578/241590 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 61921 event pairs, 1402 based on Foata normal form. 20/10093 useless extension candidates. Maximal degree in co-relation 51811. Up to 6972 conditions per place. [2024-06-27 19:08:32,368 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 177 selfloop transitions, 102 changer transitions 0/286 dead transitions. [2024-06-27 19:08:32,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 286 transitions, 3104 flow [2024-06-27 19:08:32,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:08:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:08:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:08:32,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 19:08:32,370 INFO L175 Difference]: Start difference. First operand has 168 places, 224 transitions, 2340 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:08:32,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 286 transitions, 3104 flow [2024-06-27 19:08:32,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 286 transitions, 2861 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:32,809 INFO L231 Difference]: Finished difference. Result has 169 places, 225 transitions, 2332 flow [2024-06-27 19:08:32,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2332, PETRI_PLACES=169, PETRI_TRANSITIONS=225} [2024-06-27 19:08:32,810 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 117 predicate places. [2024-06-27 19:08:32,810 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 225 transitions, 2332 flow [2024-06-27 19:08:32,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:32,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:32,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:32,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:08:32,810 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:32,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:32,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1063835766, now seen corresponding path program 2 times [2024-06-27 19:08:32,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:32,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238097124] [2024-06-27 19:08:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:32,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:35,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:35,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238097124] [2024-06-27 19:08:35,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238097124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:35,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:35,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:08:35,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379408986] [2024-06-27 19:08:35,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:35,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:08:35,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:35,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:08:35,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:08:35,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:35,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 225 transitions, 2332 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:35,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:35,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:35,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:37,542 INFO L124 PetriNetUnfolderBase]: 6682/10311 cut-off events. [2024-06-27 19:08:37,542 INFO L125 PetriNetUnfolderBase]: For 240655/240655 co-relation queries the response was YES. [2024-06-27 19:08:37,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52640 conditions, 10311 events. 6682/10311 cut-off events. For 240655/240655 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 63872 event pairs, 1720 based on Foata normal form. 4/10313 useless extension candidates. Maximal degree in co-relation 52561. Up to 9564 conditions per place. [2024-06-27 19:08:37,635 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 242 selfloop transitions, 17 changer transitions 0/266 dead transitions. [2024-06-27 19:08:37,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 266 transitions, 3116 flow [2024-06-27 19:08:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:08:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:08:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:08:37,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 19:08:37,637 INFO L175 Difference]: Start difference. First operand has 169 places, 225 transitions, 2332 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:08:37,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 266 transitions, 3116 flow [2024-06-27 19:08:37,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 266 transitions, 2833 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:37,949 INFO L231 Difference]: Finished difference. Result has 170 places, 228 transitions, 2123 flow [2024-06-27 19:08:37,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2123, PETRI_PLACES=170, PETRI_TRANSITIONS=228} [2024-06-27 19:08:37,949 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-27 19:08:37,949 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 228 transitions, 2123 flow [2024-06-27 19:08:37,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:37,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:37,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:37,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:08:37,950 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:37,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1064281236, now seen corresponding path program 3 times [2024-06-27 19:08:37,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:37,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918328509] [2024-06-27 19:08:37,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:37,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:40,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:40,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918328509] [2024-06-27 19:08:40,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918328509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:40,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:40,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:08:40,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461766367] [2024-06-27 19:08:40,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:40,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:08:40,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:40,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:08:40,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:08:40,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:08:40,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 228 transitions, 2123 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:40,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:40,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:08:40,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:42,738 INFO L124 PetriNetUnfolderBase]: 6670/10267 cut-off events. [2024-06-27 19:08:42,738 INFO L125 PetriNetUnfolderBase]: For 230631/230631 co-relation queries the response was YES. [2024-06-27 19:08:42,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50815 conditions, 10267 events. 6670/10267 cut-off events. For 230631/230631 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 63364 event pairs, 1693 based on Foata normal form. 4/10261 useless extension candidates. Maximal degree in co-relation 50735. Up to 9236 conditions per place. [2024-06-27 19:08:42,837 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 231 selfloop transitions, 34 changer transitions 0/272 dead transitions. [2024-06-27 19:08:42,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 272 transitions, 2935 flow [2024-06-27 19:08:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:08:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:08:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:08:42,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-27 19:08:42,838 INFO L175 Difference]: Start difference. First operand has 170 places, 228 transitions, 2123 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:08:42,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 272 transitions, 2935 flow [2024-06-27 19:08:43,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 272 transitions, 2867 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:08:43,206 INFO L231 Difference]: Finished difference. Result has 170 places, 228 transitions, 2129 flow [2024-06-27 19:08:43,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2129, PETRI_PLACES=170, PETRI_TRANSITIONS=228} [2024-06-27 19:08:43,206 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-27 19:08:43,206 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 228 transitions, 2129 flow [2024-06-27 19:08:43,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:43,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:43,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:43,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:08:43,207 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:43,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1117557098, now seen corresponding path program 1 times [2024-06-27 19:08:43,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:43,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901908186] [2024-06-27 19:08:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:43,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:45,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:45,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901908186] [2024-06-27 19:08:45,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901908186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:45,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:45,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:08:45,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587939595] [2024-06-27 19:08:45,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:45,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:08:45,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:45,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:08:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:08:45,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:08:45,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 228 transitions, 2129 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:45,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:45,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:08:45,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:47,313 INFO L124 PetriNetUnfolderBase]: 6289/9903 cut-off events. [2024-06-27 19:08:47,313 INFO L125 PetriNetUnfolderBase]: For 203068/203072 co-relation queries the response was YES. [2024-06-27 19:08:47,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47834 conditions, 9903 events. 6289/9903 cut-off events. For 203068/203072 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 63303 event pairs, 1457 based on Foata normal form. 7/9882 useless extension candidates. Maximal degree in co-relation 47755. Up to 8627 conditions per place. [2024-06-27 19:08:47,402 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 229 selfloop transitions, 31 changer transitions 0/271 dead transitions. [2024-06-27 19:08:47,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 271 transitions, 3054 flow [2024-06-27 19:08:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:08:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:08:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:08:47,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 19:08:47,403 INFO L175 Difference]: Start difference. First operand has 170 places, 228 transitions, 2129 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:08:47,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 271 transitions, 3054 flow [2024-06-27 19:08:47,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 271 transitions, 2959 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:08:47,744 INFO L231 Difference]: Finished difference. Result has 171 places, 232 transitions, 2202 flow [2024-06-27 19:08:47,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2202, PETRI_PLACES=171, PETRI_TRANSITIONS=232} [2024-06-27 19:08:47,745 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 119 predicate places. [2024-06-27 19:08:47,745 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 232 transitions, 2202 flow [2024-06-27 19:08:47,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:47,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:47,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:47,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:08:47,745 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:47,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1445246258, now seen corresponding path program 2 times [2024-06-27 19:08:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953745689] [2024-06-27 19:08:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:47,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:49,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:49,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953745689] [2024-06-27 19:08:49,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953745689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:49,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:49,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:08:49,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531304721] [2024-06-27 19:08:49,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:49,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:08:49,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:49,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:08:49,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:08:49,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:08:49,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 232 transitions, 2202 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:49,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:49,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:08:49,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:52,358 INFO L124 PetriNetUnfolderBase]: 6300/9918 cut-off events. [2024-06-27 19:08:52,358 INFO L125 PetriNetUnfolderBase]: For 204784/204785 co-relation queries the response was YES. [2024-06-27 19:08:52,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48134 conditions, 9918 events. 6300/9918 cut-off events. For 204784/204785 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 63341 event pairs, 1518 based on Foata normal form. 5/9893 useless extension candidates. Maximal degree in co-relation 48053. Up to 8635 conditions per place. [2024-06-27 19:08:52,448 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 231 selfloop transitions, 39 changer transitions 0/281 dead transitions. [2024-06-27 19:08:52,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 281 transitions, 3124 flow [2024-06-27 19:08:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:08:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:08:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:08:52,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-27 19:08:52,450 INFO L175 Difference]: Start difference. First operand has 171 places, 232 transitions, 2202 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:08:52,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 281 transitions, 3124 flow [2024-06-27 19:08:52,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 281 transitions, 3034 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:52,836 INFO L231 Difference]: Finished difference. Result has 174 places, 236 transitions, 2289 flow [2024-06-27 19:08:52,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2289, PETRI_PLACES=174, PETRI_TRANSITIONS=236} [2024-06-27 19:08:52,836 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-27 19:08:52,836 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 236 transitions, 2289 flow [2024-06-27 19:08:52,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:52,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:52,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:52,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:08:52,837 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:52,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash -648481708, now seen corresponding path program 3 times [2024-06-27 19:08:52,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:52,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764202157] [2024-06-27 19:08:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:52,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:08:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:08:54,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:08:54,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764202157] [2024-06-27 19:08:54,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764202157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:08:54,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:08:54,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:08:54,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122444592] [2024-06-27 19:08:54,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:08:54,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:08:54,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:08:54,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:08:54,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:08:54,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:08:54,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 236 transitions, 2289 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:54,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:08:54,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:08:54,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:08:56,796 INFO L124 PetriNetUnfolderBase]: 6193/9793 cut-off events. [2024-06-27 19:08:56,796 INFO L125 PetriNetUnfolderBase]: For 204653/204654 co-relation queries the response was YES. [2024-06-27 19:08:56,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47388 conditions, 9793 events. 