./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe009_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:25:43,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:25:43,964 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:25:43,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:25:43,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:25:43,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:25:43,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:25:43,980 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:25:43,981 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:25:43,981 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:25:43,981 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:25:43,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:25:43,982 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:25:43,982 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:25:43,983 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:25:43,983 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:25:43,983 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:25:43,983 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:25:43,984 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:25:43,984 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:25:43,984 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:25:43,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:25:43,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:25:43,987 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:25:43,987 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:25:43,987 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:25:43,988 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:25:43,988 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:25:43,988 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:25:43,988 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:25:43,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:25:43,989 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:25:43,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:25:43,990 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:25:43,990 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:25:43,990 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:25:43,990 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:25:43,991 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:25:43,991 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:25:43,991 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:25:43,991 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:25:43,991 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:25:43,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:25:43,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:25:44,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:25:44,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:25:44,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:25:44,209 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:25:44,209 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:25:44,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_rmo.oepc.i [2024-06-21 17:25:45,174 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:25:45,382 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:25:45,383 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_rmo.oepc.i [2024-06-21 17:25:45,395 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4ca0b4b/9cf830fb89754ecaa8a362647c459970/FLAG417f50a2a [2024-06-21 17:25:45,405 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4ca0b4b/9cf830fb89754ecaa8a362647c459970 [2024-06-21 17:25:45,407 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:25:45,408 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:25:45,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe009_rmo.oepc.yml/witness.yml [2024-06-21 17:25:45,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:25:45,607 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:25:45,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:25:45,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:25:45,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:25:45,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:25:45" (1/2) ... [2024-06-21 17:25:45,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57eb7a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:25:45, skipping insertion in model container [2024-06-21 17:25:45,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:25:45" (1/2) ... [2024-06-21 17:25:45,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74abd42c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:25:45, skipping insertion in model container [2024-06-21 17:25:45,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:25:45" (2/2) ... [2024-06-21 17:25:45,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57eb7a83 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:45, skipping insertion in model container [2024-06-21 17:25:45,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:25:45" (2/2) ... [2024-06-21 17:25:45,618 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:25:45,729 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:25:45,731 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:25:45,731 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:25:45,731 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-21 17:25:45,734 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:25:45,734 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-21 17:25:45,779 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:25:46,057 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:25:46,075 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:25:46,209 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:25:46,236 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:25:46,237 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46 WrapperNode [2024-06-21 17:25:46,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:25:46,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:25:46,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:25:46,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:25:46,244 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,268 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,298 INFO L138 Inliner]: procedures = 175, calls = 81, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 224 [2024-06-21 17:25:46,298 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:25:46,299 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:25:46,299 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:25:46,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:25:46,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,313 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,346 INFO L175 MemorySlicer]: Split 42 memory accesses to 2 slices as follows [2, 40]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-21 17:25:46,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:25:46,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:25:46,405 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:25:46,405 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:25:46,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (1/1) ... [2024-06-21 17:25:46,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:25:46,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:25:46,433 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) [2024-06-21 17:25:46,436 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 [2024-06-21 17:25:46,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:25:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:25:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:25:46,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:25:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:25:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:25:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:25:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:25:46,474 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:25:46,474 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:25:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:25:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:25:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:25:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:25:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:25:46,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:25:46,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:25:46,480 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:25:46,585 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:25:46,587 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:25:47,031 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:25:47,031 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:25:47,373 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:25:47,373 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:25:47,374 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:25:47 