6193/9793 cut-off events. For 204653/204654 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 62672 event pairs, 1515 based on Foata normal form. 5/9769 useless extension candidates. Maximal degree in co-relation 47307. Up to 8822 conditions per place. [2024-06-27 19:08:56,879 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 241 selfloop transitions, 21 changer transitions 0/273 dead transitions. [2024-06-27 19:08:56,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 273 transitions, 2951 flow [2024-06-27 19:08:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:08:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:08:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:08:56,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-27 19:08:56,881 INFO L175 Difference]: Start difference. First operand has 174 places, 236 transitions, 2289 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:08:56,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 273 transitions, 2951 flow [2024-06-27 19:08:57,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 273 transitions, 2815 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 19:08:57,193 INFO L231 Difference]: Finished difference. Result has 177 places, 236 transitions, 2202 flow [2024-06-27 19:08:57,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2202, PETRI_PLACES=177, PETRI_TRANSITIONS=236} [2024-06-27 19:08:57,194 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 125 predicate places. [2024-06-27 19:08:57,194 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 236 transitions, 2202 flow [2024-06-27 19:08:57,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:08:57,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:08:57,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:08:57,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:08:57,195 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:08:57,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:08:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1063819894, now seen corresponding path program 1 times [2024-06-27 19:08:57,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:08:57,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397768345] [2024-06-27 19:08:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:08:57,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:08:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:00,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397768345] [2024-06-27 19:09:00,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397768345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:00,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:00,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:00,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871221210] [2024-06-27 19:09:00,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:00,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:00,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:00,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:00,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:00,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:00,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 236 transitions, 2202 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:00,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:00,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:00,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:03,190 INFO L124 PetriNetUnfolderBase]: 6797/10512 cut-off events. [2024-06-27 19:09:03,190 INFO L125 PetriNetUnfolderBase]: For 243712/243712 co-relation queries the response was YES. [2024-06-27 19:09:03,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51720 conditions, 10512 events. 6797/10512 cut-off events. For 243712/243712 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 65494 event pairs, 1794 based on Foata normal form. 2/10512 useless extension candidates. Maximal degree in co-relation 51637. Up to 9767 conditions per place. [2024-06-27 19:09:03,272 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 252 selfloop transitions, 16 changer transitions 0/275 dead transitions. [2024-06-27 19:09:03,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 275 transitions, 2998 flow [2024-06-27 19:09:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:09:03,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 19:09:03,273 INFO L175 Difference]: Start difference. First operand has 177 places, 236 transitions, 2202 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:09:03,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 275 transitions, 2998 flow [2024-06-27 19:09:03,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 275 transitions, 2918 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 19:09:03,737 INFO L231 Difference]: Finished difference. Result has 178 places, 238 transitions, 2189 flow [2024-06-27 19:09:03,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2189, PETRI_PLACES=178, PETRI_TRANSITIONS=238} [2024-06-27 19:09:03,737 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 126 predicate places. [2024-06-27 19:09:03,737 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 238 transitions, 2189 flow [2024-06-27 19:09:03,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:03,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:03,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:03,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:09:03,738 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:03,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 610741591, now seen corresponding path program 1 times [2024-06-27 19:09:03,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:03,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302582729] [2024-06-27 19:09:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:03,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:05,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:05,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302582729] [2024-06-27 19:09:05,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302582729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:05,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:05,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197879467] [2024-06-27 19:09:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:05,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:05,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 238 transitions, 2189 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:05,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:05,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:05,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:08,398 INFO L124 PetriNetUnfolderBase]: 6851/10498 cut-off events. [2024-06-27 19:09:08,398 INFO L125 PetriNetUnfolderBase]: For 252773/252773 co-relation queries the response was YES. [2024-06-27 19:09:08,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52457 conditions, 10498 events. 6851/10498 cut-off events. For 252773/252773 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 64410 event pairs, 1581 based on Foata normal form. 1/10494 useless extension candidates. Maximal degree in co-relation 52373. Up to 9083 conditions per place. [2024-06-27 19:09:08,482 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 263 selfloop transitions, 57 changer transitions 0/327 dead transitions. [2024-06-27 19:09:08,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 327 transitions, 3820 flow [2024-06-27 19:09:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:09:08,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-27 19:09:08,483 INFO L175 Difference]: Start difference. First operand has 178 places, 238 transitions, 2189 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:09:08,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 327 transitions, 3820 flow [2024-06-27 19:09:09,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 327 transitions, 3781 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:09,029 INFO L231 Difference]: Finished difference. Result has 183 places, 265 transitions, 2703 flow [2024-06-27 19:09:09,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2703, PETRI_PLACES=183, PETRI_TRANSITIONS=265} [2024-06-27 19:09:09,029 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 131 predicate places. [2024-06-27 19:09:09,029 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 265 transitions, 2703 flow [2024-06-27 19:09:09,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:09,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:09,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:09,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:09:09,030 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:09,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1363687081, now seen corresponding path program 2 times [2024-06-27 19:09:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:09,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128104241] [2024-06-27 19:09:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:11,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:11,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128104241] [2024-06-27 19:09:11,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128104241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:11,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:11,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:11,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529490592] [2024-06-27 19:09:11,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:11,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:11,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:11,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:11,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 265 transitions, 2703 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:11,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:11,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:11,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:14,019 INFO L124 PetriNetUnfolderBase]: 7001/10774 cut-off events. [2024-06-27 19:09:14,019 INFO L125 PetriNetUnfolderBase]: For 277208/277208 co-relation queries the response was YES. [2024-06-27 19:09:14,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56731 conditions, 10774 events. 7001/10774 cut-off events. For 277208/277208 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 66802 event pairs, 1756 based on Foata normal form. 2/10774 useless extension candidates. Maximal degree in co-relation 56643. Up to 9852 conditions per place. [2024-06-27 19:09:14,110 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 284 selfloop transitions, 43 changer transitions 0/334 dead transitions. [2024-06-27 19:09:14,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 334 transitions, 4010 flow [2024-06-27 19:09:14,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:09:14,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-27 19:09:14,111 INFO L175 Difference]: Start difference. First operand has 183 places, 265 transitions, 2703 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:09:14,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 334 transitions, 4010 flow [2024-06-27 19:09:14,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 334 transitions, 3966 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 19:09:14,776 INFO L231 Difference]: Finished difference. Result has 191 places, 279 transitions, 3034 flow [2024-06-27 19:09:14,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3034, PETRI_PLACES=191, PETRI_TRANSITIONS=279} [2024-06-27 19:09:14,777 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 139 predicate places. [2024-06-27 19:09:14,777 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 279 transitions, 3034 flow [2024-06-27 19:09:14,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:14,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:14,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:14,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:09:14,778 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:14,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:14,778 INFO L85 PathProgramCache]: Analyzing trace with hash -293199425, now seen corresponding path program 3 times [2024-06-27 19:09:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:14,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245805554] [2024-06-27 19:09:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:16,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245805554] [2024-06-27 19:09:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245805554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:16,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:16,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:16,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224467467] [2024-06-27 19:09:16,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:16,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:16,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:16,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:16,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 279 transitions, 3034 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:16,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:16,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:16,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:19,538 INFO L124 PetriNetUnfolderBase]: 7024/10727 cut-off events. [2024-06-27 19:09:19,538 INFO L125 PetriNetUnfolderBase]: For 300053/300053 co-relation queries the response was YES. [2024-06-27 19:09:19,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59032 conditions, 10727 events. 7024/10727 cut-off events. For 300053/300053 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 65643 event pairs, 1656 based on Foata normal form. 1/10711 useless extension candidates. Maximal degree in co-relation 58940. Up to 9261 conditions per place. [2024-06-27 19:09:19,679 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 270 selfloop transitions, 71 changer transitions 0/348 dead transitions. [2024-06-27 19:09:19,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 348 transitions, 4772 flow [2024-06-27 19:09:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:09:19,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-27 19:09:19,680 INFO L175 Difference]: Start difference. First operand has 191 places, 279 transitions, 3034 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:09:19,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 348 transitions, 4772 flow [2024-06-27 19:09:20,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 348 transitions, 4533 flow, removed 100 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:20,396 INFO L231 Difference]: Finished difference. Result has 196 places, 290 transitions, 3267 flow [2024-06-27 19:09:20,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3267, PETRI_PLACES=196, PETRI_TRANSITIONS=290} [2024-06-27 19:09:20,396 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-06-27 19:09:20,396 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 290 transitions, 3267 flow [2024-06-27 19:09:20,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:20,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:20,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:20,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:09:20,397 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:20,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:20,397 INFO L85 PathProgramCache]: Analyzing trace with hash -280819265, now seen corresponding path program 4 times [2024-06-27 19:09:20,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:20,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192410940] [2024-06-27 19:09:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:20,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:22,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192410940] [2024-06-27 19:09:22,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192410940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:22,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:22,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:22,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72101262] [2024-06-27 19:09:22,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:22,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:22,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:22,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:22,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:22,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 290 transitions, 3267 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:22,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:22,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:22,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:25,357 INFO L124 PetriNetUnfolderBase]: 7047/10778 cut-off events. [2024-06-27 19:09:25,357 INFO L125 PetriNetUnfolderBase]: For 312803/312803 co-relation queries the response was YES. [2024-06-27 19:09:25,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60358 conditions, 10778 events. 7047/10778 cut-off events. For 312803/312803 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 66133 event pairs, 1652 based on Foata normal form. 1/10762 useless extension candidates. Maximal degree in co-relation 60262. Up to 9277 conditions per place. [2024-06-27 19:09:25,475 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 262 selfloop transitions, 77 changer transitions 0/346 dead transitions. [2024-06-27 19:09:25,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 346 transitions, 4689 flow [2024-06-27 19:09:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:09:25,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-27 19:09:25,476 INFO L175 Difference]: Start difference. First operand has 196 places, 290 transitions, 3267 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:09:25,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 346 transitions, 4689 flow [2024-06-27 19:09:26,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 346 transitions, 4637 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-27 19:09:26,075 INFO L231 Difference]: Finished difference. Result has 202 places, 294 transitions, 3448 flow [2024-06-27 19:09:26,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3448, PETRI_PLACES=202, PETRI_TRANSITIONS=294} [2024-06-27 19:09:26,075 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 150 predicate places. [2024-06-27 19:09:26,076 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 294 transitions, 3448 flow [2024-06-27 19:09:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:26,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:26,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:26,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:09:26,076 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:26,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1365230627, now seen corresponding path program 5 times [2024-06-27 19:09:26,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:26,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501176127] [2024-06-27 19:09:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:28,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:28,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501176127] [2024-06-27 19:09:28,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501176127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:28,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:28,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:28,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58717653] [2024-06-27 19:09:28,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:28,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:28,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:28,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:28,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:28,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:28,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 294 transitions, 3448 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:28,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:28,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:28,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:30,909 INFO L124 PetriNetUnfolderBase]: 7181/11046 cut-off events. [2024-06-27 19:09:30,909 INFO L125 PetriNetUnfolderBase]: For 327828/327828 co-relation queries the response was YES. [2024-06-27 19:09:30,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62639 conditions, 11046 events. 7181/11046 cut-off events. For 327828/327828 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 68840 event pairs, 1772 based on Foata normal form. 2/11038 useless extension candidates. Maximal degree in co-relation 62540. Up to 9923 conditions per place. [2024-06-27 19:09:31,017 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 299 selfloop transitions, 64 changer transitions 0/370 dead transitions. [2024-06-27 19:09:31,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 370 transitions, 5068 flow [2024-06-27 19:09:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:09:31,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:09:31,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-27 19:09:31,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:09:31,018 INFO L175 Difference]: Start difference. First operand has 202 places, 294 transitions, 3448 flow. Second operand 9 states and 216 transitions. [2024-06-27 19:09:31,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 370 transitions, 5068 flow [2024-06-27 19:09:31,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 370 transitions, 4904 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:31,755 INFO L231 Difference]: Finished difference. Result has 210 places, 314 transitions, 3863 flow [2024-06-27 19:09:31,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3863, PETRI_PLACES=210, PETRI_TRANSITIONS=314} [2024-06-27 19:09:31,756 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 158 predicate places. [2024-06-27 19:09:31,756 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 314 transitions, 3863 flow [2024-06-27 19:09:31,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:31,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:31,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:31,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:09:31,756 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:31,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash -685510331, now seen corresponding path program 6 times [2024-06-27 19:09:31,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:31,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345239673] [2024-06-27 19:09:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:34,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:34,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345239673] [2024-06-27 19:09:34,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345239673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:34,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:34,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:34,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736512930] [2024-06-27 19:09:34,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:34,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:34,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:34,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:34,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:34,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:34,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 314 transitions, 3863 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:34,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:34,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:34,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:36,742 INFO L124 PetriNetUnfolderBase]: 7178/11028 cut-off events. [2024-06-27 19:09:36,742 INFO L125 PetriNetUnfolderBase]: For 347949/347949 co-relation queries the response was YES. [2024-06-27 19:09:36,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64290 conditions, 11028 events. 7178/11028 cut-off events. For 347949/347949 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 68596 event pairs, 1758 based on Foata normal form. 1/11019 useless extension candidates. Maximal degree in co-relation 64188. Up to 9921 conditions per place. [2024-06-27 19:09:36,862 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 287 selfloop transitions, 67 changer transitions 0/361 dead transitions. [2024-06-27 19:09:36,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 361 transitions, 4970 flow [2024-06-27 19:09:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:09:36,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-27 19:09:36,864 INFO L175 Difference]: Start difference. First operand has 210 places, 314 transitions, 3863 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:09:36,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 361 transitions, 4970 flow [2024-06-27 19:09:37,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 361 transitions, 4688 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-27 19:09:37,526 INFO L231 Difference]: Finished difference. Result has 213 places, 316 transitions, 3811 flow [2024-06-27 19:09:37,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3611, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3811, PETRI_PLACES=213, PETRI_TRANSITIONS=316} [2024-06-27 19:09:37,526 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 161 predicate places. [2024-06-27 19:09:37,527 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 316 transitions, 3811 flow [2024-06-27 19:09:37,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:37,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:37,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:37,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:09:37,527 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:37,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1260749595, now seen corresponding path program 1 times [2024-06-27 19:09:37,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:37,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147569944] [2024-06-27 19:09:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:39,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:39,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147569944] [2024-06-27 19:09:39,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147569944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:39,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:39,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:09:39,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178012854] [2024-06-27 19:09:39,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:39,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:09:39,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:39,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:09:39,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:09:39,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:39,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 316 transitions, 3811 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:39,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:39,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:39,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:42,592 INFO L124 PetriNetUnfolderBase]: 7338/11216 cut-off events. [2024-06-27 19:09:42,592 INFO L125 PetriNetUnfolderBase]: For 364290/364294 co-relation queries the response was YES. [2024-06-27 19:09:42,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65285 conditions, 11216 events. 7338/11216 cut-off events. For 364290/364294 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 69179 event pairs, 1585 based on Foata normal form. 6/11217 useless extension candidates. Maximal degree in co-relation 65182. Up to 9563 conditions per place. [2024-06-27 19:09:42,703 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 289 selfloop transitions, 93 changer transitions 0/389 dead transitions. [2024-06-27 19:09:42,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 389 transitions, 5586 flow [2024-06-27 19:09:42,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:09:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:09:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:09:42,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-27 19:09:42,704 INFO L175 Difference]: Start difference. First operand has 213 places, 316 transitions, 3811 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:09:42,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 389 transitions, 5586 flow [2024-06-27 19:09:43,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 389 transitions, 5389 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 19:09:43,414 INFO L231 Difference]: Finished difference. Result has 217 places, 326 transitions, 4037 flow [2024-06-27 19:09:43,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4037, PETRI_PLACES=217, PETRI_TRANSITIONS=326} [2024-06-27 19:09:43,415 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 165 predicate places. [2024-06-27 19:09:43,415 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 326 transitions, 4037 flow [2024-06-27 19:09:43,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:43,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:43,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:43,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:09:43,415 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:43,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2035410031, now seen corresponding path program 1 times [2024-06-27 19:09:43,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:43,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25908951] [2024-06-27 19:09:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:43,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:45,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:45,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25908951] [2024-06-27 19:09:45,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25908951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:45,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:45,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092148531] [2024-06-27 19:09:45,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:45,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:45,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:45,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:45,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 326 transitions, 4037 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:45,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:45,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:45,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:49,344 INFO L124 PetriNetUnfolderBase]: 7436/11401 cut-off events. [2024-06-27 19:09:49,344 INFO L125 PetriNetUnfolderBase]: For 384633/384633 co-relation queries the response was YES. [2024-06-27 19:09:49,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67446 conditions, 11401 events. 7436/11401 cut-off events. For 384633/384633 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70720 event pairs, 1766 based on Foata normal form. 2/11398 useless extension candidates. Maximal degree in co-relation 67341. Up to 8667 conditions per place. [2024-06-27 19:09:49,456 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 301 selfloop transitions, 104 changer transitions 0/412 dead transitions. [2024-06-27 19:09:49,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 412 transitions, 5918 flow [2024-06-27 19:09:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:09:49,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-27 19:09:49,457 INFO L175 Difference]: Start difference. First operand has 217 places, 326 transitions, 4037 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:09:49,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 412 transitions, 5918 flow [2024-06-27 19:09:50,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 412 transitions, 5768 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:50,401 INFO L231 Difference]: Finished difference. Result has 224 places, 341 transitions, 4405 flow [2024-06-27 19:09:50,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3887, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4405, PETRI_PLACES=224, PETRI_TRANSITIONS=341} [2024-06-27 19:09:50,401 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 172 predicate places. [2024-06-27 19:09:50,401 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 341 transitions, 4405 flow [2024-06-27 19:09:50,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:50,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:50,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:50,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:09:50,402 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:50,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:50,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2035410217, now seen corresponding path program 2 times [2024-06-27 19:09:50,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:50,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14648859] [2024-06-27 19:09:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:50,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:52,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:52,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14648859] [2024-06-27 19:09:52,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14648859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:52,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:52,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046464905] [2024-06-27 19:09:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:52,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:52,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:52,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:52,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:52,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 341 transitions, 4405 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:52,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:52,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:52,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:09:56,216 INFO L124 PetriNetUnfolderBase]: 7482/11411 cut-off events. [2024-06-27 19:09:56,216 INFO L125 PetriNetUnfolderBase]: For 410845/410845 co-relation queries the response was YES. [2024-06-27 19:09:56,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70529 conditions, 11411 events. 7482/11411 cut-off events. For 410845/410845 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70395 event pairs, 1602 based on Foata normal form. 2/11408 useless extension candidates. Maximal degree in co-relation 70421. Up to 9735 conditions per place. [2024-06-27 19:09:56,357 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 309 selfloop transitions, 94 changer transitions 0/410 dead transitions. [2024-06-27 19:09:56,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 410 transitions, 5946 flow [2024-06-27 19:09:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:09:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:09:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:09:56,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286458333333334 [2024-06-27 19:09:56,359 INFO L175 Difference]: Start difference. First operand has 224 places, 341 transitions, 4405 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:09:56,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 410 transitions, 5946 flow [2024-06-27 19:09:57,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 410 transitions, 5860 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:09:57,385 INFO L231 Difference]: Finished difference. Result has 229 places, 345 transitions, 4629 flow [2024-06-27 19:09:57,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4629, PETRI_PLACES=229, PETRI_TRANSITIONS=345} [2024-06-27 19:09:57,386 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 177 predicate places. [2024-06-27 19:09:57,386 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 345 transitions, 4629 flow [2024-06-27 19:09:57,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:57,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:09:57,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:09:57,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:09:57,386 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:09:57,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:09:57,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1858041361, now seen corresponding path program 2 times [2024-06-27 19:09:57,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:09:57,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588971601] [2024-06-27 19:09:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:09:57,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:09:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:09:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:09:59,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:09:59,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588971601] [2024-06-27 19:09:59,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588971601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:09:59,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:09:59,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:09:59,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857650846] [2024-06-27 19:09:59,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:09:59,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:09:59,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:09:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:09:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:09:59,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:09:59,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 345 transitions, 4629 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:09:59,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:09:59,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:09:59,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:03,331 INFO L124 PetriNetUnfolderBase]: 7886/12001 cut-off events. [2024-06-27 19:10:03,331 INFO L125 PetriNetUnfolderBase]: For 458271/458271 co-relation queries the response was YES. [2024-06-27 19:10:03,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76420 conditions, 12001 events. 