BoogieIcfgContainer [2024-06-21 17:25:47,374 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:25:47,376 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:25:47,376 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:25:47,379 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:25:47,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:25:45" (1/4) ... [2024-06-21 17:25:47,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374c181a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:25:47, skipping insertion in model container [2024-06-21 17:25:47,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:25:45" (2/4) ... [2024-06-21 17:25:47,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374c181a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:25:47, skipping insertion in model container [2024-06-21 17:25:47,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:25:46" (3/4) ... [2024-06-21 17:25:47,380 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374c181a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:25:47, skipping insertion in model container [2024-06-21 17:25:47,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:25:47" (4/4) ... [2024-06-21 17:25:47,381 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_rmo.oepc.i [2024-06-21 17:25:47,396 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:25:47,396 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:25:47,396 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:25:47,443 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:25:47,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:25:47,504 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 17:25:47,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:25:47,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:25:47,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:25:47,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 17:25:47,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:25:47,527 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;@735d97e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:25:47,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:25:47,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:25:47,531 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:25:47,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:25:47,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:47,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:25:47,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:47,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash 723089069, now seen corresponding path program 1 times [2024-06-21 17:25:47,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:47,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488309321] [2024-06-21 17:25:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:49,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:49,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488309321] [2024-06-21 17:25:49,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488309321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:49,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:49,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:25:49,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087646439] [2024-06-21 17:25:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:49,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:25:49,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:49,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:25:49,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:25:49,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:25:49,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:49,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:49,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:25:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:49,726 INFO L124 PetriNetUnfolderBase]: 990/1529 cut-off events. [2024-06-21 17:25:49,726 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 17:25:49,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3109 conditions, 1529 events. 990/1529 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7037 event pairs, 650 based on Foata normal form. 1/1498 useless extension candidates. Maximal degree in co-relation 3097. Up to 1503 conditions per place. [2024-06-21 17:25:49,743 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 17:25:49,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 179 flow [2024-06-21 17:25:49,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:25:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:25:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-21 17:25:49,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-21 17:25:49,755 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 68 transitions. [2024-06-21 17:25:49,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 179 flow [2024-06-21 17:25:49,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:25:49,759 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 17:25:49,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 17:25:49,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 17:25:49,764 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 17:25:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:49,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:49,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:49,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:25:49,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:49,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash -896057172, now seen corresponding path program 1 times [2024-06-21 17:25:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:49,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914722502] [2024-06-21 17:25:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:49,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:51,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:51,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914722502] [2024-06-21 17:25:51,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914722502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:51,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:51,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:25:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296714029] [2024-06-21 17:25:51,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:51,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:25:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:25:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:25:51,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:25:51,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:51,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:51,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:25:51,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:52,212 INFO L124 PetriNetUnfolderBase]: 984/1519 cut-off events. [2024-06-21 17:25:52,213 INFO L125 PetriNetUnfolderBase]: For 287/291 co-relation queries the response was YES. [2024-06-21 17:25:52,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3528 conditions, 1519 events. 984/1519 cut-off events. For 287/291 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6953 event pairs, 540 based on Foata normal form. 5/1521 useless extension candidates. Maximal degree in co-relation 3516. Up to 1475 conditions per place. [2024-06-21 17:25:52,219 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-21 17:25:52,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 254 flow [2024-06-21 17:25:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:25:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:25:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-21 17:25:52,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-21 17:25:52,221 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 89 transitions. [2024-06-21 17:25:52,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 254 flow [2024-06-21 17:25:52,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:25:52,223 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 17:25:52,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 17:25:52,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 17:25:52,224 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 17:25:52,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:52,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:52,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:25:52,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:52,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2007966949, now seen corresponding path program 1 times [2024-06-21 17:25:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:52,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168301199] [2024-06-21 17:25:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:54,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:54,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168301199] [2024-06-21 17:25:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168301199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:54,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:54,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:25:54,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260912209] [2024-06-21 17:25:54,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:54,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:25:54,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:25:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:25:54,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:25:54,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:54,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:54,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:25:54,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:54,940 INFO L124 PetriNetUnfolderBase]: 1183/1810 cut-off events. [2024-06-21 17:25:54,941 INFO L125 PetriNetUnfolderBase]: For 937/937 co-relation queries the response was YES. [2024-06-21 17:25:54,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4673 conditions, 1810 events. 1183/1810 cut-off events. For 937/937 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8211 event pairs, 510 based on Foata normal form. 3/1811 useless extension candidates. Maximal degree in co-relation 4659. Up to 1748 conditions per place. [2024-06-21 17:25:54,952 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-21 17:25:54,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 379 flow [2024-06-21 17:25:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:25:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:25:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-21 17:25:54,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-21 17:25:54,957 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 106 transitions. [2024-06-21 17:25:54,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 379 flow [2024-06-21 17:25:54,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 358 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:25:54,961 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 206 flow [2024-06-21 17:25:54,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-06-21 17:25:54,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 17:25:54,963 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 206 flow [2024-06-21 17:25:54,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:54,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:54,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:54,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:25:54,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:54,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2076528106, now seen corresponding path program 1 times [2024-06-21 17:25:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677664074] [2024-06-21 17:25:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:54,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:57,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:57,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677664074] [2024-06-21 17:25:57,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677664074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:57,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:57,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:25:57,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660142009] [2024-06-21 17:25:57,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:57,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:25:57,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:57,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:25:57,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:25:57,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:25:57,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:57,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:57,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:25:57,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:25:57,965 INFO L124 PetriNetUnfolderBase]: 1174/1795 cut-off events. [2024-06-21 17:25:57,966 INFO L125 PetriNetUnfolderBase]: For 1619/1619 co-relation queries the response was YES. [2024-06-21 17:25:57,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5131 conditions, 1795 events. 1174/1795 cut-off events. For 1619/1619 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8119 event pairs, 365 based on Foata normal form. 6/1799 useless extension candidates. Maximal degree in co-relation 5114. Up to 1695 conditions per place. [2024-06-21 17:25:57,974 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 64 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-21 17:25:57,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 442 flow [2024-06-21 17:25:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:25:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:25:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-21 17:25:57,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.491869918699187 [2024-06-21 17:25:57,978 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 206 flow. Second operand 6 states and 121 transitions. [2024-06-21 17:25:57,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 442 flow [2024-06-21 17:25:57,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 438 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 17:25:57,984 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 241 flow [2024-06-21 17:25:57,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-06-21 17:25:57,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-21 17:25:57,986 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 241 flow [2024-06-21 17:25:57,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:57,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:25:57,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:25:57,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:25:57,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:25:57,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:25:57,987 INFO L85 PathProgramCache]: Analyzing trace with hash 516907577, now seen corresponding path program 1 times [2024-06-21 17:25:57,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:25:57,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427822001] [2024-06-21 17:25:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:25:57,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:25:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:25:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:25:59,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:25:59,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427822001] [2024-06-21 17:25:59,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427822001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:25:59,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:25:59,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:25:59,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639249790] [2024-06-21 17:25:59,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:25:59,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:25:59,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:25:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:25:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:25:59,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:25:59,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 241 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:25:59,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:25:59,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:25:59,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:00,431 INFO L124 PetriNetUnfolderBase]: 1192/1822 cut-off events. [2024-06-21 17:26:00,431 INFO L125 PetriNetUnfolderBase]: For 2570/2572 co-relation queries the response was YES. [2024-06-21 17:26:00,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 1822 events. 