7886/12001 cut-off events. For 458271/458271 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74127 event pairs, 1737 based on Foata normal form. 4/12003 useless extension candidates. Maximal degree in co-relation 76310. Up to 10421 conditions per place. [2024-06-27 19:10:03,481 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 361 selfloop transitions, 72 changer transitions 0/440 dead transitions. [2024-06-27 19:10:03,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 440 transitions, 6628 flow [2024-06-27 19:10:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:10:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:10:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-27 19:10:03,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-27 19:10:03,482 INFO L175 Difference]: Start difference. First operand has 229 places, 345 transitions, 4629 flow. Second operand 10 states and 251 transitions. [2024-06-27 19:10:03,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 440 transitions, 6628 flow [2024-06-27 19:10:04,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 440 transitions, 6380 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 19:10:04,675 INFO L231 Difference]: Finished difference. Result has 235 places, 361 transitions, 4914 flow [2024-06-27 19:10:04,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4385, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4914, PETRI_PLACES=235, PETRI_TRANSITIONS=361} [2024-06-27 19:10:04,675 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 183 predicate places. [2024-06-27 19:10:04,675 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 361 transitions, 4914 flow [2024-06-27 19:10:04,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:04,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:04,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:04,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:10:04,676 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:04,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2030768401, now seen corresponding path program 3 times [2024-06-27 19:10:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:04,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37651852] [2024-06-27 19:10:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:04,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:07,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:07,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37651852] [2024-06-27 19:10:07,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37651852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:07,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:07,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:10:07,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968356211] [2024-06-27 19:10:07,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:07,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:10:07,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:10:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:10:07,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:07,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 361 transitions, 4914 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:07,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:07,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:07,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:10,378 INFO L124 PetriNetUnfolderBase]: 7874/11993 cut-off events. [2024-06-27 19:10:10,378 INFO L125 PetriNetUnfolderBase]: For 477715/477715 co-relation queries the response was YES. [2024-06-27 19:10:10,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77857 conditions, 11993 events. 7874/11993 cut-off events. For 477715/477715 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 74182 event pairs, 1739 based on Foata normal form. 4/11995 useless extension candidates. Maximal degree in co-relation 77745. Up to 10415 conditions per place. [2024-06-27 19:10:10,506 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 353 selfloop transitions, 75 changer transitions 0/435 dead transitions. [2024-06-27 19:10:10,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 435 transitions, 6487 flow [2024-06-27 19:10:10,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:10:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:10:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 19:10:10,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-27 19:10:10,507 INFO L175 Difference]: Start difference. First operand has 235 places, 361 transitions, 4914 flow. Second operand 9 states and 229 transitions. [2024-06-27 19:10:10,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 435 transitions, 6487 flow [2024-06-27 19:10:11,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 435 transitions, 6188 flow, removed 115 selfloop flow, removed 6 redundant places. [2024-06-27 19:10:11,986 INFO L231 Difference]: Finished difference. Result has 238 places, 366 transitions, 4949 flow [2024-06-27 19:10:11,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4641, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4949, PETRI_PLACES=238, PETRI_TRANSITIONS=366} [2024-06-27 19:10:11,987 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 186 predicate places. [2024-06-27 19:10:11,987 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 366 transitions, 4949 flow [2024-06-27 19:10:11,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:11,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:11,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:11,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:10:11,988 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:11,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:11,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1858278697, now seen corresponding path program 3 times [2024-06-27 19:10:11,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:11,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988151656] [2024-06-27 19:10:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:11,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:14,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988151656] [2024-06-27 19:10:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988151656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:14,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:14,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:14,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248280925] [2024-06-27 19:10:14,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:14,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:14,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:14,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:14,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 366 transitions, 4949 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:14,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:14,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:14,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:17,319 INFO L124 PetriNetUnfolderBase]: 7862/11921 cut-off events. [2024-06-27 19:10:17,319 INFO L125 PetriNetUnfolderBase]: For 478158/478158 co-relation queries the response was YES. [2024-06-27 19:10:17,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77196 conditions, 11921 events. 7862/11921 cut-off events. For 478158/478158 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 73836 event pairs, 1825 based on Foata normal form. 4/11923 useless extension candidates. Maximal degree in co-relation 77082. Up to 11019 conditions per place. [2024-06-27 19:10:17,460 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 370 selfloop transitions, 43 changer transitions 0/420 dead transitions. [2024-06-27 19:10:17,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 420 transitions, 6145 flow [2024-06-27 19:10:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:10:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:10:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:10:17,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 19:10:17,461 INFO L175 Difference]: Start difference. First operand has 238 places, 366 transitions, 4949 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:10:17,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 420 transitions, 6145 flow [2024-06-27 19:10:18,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 420 transitions, 5850 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-27 19:10:18,370 INFO L231 Difference]: Finished difference. Result has 240 places, 366 transitions, 4751 flow [2024-06-27 19:10:18,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4654, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4751, PETRI_PLACES=240, PETRI_TRANSITIONS=366} [2024-06-27 19:10:18,371 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 188 predicate places. [2024-06-27 19:10:18,371 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 366 transitions, 4751 flow [2024-06-27 19:10:18,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:18,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:18,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:18,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:10:18,371 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:18,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1858032433, now seen corresponding path program 1 times [2024-06-27 19:10:18,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:18,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511454821] [2024-06-27 19:10:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:18,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:22,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:22,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511454821] [2024-06-27 19:10:22,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511454821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:22,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:22,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:10:22,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516208386] [2024-06-27 19:10:22,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:22,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:10:22,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:22,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:10:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:10:22,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:22,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 366 transitions, 4751 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:22,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:22,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:22,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:25,751 INFO L124 PetriNetUnfolderBase]: 8074/12305 cut-off events. [2024-06-27 19:10:25,751 INFO L125 PetriNetUnfolderBase]: For 500926/500926 co-relation queries the response was YES. [2024-06-27 19:10:25,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78176 conditions, 12305 events. 8074/12305 cut-off events. For 500926/500926 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 76640 event pairs, 1785 based on Foata normal form. 12/12315 useless extension candidates. Maximal degree in co-relation 78061. Up to 10909 conditions per place. [2024-06-27 19:10:25,901 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 381 selfloop transitions, 45 changer transitions 0/433 dead transitions. [2024-06-27 19:10:25,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 433 transitions, 6201 flow [2024-06-27 19:10:25,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:10:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:10:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:10:25,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-27 19:10:25,902 INFO L175 Difference]: Start difference. First operand has 240 places, 366 transitions, 4751 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:10:25,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 433 transitions, 6201 flow [2024-06-27 19:10:26,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 433 transitions, 6115 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:10:26,968 INFO L231 Difference]: Finished difference. Result has 241 places, 367 transitions, 4779 flow [2024-06-27 19:10:26,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4779, PETRI_PLACES=241, PETRI_TRANSITIONS=367} [2024-06-27 19:10:26,968 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 189 predicate places. [2024-06-27 19:10:26,968 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 367 transitions, 4779 flow [2024-06-27 19:10:26,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:26,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:26,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:26,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:10:26,969 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:26,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:26,969 INFO L85 PathProgramCache]: Analyzing trace with hash -499245165, now seen corresponding path program 4 times [2024-06-27 19:10:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:26,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438809207] [2024-06-27 19:10:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:26,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:29,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:29,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438809207] [2024-06-27 19:10:29,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438809207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:29,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:29,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:10:29,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562647378] [2024-06-27 19:10:29,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:29,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:10:29,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:10:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:10:29,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:29,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 367 transitions, 4779 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:29,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:29,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:29,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:33,028 INFO L124 PetriNetUnfolderBase]: 8120/12383 cut-off events. [2024-06-27 19:10:33,028 INFO L125 PetriNetUnfolderBase]: For 502595/502595 co-relation queries the response was YES. [2024-06-27 19:10:33,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79420 conditions, 12383 events. 8120/12383 cut-off events. For 502595/502595 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 77122 event pairs, 2054 based on Foata normal form. 2/12368 useless extension candidates. Maximal degree in co-relation 79304. Up to 9396 conditions per place. [2024-06-27 19:10:33,172 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 312 selfloop transitions, 125 changer transitions 0/444 dead transitions. [2024-06-27 19:10:33,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 444 transitions, 6852 flow [2024-06-27 19:10:33,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:10:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:10:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:10:33,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-27 19:10:33,174 INFO L175 Difference]: Start difference. First operand has 241 places, 367 transitions, 4779 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:10:33,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 444 transitions, 6852 flow [2024-06-27 19:10:34,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 444 transitions, 6760 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 19:10:34,425 INFO L231 Difference]: Finished difference. Result has 243 places, 373 transitions, 5091 flow [2024-06-27 19:10:34,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5091, PETRI_PLACES=243, PETRI_TRANSITIONS=373} [2024-06-27 19:10:34,425 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 191 predicate places. [2024-06-27 19:10:34,425 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 373 transitions, 5091 flow [2024-06-27 19:10:34,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:34,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:34,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:34,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:10:34,426 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:34,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash -464180297, now seen corresponding path program 4 times [2024-06-27 19:10:34,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509554324] [2024-06-27 19:10:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:36,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:36,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509554324] [2024-06-27 19:10:36,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509554324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:36,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:36,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:10:36,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984609972] [2024-06-27 19:10:36,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:36,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:10:36,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:36,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:10:36,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:10:36,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:36,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 373 transitions, 5091 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:36,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:36,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:36,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:40,367 INFO L124 PetriNetUnfolderBase]: 8166/12385 cut-off events. [2024-06-27 19:10:40,368 INFO L125 PetriNetUnfolderBase]: For 520325/520325 co-relation queries the response was YES. [2024-06-27 19:10:40,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81101 conditions, 12385 events. 