1192/1822 cut-off events. For 2570/2572 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8311 event pairs, 452 based on Foata normal form. 10/1830 useless extension candidates. Maximal degree in co-relation 5528. Up to 1694 conditions per place. [2024-06-21 17:26:00,465 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2024-06-21 17:26:00,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 475 flow [2024-06-21 17:26:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:26:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:26:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 17:26:00,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-21 17:26:00,470 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 241 flow. Second operand 5 states and 93 transitions. [2024-06-21 17:26:00,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 475 flow [2024-06-21 17:26:00,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 446 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:00,476 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 299 flow [2024-06-21 17:26:00,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-21 17:26:00,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-21 17:26:00,477 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 299 flow [2024-06-21 17:26:00,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:00,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:00,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:00,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:26:00,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:00,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash -979506050, now seen corresponding path program 1 times [2024-06-21 17:26:00,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:00,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134087107] [2024-06-21 17:26:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:00,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:02,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:02,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134087107] [2024-06-21 17:26:02,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134087107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:02,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:02,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:26:02,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945145085] [2024-06-21 17:26:02,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:02,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:26:02,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:02,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:26:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:26:02,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:02,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 299 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:02,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:02,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:02,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:03,795 INFO L124 PetriNetUnfolderBase]: 1205/1847 cut-off events. [2024-06-21 17:26:03,796 INFO L125 PetriNetUnfolderBase]: For 3808/3812 co-relation queries the response was YES. [2024-06-21 17:26:03,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6311 conditions, 1847 events. 1205/1847 cut-off events. For 3808/3812 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8438 event pairs, 455 based on Foata normal form. 6/1851 useless extension candidates. Maximal degree in co-relation 6287. Up to 1726 conditions per place. [2024-06-21 17:26:03,804 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-21 17:26:03,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 633 flow [2024-06-21 17:26:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:26:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:26:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 17:26:03,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-21 17:26:03,806 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 299 flow. Second operand 7 states and 127 transitions. [2024-06-21 17:26:03,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 633 flow [2024-06-21 17:26:03,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 621 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 17:26:03,810 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 391 flow [2024-06-21 17:26:03,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 17:26:03,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-21 17:26:03,812 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 391 flow [2024-06-21 17:26:03,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:03,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:03,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:03,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:26:03,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:03,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:03,813 INFO L85 PathProgramCache]: Analyzing trace with hash -979385894, now seen corresponding path program 1 times [2024-06-21 17:26:03,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:03,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809437352] [2024-06-21 17:26:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:03,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:06,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:06,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809437352] [2024-06-21 17:26:06,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809437352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:06,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:06,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:26:06,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381005403] [2024-06-21 17:26:06,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:06,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:26:06,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:06,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:26:06,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:26:06,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:06,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:06,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:06,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:06,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:07,334 INFO L124 PetriNetUnfolderBase]: 1420/2150 cut-off events. [2024-06-21 17:26:07,334 INFO L125 PetriNetUnfolderBase]: For 5955/5959 co-relation queries the response was YES. [2024-06-21 17:26:07,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7808 conditions, 2150 events. 1420/2150 cut-off events. For 5955/5959 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9885 event pairs, 466 based on Foata normal form. 12/2160 useless extension candidates. Maximal degree in co-relation 7781. Up to 1906 conditions per place. [2024-06-21 17:26:07,347 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 90 selfloop transitions, 28 changer transitions 0/122 dead transitions. [2024-06-21 17:26:07,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 122 transitions, 875 flow [2024-06-21 17:26:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:26:07,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 17:26:07,349 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 391 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:26:07,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 122 transitions, 875 flow [2024-06-21 17:26:07,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 122 transitions, 837 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:26:07,355 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 533 flow [2024-06-21 17:26:07,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=533, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-21 17:26:07,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-21 17:26:07,355 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 533 flow [2024-06-21 17:26:07,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:07,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:07,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:07,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:26:07,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:07,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:07,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1645365344, now seen corresponding path program 2 times [2024-06-21 17:26:07,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:07,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019521402] [2024-06-21 17:26:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:07,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:10,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:10,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019521402] [2024-06-21 17:26:10,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019521402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:10,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:10,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:26:10,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732131853] [2024-06-21 17:26:10,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:26:10,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:26:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:26:10,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:10,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:10,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:10,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:10,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:11,667 INFO L124 PetriNetUnfolderBase]: 1461/2220 cut-off events. [2024-06-21 17:26:11,668 INFO L125 PetriNetUnfolderBase]: For 8601/8628 co-relation queries the response was YES. [2024-06-21 17:26:11,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9089 conditions, 2220 events. 1461/2220 cut-off events. For 8601/8628 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10271 event pairs, 490 based on Foata normal form. 19/2236 useless extension candidates. Maximal degree in co-relation 9058. Up to 2099 conditions per place. [2024-06-21 17:26:11,687 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 84 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-21 17:26:11,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 927 flow [2024-06-21 17:26:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:26:11,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 17:26:11,690 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 533 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:26:11,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 927 flow [2024-06-21 17:26:11,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 861 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 17:26:11,700 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 673 flow [2024-06-21 17:26:11,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=673, PETRI_PLACES=79, PETRI_TRANSITIONS=89} [2024-06-21 17:26:11,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-21 17:26:11,703 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 673 flow [2024-06-21 17:26:11,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:11,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:11,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:26:11,704 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:11,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 950575708, now seen corresponding path program 3 times [2024-06-21 17:26:11,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:11,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420560925] [2024-06-21 17:26:11,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:13,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:13,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420560925] [2024-06-21 17:26:13,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420560925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:13,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:13,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:26:13,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601848014] [2024-06-21 17:26:13,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:13,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:26:13,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:26:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:26:13,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:13,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:13,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:13,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:13,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:15,253 INFO L124 PetriNetUnfolderBase]: 1857/2812 cut-off events. [2024-06-21 17:26:15,254 INFO L125 PetriNetUnfolderBase]: For 11516/11520 co-relation queries the response was YES. [2024-06-21 17:26:15,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11735 conditions, 2812 events. 1857/2812 cut-off events. For 11516/11520 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13472 event pairs, 514 based on Foata normal form. 22/2832 useless extension candidates. Maximal degree in co-relation 11699. Up to 2161 conditions per place. [2024-06-21 17:26:15,272 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 122 selfloop transitions, 68 changer transitions 0/194 dead transitions. [2024-06-21 17:26:15,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 194 transitions, 1660 flow [2024-06-21 17:26:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:26:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:26:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-21 17:26:15,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501108647450111 [2024-06-21 17:26:15,274 INFO L175 Difference]: Start difference. First operand has 79 places, 89 transitions, 673 flow. Second operand 11 states and 203 transitions. [2024-06-21 17:26:15,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 194 transitions, 1660 flow [2024-06-21 17:26:15,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 194 transitions, 1575 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 17:26:15,291 INFO L231 Difference]: Finished difference. Result has 92 places, 125 transitions, 1103 flow [2024-06-21 17:26:15,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1103, PETRI_PLACES=92, PETRI_TRANSITIONS=125} [2024-06-21 17:26:15,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-21 17:26:15,292 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 125 transitions, 1103 flow [2024-06-21 17:26:15,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:15,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:15,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:15,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:26:15,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:15,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash -612926984, now seen corresponding path program 2 times [2024-06-21 17:26:15,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:15,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457764587] [2024-06-21 17:26:15,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:15,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457764587] [2024-06-21 17:26:17,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457764587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:17,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:17,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:26:17,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649680508] [2024-06-21 17:26:17,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:17,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:26:17,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:26:17,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:26:17,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:17,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 125 transitions, 1103 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:17,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:17,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:17,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:18,327 INFO L124 PetriNetUnfolderBase]: 1897/2856 cut-off events. [2024-06-21 17:26:18,327 INFO L125 PetriNetUnfolderBase]: For 16487/16493 co-relation queries the response was YES. [2024-06-21 17:26:18,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13524 conditions, 2856 events. 1897/2856 cut-off events. For 16487/16493 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13615 event pairs, 477 based on Foata normal form. 20/2874 useless extension candidates. Maximal degree in co-relation 13481. Up to 2317 conditions per place. [2024-06-21 17:26:18,346 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 67 changer transitions 0/160 dead transitions. [2024-06-21 17:26:18,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 160 transitions, 1591 flow [2024-06-21 17:26:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:26:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:26:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:26:18,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 17:26:18,376 INFO L175 Difference]: Start difference. First operand has 92 places, 125 transitions, 1103 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:26:18,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 160 transitions, 1591 flow [2024-06-21 17:26:18,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 160 transitions, 1514 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:18,402 INFO L231 Difference]: Finished difference. Result has 96 places, 133 transitions, 1301 flow [2024-06-21 17:26:18,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1301, PETRI_PLACES=96, PETRI_TRANSITIONS=133} [2024-06-21 17:26:18,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 17:26:18,404 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 133 transitions, 1301 flow [2024-06-21 17:26:18,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:18,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:18,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:18,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:26:18,404 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:18,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:18,405 INFO L85 PathProgramCache]: Analyzing trace with hash -612927170, now seen corresponding path program 4 times [2024-06-21 17:26:18,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:18,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569015103] [2024-06-21 17:26:18,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:18,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:20,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:20,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569015103] [2024-06-21 17:26:20,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569015103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:20,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:20,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:26:20,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206926364] [2024-06-21 17:26:20,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:20,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:26:20,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:26:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:26:20,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:20,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 133 transitions, 1301 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:20,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:20,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:20,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:21,866 INFO L124 PetriNetUnfolderBase]: 1892/2857 cut-off events. [2024-06-21 17:26:21,866 INFO L125 PetriNetUnfolderBase]: For 19625/19631 co-relation queries the response was YES. [2024-06-21 17:26:21,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14272 conditions, 2857 events. 