8166/12385 cut-off events. For 520325/520325 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 76495 event pairs, 1861 based on Foata normal form. 2/12370 useless extension candidates. Maximal degree in co-relation 80984. Up to 10660 conditions per place. [2024-06-27 19:10:40,521 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 331 selfloop transitions, 102 changer transitions 0/440 dead transitions. [2024-06-27 19:10:40,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 440 transitions, 6762 flow [2024-06-27 19:10:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:10:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:10:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:10:40,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130208333333334 [2024-06-27 19:10:40,526 INFO L175 Difference]: Start difference. First operand has 243 places, 373 transitions, 5091 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:10:40,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 440 transitions, 6762 flow [2024-06-27 19:10:41,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 440 transitions, 6654 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:10:42,004 INFO L231 Difference]: Finished difference. Result has 248 places, 377 transitions, 5319 flow [2024-06-27 19:10:42,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4983, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5319, PETRI_PLACES=248, PETRI_TRANSITIONS=377} [2024-06-27 19:10:42,004 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 196 predicate places. [2024-06-27 19:10:42,004 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 377 transitions, 5319 flow [2024-06-27 19:10:42,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:42,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:42,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:42,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:10:42,005 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:42,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1861083993, now seen corresponding path program 5 times [2024-06-27 19:10:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:42,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549927358] [2024-06-27 19:10:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:42,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549927358] [2024-06-27 19:10:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549927358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:44,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:44,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468542930] [2024-06-27 19:10:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:44,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:44,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:44,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:44,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 377 transitions, 5319 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:44,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:44,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:44,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:47,637 INFO L124 PetriNetUnfolderBase]: 8212/12467 cut-off events. [2024-06-27 19:10:47,638 INFO L125 PetriNetUnfolderBase]: For 542577/542589 co-relation queries the response was YES. [2024-06-27 19:10:47,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82639 conditions, 12467 events. 8212/12467 cut-off events. For 542577/542589 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 77366 event pairs, 1727 based on Foata normal form. 10/12465 useless extension candidates. Maximal degree in co-relation 82519. Up to 10700 conditions per place. [2024-06-27 19:10:47,770 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 335 selfloop transitions, 99 changer transitions 0/441 dead transitions. [2024-06-27 19:10:47,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 441 transitions, 7130 flow [2024-06-27 19:10:47,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:10:47,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-27 19:10:47,772 INFO L175 Difference]: Start difference. First operand has 248 places, 377 transitions, 5319 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:10:47,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 441 transitions, 7130 flow [2024-06-27 19:10:49,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 441 transitions, 6834 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 19:10:49,062 INFO L231 Difference]: Finished difference. Result has 250 places, 382 transitions, 5398 flow [2024-06-27 19:10:49,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5031, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5398, PETRI_PLACES=250, PETRI_TRANSITIONS=382} [2024-06-27 19:10:49,062 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 198 predicate places. [2024-06-27 19:10:49,062 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 382 transitions, 5398 flow [2024-06-27 19:10:49,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:49,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:49,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:49,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:10:49,063 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:49,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1937062705, now seen corresponding path program 6 times [2024-06-27 19:10:49,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:49,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364422634] [2024-06-27 19:10:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:49,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:51,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:51,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364422634] [2024-06-27 19:10:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364422634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:51,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:51,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:10:51,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549227990] [2024-06-27 19:10:51,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:51,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:10:51,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:10:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:10:51,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:51,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 382 transitions, 5398 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:51,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:51,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:51,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:10:54,882 INFO L124 PetriNetUnfolderBase]: 8258/12545 cut-off events. [2024-06-27 19:10:54,882 INFO L125 PetriNetUnfolderBase]: For 555387/555399 co-relation queries the response was YES. [2024-06-27 19:10:54,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83464 conditions, 12545 events. 8258/12545 cut-off events. For 555387/555399 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 78070 event pairs, 1735 based on Foata normal form. 10/12543 useless extension candidates. Maximal degree in co-relation 83342. Up to 10740 conditions per place. [2024-06-27 19:10:55,021 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 326 selfloop transitions, 105 changer transitions 0/438 dead transitions. [2024-06-27 19:10:55,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 438 transitions, 6944 flow [2024-06-27 19:10:55,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:10:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:10:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:10:55,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-27 19:10:55,022 INFO L175 Difference]: Start difference. First operand has 250 places, 382 transitions, 5398 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:10:55,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 438 transitions, 6944 flow [2024-06-27 19:10:56,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 438 transitions, 6838 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:10:56,374 INFO L231 Difference]: Finished difference. Result has 255 places, 386 transitions, 5588 flow [2024-06-27 19:10:56,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5588, PETRI_PLACES=255, PETRI_TRANSITIONS=386} [2024-06-27 19:10:56,375 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 203 predicate places. [2024-06-27 19:10:56,375 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 386 transitions, 5588 flow [2024-06-27 19:10:56,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:56,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:10:56,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:10:56,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:10:56,375 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:10:56,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:10:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1607012947, now seen corresponding path program 7 times [2024-06-27 19:10:56,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:10:56,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007232136] [2024-06-27 19:10:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:10:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:10:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:10:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:10:58,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:10:58,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007232136] [2024-06-27 19:10:58,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007232136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:10:58,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:10:58,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:10:58,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067244801] [2024-06-27 19:10:58,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:10:58,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:10:58,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:10:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:10:58,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:10:58,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:10:58,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 386 transitions, 5588 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:10:58,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:10:58,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:10:58,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:03,083 INFO L124 PetriNetUnfolderBase]: 8272/12577 cut-off events. [2024-06-27 19:11:03,083 INFO L125 PetriNetUnfolderBase]: For 566062/566062 co-relation queries the response was YES. [2024-06-27 19:11:03,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83836 conditions, 12577 events. 8272/12577 cut-off events. For 566062/566062 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 78340 event pairs, 1836 based on Foata normal form. 2/12562 useless extension candidates. Maximal degree in co-relation 83712. Up to 10755 conditions per place. [2024-06-27 19:11:03,228 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 335 selfloop transitions, 124 changer transitions 0/466 dead transitions. [2024-06-27 19:11:03,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 466 transitions, 7502 flow [2024-06-27 19:11:03,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:11:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:11:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-27 19:11:03,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2024-06-27 19:11:03,229 INFO L175 Difference]: Start difference. First operand has 255 places, 386 transitions, 5588 flow. Second operand 10 states and 239 transitions. [2024-06-27 19:11:03,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 466 transitions, 7502 flow [2024-06-27 19:11:04,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 466 transitions, 7365 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:11:04,374 INFO L231 Difference]: Finished difference. Result has 264 places, 396 transitions, 6017 flow [2024-06-27 19:11:04,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5458, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6017, PETRI_PLACES=264, PETRI_TRANSITIONS=396} [2024-06-27 19:11:04,375 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 212 predicate places. [2024-06-27 19:11:04,375 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 396 transitions, 6017 flow [2024-06-27 19:11:04,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:04,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:04,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:04,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:11:04,375 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:04,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash -626164847, now seen corresponding path program 5 times [2024-06-27 19:11:04,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:04,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426730848] [2024-06-27 19:11:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:04,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:06,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:06,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426730848] [2024-06-27 19:11:06,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426730848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:06,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:06,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:06,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078298598] [2024-06-27 19:11:06,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:06,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:06,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:06,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 396 transitions, 6017 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:06,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:06,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:06,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:10,900 INFO L124 PetriNetUnfolderBase]: 8370/12793 cut-off events. [2024-06-27 19:11:10,900 INFO L125 PetriNetUnfolderBase]: For 606199/606199 co-relation queries the response was YES. [2024-06-27 19:11:11,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86422 conditions, 12793 events. 8370/12793 cut-off events. For 606199/606199 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 80320 event pairs, 2116 based on Foata normal form. 2/12778 useless extension candidates. Maximal degree in co-relation 86295. Up to 9528 conditions per place. [2024-06-27 19:11:11,133 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 319 selfloop transitions, 142 changer transitions 0/468 dead transitions. [2024-06-27 19:11:11,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 468 transitions, 8112 flow [2024-06-27 19:11:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:11:11,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286458333333334 [2024-06-27 19:11:11,135 INFO L175 Difference]: Start difference. First operand has 264 places, 396 transitions, 6017 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:11:11,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 468 transitions, 8112 flow [2024-06-27 19:11:13,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 468 transitions, 7839 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-27 19:11:13,033 INFO L231 Difference]: Finished difference. Result has 267 places, 402 transitions, 6170 flow [2024-06-27 19:11:13,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5744, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6170, PETRI_PLACES=267, PETRI_TRANSITIONS=402} [2024-06-27 19:11:13,034 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 215 predicate places. [2024-06-27 19:11:13,034 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 402 transitions, 6170 flow [2024-06-27 19:11:13,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:13,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:13,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:13,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:11:13,035 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:13,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash -625719377, now seen corresponding path program 6 times [2024-06-27 19:11:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:13,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335231116] [2024-06-27 19:11:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:15,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:15,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335231116] [2024-06-27 19:11:15,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335231116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:15,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:15,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267863959] [2024-06-27 19:11:15,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:15,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:15,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:15,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:15,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:15,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 402 transitions, 6170 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:15,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:15,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:15,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:19,288 INFO L124 PetriNetUnfolderBase]: 8364/12713 cut-off events. [2024-06-27 19:11:19,288 INFO L125 PetriNetUnfolderBase]: For 614412/614412 co-relation queries the response was YES. [2024-06-27 19:11:19,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86567 conditions, 12713 events. 8364/12713 cut-off events. For 614412/614412 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 79705 event pairs, 1917 based on Foata normal form. 2/12711 useless extension candidates. Maximal degree in co-relation 86438. Up to 11329 conditions per place. [2024-06-27 19:11:19,462 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 390 selfloop transitions, 56 changer transitions 0/453 dead transitions. [2024-06-27 19:11:19,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 453 transitions, 7458 flow [2024-06-27 19:11:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:11:19,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-27 19:11:19,464 INFO L175 Difference]: Start difference. First operand has 267 places, 402 transitions, 6170 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:11:19,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 453 transitions, 7458 flow [2024-06-27 19:11:21,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 453 transitions, 7184 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 19:11:21,571 INFO L231 Difference]: Finished difference. Result has 271 places, 402 transitions, 6014 flow [2024-06-27 19:11:21,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6014, PETRI_PLACES=271, PETRI_TRANSITIONS=402} [2024-06-27 19:11:21,572 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 219 predicate places. [2024-06-27 19:11:21,572 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 402 transitions, 6014 flow [2024-06-27 19:11:21,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:21,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:21,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:21,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:11:21,572 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:21,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -291556859, now seen corresponding path program 8 times [2024-06-27 19:11:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058593181] [2024-06-27 19:11:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:24,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058593181] [2024-06-27 19:11:24,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058593181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:24,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:24,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:24,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080736656] [2024-06-27 19:11:24,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:24,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:24,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:24,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:24,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 402 transitions, 6014 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:24,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:24,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:24,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:28,008 INFO L124 PetriNetUnfolderBase]: 8358/12725 cut-off events. [2024-06-27 19:11:28,008 INFO L125 PetriNetUnfolderBase]: For 612294/612294 co-relation queries the response was YES. [2024-06-27 19:11:28,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85322 conditions, 12725 events. 8358/12725 cut-off events. For 612294/612294 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 79572 event pairs, 1855 based on Foata normal form. 2/12710 useless extension candidates. Maximal degree in co-relation 85192. Up to 10874 conditions per place. [2024-06-27 19:11:28,166 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 327 selfloop transitions, 123 changer transitions 0/457 dead transitions. [2024-06-27 19:11:28,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 457 transitions, 7411 flow [2024-06-27 19:11:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:11:28,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 19:11:28,168 INFO L175 Difference]: Start difference. First operand has 271 places, 402 transitions, 6014 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:11:28,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 457 transitions, 7411 flow [2024-06-27 19:11:30,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 457 transitions, 7220 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 19:11:30,178 INFO L231 Difference]: Finished difference. Result has 272 places, 402 transitions, 6076 flow [2024-06-27 19:11:30,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5823, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6076, PETRI_PLACES=272, PETRI_TRANSITIONS=402} [2024-06-27 19:11:30,179 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 220 predicate places. [2024-06-27 19:11:30,179 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 402 transitions, 6076 flow [2024-06-27 19:11:30,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:30,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:30,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:30,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:11:30,179 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:30,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:30,179 INFO L85 PathProgramCache]: Analyzing trace with hash -420600941, now seen corresponding path program 9 times [2024-06-27 19:11:30,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:30,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446587622] [2024-06-27 19:11:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:30,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:32,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:32,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446587622] [2024-06-27 19:11:32,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446587622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:32,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:32,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:11:32,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96040727] [2024-06-27 19:11:32,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:32,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:11:32,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:32,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:11:32,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:11:32,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:32,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 402 transitions, 6076 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:32,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:32,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:32,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:35,930 INFO L124 PetriNetUnfolderBase]: 8352/12714 cut-off events. [2024-06-27 19:11:35,930 INFO L125 PetriNetUnfolderBase]: For 613950/613950 co-relation queries the response was YES. [2024-06-27 19:11:36,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85641 conditions, 12714 events. 8352/12714 cut-off events. For 613950/613950 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 80065 event pairs, 1943 based on Foata normal form. 2/12706 useless extension candidates. Maximal degree in co-relation 85510. Up to 11513 conditions per place. [2024-06-27 19:11:36,078 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 370 selfloop transitions, 71 changer transitions 0/448 dead transitions. [2024-06-27 19:11:36,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 448 transitions, 7351 flow [2024-06-27 19:11:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:11:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:11:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:11:36,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973958333333333 [2024-06-27 19:11:36,079 INFO L175 Difference]: Start difference. First operand has 272 places, 402 transitions, 6076 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:11:36,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 448 transitions, 7351 flow [2024-06-27 19:11:37,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 448 transitions, 7103 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:11:37,840 INFO L231 Difference]: Finished difference. Result has 273 places, 403 transitions, 6023 flow [2024-06-27 19:11:37,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5830, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6023, PETRI_PLACES=273, PETRI_TRANSITIONS=403} [2024-06-27 19:11:37,841 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 221 predicate places. [2024-06-27 19:11:37,841 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 403 transitions, 6023 flow [2024-06-27 19:11:37,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:37,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:37,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:37,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:11:37,842 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:37,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1973119347, now seen corresponding path program 7 times [2024-06-27 19:11:37,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:37,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701236997] [2024-06-27 19:11:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:37,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:40,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:40,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701236997] [2024-06-27 19:11:40,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701236997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:40,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:40,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:40,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596916184] [2024-06-27 19:11:40,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:40,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:40,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:40,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:40,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 403 transitions, 6023 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:40,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:40,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:40,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:44,626 INFO L124 PetriNetUnfolderBase]: 8662/13204 cut-off events. [2024-06-27 19:11:44,626 INFO L125 PetriNetUnfolderBase]: For 657956/657956 co-relation queries the response was YES. [2024-06-27 19:11:44,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89578 conditions, 13204 events. 8662/13204 cut-off events. For 657956/657956 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 83629 event pairs, 1922 based on Foata normal form. 2/13204 useless extension candidates. Maximal degree in co-relation 89446. Up to 11827 conditions per place. [2024-06-27 19:11:45,082 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 444 selfloop transitions, 48 changer transitions 0/499 dead transitions. [2024-06-27 19:11:45,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 499 transitions, 8146 flow [2024-06-27 19:11:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:11:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:11:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2024-06-27 19:11:45,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-27 19:11:45,084 INFO L175 Difference]: Start difference. First operand has 273 places, 403 transitions, 6023 flow. Second operand 12 states and 279 transitions. [2024-06-27 19:11:45,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 499 transitions, 8146 flow [2024-06-27 19:11:46,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 499 transitions, 7962 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:11:46,697 INFO L231 Difference]: Finished difference. Result has 282 places, 423 transitions, 6503 flow [2024-06-27 19:11:46,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6503, PETRI_PLACES=282, PETRI_TRANSITIONS=423} [2024-06-27 19:11:46,698 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 230 predicate places. [2024-06-27 19:11:46,698 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 423 transitions, 6503 flow [2024-06-27 19:11:46,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:46,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:46,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:46,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:11:46,698 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:46,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash 231203817, now seen corresponding path program 8 times [2024-06-27 19:11:46,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:46,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568900802] [2024-06-27 19:11:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:46,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:49,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:49,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568900802] [2024-06-27 19:11:49,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568900802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:49,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:49,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165148434] [2024-06-27 19:11:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:49,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:49,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:49,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:49,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:49,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:49,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 423 transitions, 6503 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:49,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:49,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:49,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:11:53,201 INFO L124 PetriNetUnfolderBase]: 8656/13196 cut-off events. [2024-06-27 19:11:53,201 INFO L125 PetriNetUnfolderBase]: For 684351/684351 co-relation queries the response was YES. [2024-06-27 19:11:53,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90443 conditions, 13196 events. 8656/13196 cut-off events. For 684351/684351 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 83603 event pairs, 1922 based on Foata normal form. 2/13196 useless extension candidates. Maximal degree in co-relation 90307. Up to 11824 conditions per place. [2024-06-27 19:11:53,406 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 431 selfloop transitions, 46 changer transitions 0/484 dead transitions. [2024-06-27 19:11:53,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 484 transitions, 7930 flow [2024-06-27 19:11:53,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:11:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:11:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-27 19:11:53,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-27 19:11:53,407 INFO L175 Difference]: Start difference. First operand has 282 places, 423 transitions, 6503 flow. Second operand 10 states and 234 transitions. [2024-06-27 19:11:53,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 484 transitions, 7930 flow [2024-06-27 19:11:55,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 484 transitions, 7592 flow, removed 149 selfloop flow, removed 5 redundant places. [2024-06-27 19:11:55,904 INFO L231 Difference]: Finished difference. Result has 287 places, 423 transitions, 6264 flow [2024-06-27 19:11:55,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6264, PETRI_PLACES=287, PETRI_TRANSITIONS=423} [2024-06-27 19:11:55,905 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 235 predicate places. [2024-06-27 19:11:55,905 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 423 transitions, 6264 flow [2024-06-27 19:11:55,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:55,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:11:55,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:11:55,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:11:55,906 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:11:55,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:11:55,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1887085039, now seen corresponding path program 9 times [2024-06-27 19:11:55,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:11:55,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593539435] [2024-06-27 19:11:55,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:11:55,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:11:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:11:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:11:58,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:11:58,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593539435] [2024-06-27 19:11:58,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593539435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:11:58,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:11:58,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:11:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343999891] [2024-06-27 19:11:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:11:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:11:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:11:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:11:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:11:58,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:11:58,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 423 transitions, 6264 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:11:58,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:11:58,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:11:58,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:02,707 INFO L124 PetriNetUnfolderBase]: 9214/13954 cut-off events. [2024-06-27 19:12:02,708 INFO L125 PetriNetUnfolderBase]: For 752518/752518 co-relation queries the response was YES. [2024-06-27 19:12:02,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97231 conditions, 13954 events. 9214/13954 cut-off events. For 752518/752518 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 87342 event pairs, 1835 based on Foata normal form. 4/13948 useless extension candidates. Maximal degree in co-relation 97093. Up to 11058 conditions per place. [2024-06-27 19:12:02,923 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 386 selfloop transitions, 144 changer transitions 0/537 dead transitions. [2024-06-27 19:12:02,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 537 transitions, 9280 flow [2024-06-27 19:12:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:12:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:12:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-27 19:12:02,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5189393939393939 [2024-06-27 19:12:02,924 INFO L175 Difference]: Start difference. First operand has 287 places, 423 transitions, 6264 flow. Second operand 11 states and 274 transitions. [2024-06-27 19:12:02,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 537 transitions, 9280 flow [2024-06-27 19:12:05,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 537 transitions, 9184 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:12:05,935 INFO L231 Difference]: Finished difference. Result has 291 places, 452 transitions, 7319 flow [2024-06-27 19:12:05,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7319, PETRI_PLACES=291, PETRI_TRANSITIONS=452} [2024-06-27 19:12:05,935 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 239 predicate places. [2024-06-27 19:12:05,936 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 452 transitions, 7319 flow [2024-06-27 19:12:05,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:05,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:05,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:05,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:12:05,936 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:05,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:05,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1886847889, now seen corresponding path program 10 times [2024-06-27 19:12:05,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:05,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520410484] [2024-06-27 19:12:05,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:05,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:08,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:08,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:08,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520410484] [2024-06-27 19:12:08,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520410484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:08,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:08,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:08,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979629940] [2024-06-27 19:12:08,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:08,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:08,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:08,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:08,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:08,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 452 transitions, 7319 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:08,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:08,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:08,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:12,512 INFO L124 PetriNetUnfolderBase]: 9202/13940 cut-off events. [2024-06-27 19:12:12,512 INFO L125 PetriNetUnfolderBase]: For 797268/797268 co-relation queries the response was YES. [2024-06-27 19:12:12,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100883 conditions, 13940 events. 9202/13940 cut-off events. For 797268/797268 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 87366 event pairs, 1861 based on Foata normal form. 4/13934 useless extension candidates. Maximal degree in co-relation 100742. Up to 11052 conditions per place. [2024-06-27 19:12:12,720 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 374 selfloop transitions, 151 changer transitions 0/532 dead transitions. [2024-06-27 19:12:12,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 532 transitions, 9678 flow [2024-06-27 19:12:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:12:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:12:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-27 19:12:12,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-27 19:12:12,722 INFO L175 Difference]: Start difference. First operand has 291 places, 452 transitions, 7319 flow. Second operand 10 states and 250 transitions. [2024-06-27 19:12:12,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 532 transitions, 9678 flow [2024-06-27 19:12:15,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 532 transitions, 9049 flow, removed 235 selfloop flow, removed 7 redundant places. [2024-06-27 19:12:15,305 INFO L231 Difference]: Finished difference. Result has 294 places, 462 transitions, 7413 flow [2024-06-27 19:12:15,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6788, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7413, PETRI_PLACES=294, PETRI_TRANSITIONS=462} [2024-06-27 19:12:15,305 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 242 predicate places. [2024-06-27 19:12:15,305 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 462 transitions, 7413 flow [2024-06-27 19:12:15,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:15,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:15,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:15,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:12:15,306 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:15,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash 50178743, now seen corresponding path program 10 times [2024-06-27 19:12:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:15,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042437234] [2024-06-27 19:12:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:15,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:17,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042437234] [2024-06-27 19:12:17,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042437234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:17,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:17,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:12:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477468255] [2024-06-27 19:12:17,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:17,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:12:17,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:12:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:12:17,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:17,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 462 transitions, 7413 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:17,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:17,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:17,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:21,613 INFO L124 PetriNetUnfolderBase]: 9190/13921 cut-off events. [2024-06-27 19:12:21,613 INFO L125 PetriNetUnfolderBase]: For 779986/779986 co-relation queries the response was YES. [2024-06-27 19:12:21,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98486 conditions, 13921 events. 9190/13921 cut-off events. For 779986/779986 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 88108 event pairs, 2120 based on Foata normal form. 4/13915 useless extension candidates. Maximal degree in co-relation 98344. Up to 12651 conditions per place. [2024-06-27 19:12:21,823 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 438 selfloop transitions, 70 changer transitions 0/515 dead transitions. [2024-06-27 19:12:21,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 515 transitions, 8773 flow [2024-06-27 19:12:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:21,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:21,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:12:21,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-27 19:12:21,824 INFO L175 Difference]: Start difference. First operand has 294 places, 462 transitions, 7413 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:12:21,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 515 transitions, 8773 flow [2024-06-27 19:12:24,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 515 transitions, 8482 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-27 19:12:24,782 INFO L231 Difference]: Finished difference. Result has 298 places, 462 transitions, 7274 flow [2024-06-27 19:12:24,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7122, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7274, PETRI_PLACES=298, PETRI_TRANSITIONS=462} [2024-06-27 19:12:24,782 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 246 predicate places. [2024-06-27 19:12:24,782 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 462 transitions, 7274 flow [2024-06-27 19:12:24,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:24,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:24,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:24,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:12:24,783 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:24,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash 50178929, now seen corresponding path program 11 times [2024-06-27 19:12:24,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:24,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862074358] [2024-06-27 19:12:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:24,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:27,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:27,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862074358] [2024-06-27 19:12:27,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862074358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:27,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:27,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:27,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914017111] [2024-06-27 19:12:27,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:27,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:27,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:27,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:27,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 462 transitions, 7274 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:27,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:27,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:27,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:31,195 INFO L124 PetriNetUnfolderBase]: 9184/13902 cut-off events. [2024-06-27 19:12:31,196 INFO L125 PetriNetUnfolderBase]: For 768803/768803 co-relation queries the response was YES. [2024-06-27 19:12:31,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98010 conditions, 13902 events. 9184/13902 cut-off events. For 768803/768803 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 87146 event pairs, 1860 based on Foata normal form. 2/13894 useless extension candidates. Maximal degree in co-relation 97866. Up to 11043 conditions per place. [2024-06-27 19:12:31,367 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 356 selfloop transitions, 161 changer transitions 0/524 dead transitions. [2024-06-27 19:12:31,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 524 transitions, 9227 flow [2024-06-27 19:12:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:12:31,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-27 19:12:31,368 INFO L175 Difference]: Start difference. First operand has 298 places, 462 transitions, 7274 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:12:31,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 524 transitions, 9227 flow [2024-06-27 19:12:33,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 524 transitions, 8989 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 19:12:33,913 INFO L231 Difference]: Finished difference. Result has 300 places, 466 transitions, 7564 flow [2024-06-27 19:12:33,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7036, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7564, PETRI_PLACES=300, PETRI_TRANSITIONS=466} [2024-06-27 19:12:33,913 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 248 predicate places. [2024-06-27 19:12:33,914 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 466 transitions, 7564 flow [2024-06-27 19:12:33,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:33,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:33,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:33,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:12:33,914 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:33,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1591345971, now seen corresponding path program 12 times [2024-06-27 19:12:33,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:33,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971918304] [2024-06-27 19:12:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:33,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:36,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:36,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971918304] [2024-06-27 19:12:36,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971918304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:36,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:36,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:12:36,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176668941] [2024-06-27 19:12:36,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:36,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:12:36,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:12:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:12:36,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:36,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 466 transitions, 7564 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:36,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:36,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:36,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:40,569 INFO L124 PetriNetUnfolderBase]: 9178/13933 cut-off events. [2024-06-27 19:12:40,570 INFO L125 PetriNetUnfolderBase]: For 783559/783559 co-relation queries the response was YES. [2024-06-27 19:12:40,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98987 conditions, 13933 events. 9178/13933 cut-off events. For 783559/783559 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 88383 event pairs, 2041 based on Foata normal form. 2/13933 useless extension candidates. Maximal degree in co-relation 98842. Up to 12787 conditions per place. [2024-06-27 19:12:40,749 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 474 selfloop transitions, 36 changer transitions 0/517 dead transitions. [2024-06-27 19:12:40,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 517 transitions, 8786 flow [2024-06-27 19:12:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:12:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:12:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 19:12:40,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-27 19:12:40,750 INFO L175 Difference]: Start difference. First operand has 300 places, 466 transitions, 7564 flow. Second operand 9 states and 210 transitions. [2024-06-27 19:12:40,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 517 transitions, 8786 flow [2024-06-27 19:12:43,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 517 transitions, 8460 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-27 19:12:43,296 INFO L231 Difference]: Finished difference. Result has 305 places, 466 transitions, 7317 flow [2024-06-27 19:12:43,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7238, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7317, PETRI_PLACES=305, PETRI_TRANSITIONS=466} [2024-06-27 19:12:43,296 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 253 predicate places. [2024-06-27 19:12:43,296 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 466 transitions, 7317 flow [2024-06-27 19:12:43,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:43,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:43,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:43,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:12:43,297 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:43,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:43,297 INFO L85 PathProgramCache]: Analyzing trace with hash -571972949, now seen corresponding path program 2 times [2024-06-27 19:12:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100555023] [2024-06-27 19:12:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:47,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:47,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100555023] [2024-06-27 19:12:47,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100555023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:47,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:47,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:12:47,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247080438] [2024-06-27 19:12:47,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:47,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:12:47,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:12:47,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:12:47,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:47,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 466 transitions, 7317 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:47,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:47,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:47,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:12:51,286 INFO L124 PetriNetUnfolderBase]: 9390/14367 cut-off events. [2024-06-27 19:12:51,287 INFO L125 PetriNetUnfolderBase]: For 822856/822856 co-relation queries the response was YES. [2024-06-27 19:12:51,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100811 conditions, 14367 events. 9390/14367 cut-off events. For 822856/822856 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 92223 event pairs, 1975 based on Foata normal form. 12/14369 useless extension candidates. Maximal degree in co-relation 100664. Up to 12701 conditions per place. [2024-06-27 19:12:51,826 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 471 selfloop transitions, 47 changer transitions 0/525 dead transitions. [2024-06-27 19:12:51,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 525 transitions, 8986 flow [2024-06-27 19:12:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:12:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:12:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:12:51,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-27 19:12:51,828 INFO L175 Difference]: Start difference. First operand has 305 places, 466 transitions, 7317 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:12:51,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 525 transitions, 8986 flow [2024-06-27 19:12:54,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 525 transitions, 8893 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:12:54,556 INFO L231 Difference]: Finished difference. Result has 306 places, 467 transitions, 7344 flow [2024-06-27 19:12:54,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7224, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7344, PETRI_PLACES=306, PETRI_TRANSITIONS=467} [2024-06-27 19:12:54,557 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 254 predicate places. [2024-06-27 19:12:54,557 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 467 transitions, 7344 flow [2024-06-27 19:12:54,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:54,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:12:54,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:12:54,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:12:54,558 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:12:54,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:12:54,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1900038637, now seen corresponding path program 3 times [2024-06-27 19:12:54,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:12:54,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970019451] [2024-06-27 19:12:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:12:54,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:12:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:12:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:12:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:12:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970019451] [2024-06-27 19:12:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970019451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:12:58,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:12:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:12:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673540189] [2024-06-27 19:12:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:12:58,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:12:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:12:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:12:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:12:58,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:12:58,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 467 transitions, 7344 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:12:58,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:12:58,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:12:58,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:02,278 INFO L124 PetriNetUnfolderBase]: 9602/14599 cut-off events. [2024-06-27 19:13:02,278 INFO L125 PetriNetUnfolderBase]: For 854613/854613 co-relation queries the response was YES. [2024-06-27 19:13:02,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103423 conditions, 14599 events. 9602/14599 cut-off events. For 854613/854613 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 93675 event pairs, 2148 based on Foata normal form. 12/14609 useless extension candidates. Maximal degree in co-relation 103276. Up to 13319 conditions per place. [2024-06-27 19:13:02,769 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 490 selfloop transitions, 22 changer transitions 0/519 dead transitions. [2024-06-27 19:13:02,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 519 transitions, 8885 flow [2024-06-27 19:13:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:13:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:13:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 19:13:02,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869791666666667 [2024-06-27 19:13:02,781 INFO L175 Difference]: Start difference. First operand has 306 places, 467 transitions, 7344 flow. Second operand 8 states and 187 transitions. [2024-06-27 19:13:02,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 519 transitions, 8885 flow [2024-06-27 19:13:04,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 519 transitions, 8789 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:13:04,982 INFO L231 Difference]: Finished difference. Result has 308 places, 468 transitions, 7321 flow [2024-06-27 19:13:04,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7248, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7321, PETRI_PLACES=308, PETRI_TRANSITIONS=468} [2024-06-27 19:13:04,982 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 256 predicate places. [2024-06-27 19:13:04,983 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 468 transitions, 7321 flow [2024-06-27 19:13:04,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:04,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:04,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:04,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:13:04,983 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:04,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash -559013399, now seen corresponding path program 4 times [2024-06-27 19:13:04,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:04,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570030381] [2024-06-27 19:13:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:04,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:08,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570030381] [2024-06-27 19:13:08,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570030381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:08,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:08,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:13:08,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653665687] [2024-06-27 19:13:08,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:08,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:13:08,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:08,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:13:08,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:13:08,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-27 19:13:08,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 468 transitions, 7321 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:08,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:08,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-27 19:13:08,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:13,156 INFO L124 PetriNetUnfolderBase]: 9652/14683 cut-off events. [2024-06-27 19:13:13,156 INFO L125 PetriNetUnfolderBase]: For 844007/844007 co-relation queries the response was YES. [2024-06-27 19:13:13,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103571 conditions, 14683 events. 9652/14683 cut-off events. For 844007/844007 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 94174 event pairs, 2085 based on Foata normal form. 8/14689 useless extension candidates. Maximal degree in co-relation 103423. Up to 13215 conditions per place. [2024-06-27 19:13:13,346 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 499 selfloop transitions, 25 changer transitions 0/531 dead transitions. [2024-06-27 19:13:13,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 531 transitions, 9016 flow [2024-06-27 19:13:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:13:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:13:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-27 19:13:13,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-27 19:13:13,347 INFO L175 Difference]: Start difference. First operand has 308 places, 468 transitions, 7321 flow. Second operand 9 states and 211 transitions. [2024-06-27 19:13:13,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 531 transitions, 9016 flow [2024-06-27 19:13:15,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 531 transitions, 8969 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:13:15,962 INFO L231 Difference]: Finished difference. Result has 311 places, 469 transitions, 7352 flow [2024-06-27 19:13:15,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7274, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7352, PETRI_PLACES=311, PETRI_TRANSITIONS=469} [2024-06-27 19:13:15,962 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 259 predicate places. [2024-06-27 19:13:15,962 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 469 transitions, 7352 flow [2024-06-27 19:13:15,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:15,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:15,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:15,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:13:15,963 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:15,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash -744036333, now seen corresponding path program 1 times [2024-06-27 19:13:15,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:15,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610655561] [2024-06-27 19:13:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:18,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:18,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610655561] [2024-06-27 19:13:18,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610655561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:18,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:18,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:13:18,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34413610] [2024-06-27 19:13:18,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:18,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:13:18,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:18,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:13:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:13:18,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:13:18,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 469 transitions, 7352 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:18,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:18,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:13:18,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:22,866 INFO L124 PetriNetUnfolderBase]: 9484/14510 cut-off events. [2024-06-27 19:13:22,866 INFO L125 PetriNetUnfolderBase]: For 809750/809798 co-relation queries the response was YES. [2024-06-27 19:13:22,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101566 conditions, 14510 events. 9484/14510 cut-off events. For 809750/809798 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 94697 event pairs, 1726 based on Foata normal form. 15/14468 useless extension candidates. Maximal degree in co-relation 101417. Up to 12205 conditions per place. [2024-06-27 19:13:23,054 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 432 selfloop transitions, 54 changer transitions 0/530 dead transitions. [2024-06-27 19:13:23,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 530 transitions, 9068 flow [2024-06-27 19:13:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:13:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:13:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 19:13:23,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-27 19:13:23,055 INFO L175 Difference]: Start difference. First operand has 311 places, 469 transitions, 7352 flow. Second operand 7 states and 187 transitions. [2024-06-27 19:13:23,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 530 transitions, 9068 flow [2024-06-27 19:13:25,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 530 transitions, 9018 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:13:25,803 INFO L231 Difference]: Finished difference. Result has 313 places, 472 transitions, 7524 flow [2024-06-27 19:13:25,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7302, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7524, PETRI_PLACES=313, PETRI_TRANSITIONS=472} [2024-06-27 19:13:25,804 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 261 predicate places. [2024-06-27 19:13:25,804 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 472 transitions, 7524 flow [2024-06-27 19:13:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:25,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:25,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:25,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:13:25,804 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:25,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1936957305, now seen corresponding path program 2 times [2024-06-27 19:13:25,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:25,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531293547] [2024-06-27 19:13:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:25,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:28,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531293547] [2024-06-27 19:13:28,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531293547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:28,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:28,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:13:28,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965485916] [2024-06-27 19:13:28,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:28,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:13:28,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:28,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:13:28,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:13:28,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:13:28,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 472 transitions, 7524 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:28,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:28,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:13:28,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:33,058 INFO L124 PetriNetUnfolderBase]: 9714/14862 cut-off events. [2024-06-27 19:13:33,058 INFO L125 PetriNetUnfolderBase]: For 860363/860419 co-relation queries the response was YES. [2024-06-27 19:13:33,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104588 conditions, 14862 events. 9714/14862 cut-off events. For 860363/860419 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 97453 event pairs, 1798 based on Foata normal form. 21/14809 useless extension candidates. Maximal degree in co-relation 104437. Up to 12870 conditions per place. [2024-06-27 19:13:33,232 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 427 selfloop transitions, 52 changer transitions 0/523 dead transitions. [2024-06-27 19:13:33,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 523 transitions, 8885 flow [2024-06-27 19:13:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:13:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:13:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:13:33,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-27 19:13:33,233 INFO L175 Difference]: Start difference. First operand has 313 places, 472 transitions, 7524 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:13:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 523 transitions, 8885 flow [2024-06-27 19:13:35,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 523 transitions, 8803 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:13:35,278 INFO L231 Difference]: Finished difference. Result has 317 places, 473 transitions, 7571 flow [2024-06-27 19:13:35,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7444, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7571, PETRI_PLACES=317, PETRI_TRANSITIONS=473} [2024-06-27 19:13:35,279 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 265 predicate places. [2024-06-27 19:13:35,279 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 473 transitions, 7571 flow [2024-06-27 19:13:35,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:35,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:13:35,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:13:35,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:13:35,279 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:13:35,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:13:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1607289777, now seen corresponding path program 3 times [2024-06-27 19:13:35,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:13:35,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8764104] [2024-06-27 19:13:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:13:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:13:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:13:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:13:38,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:13:38,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8764104] [2024-06-27 19:13:38,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8764104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:13:38,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:13:38,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:13:38,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948805716] [2024-06-27 19:13:38,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:13:38,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:13:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:13:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:13:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:13:38,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-27 19:13:38,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 473 transitions, 7571 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:13:38,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:13:38,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-27 19:13:38,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:13:43,371 INFO L124 PetriNetUnfolderBase]: 9919/15181 cut-off events. [2024-06-27 19:13:43,371 INFO L125 PetriNetUnfolderBase]: For 881585/881632 co-relation queries the response was YES. [2024-06-27 19:13:43,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107216 conditions, 15181 events. 9919/15181 cut-off events. For 881585/881632 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 99702 event pairs, 1897 based on Foata normal form. 19/15145 useless extension candidates. Maximal degree in co-relation 107063. Up to 13205 conditions per place. [2024-06-27 19:13:43,555 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 428 selfloop transitions, 59 changer transitions 0/531 dead transitions. [2024-06-27 19:13:43,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 531 transitions, 8964 flow [2024-06-27 19:13:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:13:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:13:43,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:13:43,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-27 19:13:43,557 INFO L175 Difference]: Start difference. First operand has 317 places, 473 transitions, 7571 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:13:43,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 531 transitions, 8964 flow