1892/2857 cut-off events. For 19625/19631 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13677 event pairs, 547 based on Foata normal form. 8/2863 useless extension candidates. Maximal degree in co-relation 14227. Up to 2628 conditions per place. [2024-06-21 17:26:21,886 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 110 selfloop transitions, 44 changer transitions 0/158 dead transitions. [2024-06-21 17:26:21,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 158 transitions, 1685 flow [2024-06-21 17:26:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:26:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:26:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:26:21,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 17:26:21,888 INFO L175 Difference]: Start difference. First operand has 96 places, 133 transitions, 1301 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:26:21,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 158 transitions, 1685 flow [2024-06-21 17:26:21,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 158 transitions, 1564 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:21,913 INFO L231 Difference]: Finished difference. Result has 98 places, 133 transitions, 1293 flow [2024-06-21 17:26:21,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1293, PETRI_PLACES=98, PETRI_TRANSITIONS=133} [2024-06-21 17:26:21,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 17:26:21,914 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 133 transitions, 1293 flow [2024-06-21 17:26:21,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:21,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:21,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:21,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:26:21,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:21,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash -612689834, now seen corresponding path program 3 times [2024-06-21 17:26:21,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:21,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909151294] [2024-06-21 17:26:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:23,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:23,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909151294] [2024-06-21 17:26:23,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909151294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:23,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:23,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:26:23,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804691741] [2024-06-21 17:26:23,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:23,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:26:23,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:26:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:26:23,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:23,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 133 transitions, 1293 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:23,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:23,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:23,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:24,756 INFO L124 PetriNetUnfolderBase]: 1942/2934 cut-off events. [2024-06-21 17:26:24,756 INFO L125 PetriNetUnfolderBase]: For 20171/20211 co-relation queries the response was YES. [2024-06-21 17:26:24,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14033 conditions, 2934 events. 1942/2934 cut-off events. For 20171/20211 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14176 event pairs, 487 based on Foata normal form. 46/2976 useless extension candidates. Maximal degree in co-relation 13987. Up to 2138 conditions per place. [2024-06-21 17:26:24,773 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 96 selfloop transitions, 71 changer transitions 0/171 dead transitions. [2024-06-21 17:26:24,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 1845 flow [2024-06-21 17:26:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:26:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:26:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 17:26:24,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:26:24,775 INFO L175 Difference]: Start difference. First operand has 98 places, 133 transitions, 1293 flow. Second operand 6 states and 114 transitions. [2024-06-21 17:26:24,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 1845 flow [2024-06-21 17:26:24,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1749 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:24,794 INFO L231 Difference]: Finished difference. Result has 100 places, 144 transitions, 1502 flow [2024-06-21 17:26:24,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1502, PETRI_PLACES=100, PETRI_TRANSITIONS=144} [2024-06-21 17:26:24,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 17:26:24,795 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 144 transitions, 1502 flow [2024-06-21 17:26:24,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:24,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:24,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:24,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:26:24,796 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:24,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -612680906, now seen corresponding path program 1 times [2024-06-21 17:26:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:24,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619822635] [2024-06-21 17:26:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:24,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:27,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:27,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619822635] [2024-06-21 17:26:27,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619822635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:27,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:27,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:27,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299307018] [2024-06-21 17:26:27,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:27,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:27,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:27,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:27,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:27,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 144 transitions, 1502 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:27,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:27,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:27,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:28,071 INFO L124 PetriNetUnfolderBase]: 1994/3009 cut-off events. [2024-06-21 17:26:28,072 INFO L125 PetriNetUnfolderBase]: For 22551/22555 co-relation queries the response was YES. [2024-06-21 17:26:28,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 3009 events. 1994/3009 cut-off events. For 22551/22555 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14537 event pairs, 567 based on Foata normal form. 20/3027 useless extension candidates. Maximal degree in co-relation 15444. Up to 2750 conditions per place. [2024-06-21 17:26:28,091 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 156 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2024-06-21 17:26:28,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 176 transitions, 1994 flow [2024-06-21 17:26:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:26:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:26:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:26:28,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-21 17:26:28,093 INFO L175 Difference]: Start difference. First operand has 100 places, 144 transitions, 1502 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:26:28,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 176 transitions, 1994 flow [2024-06-21 17:26:28,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 176 transitions, 1948 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 17:26:28,123 INFO L231 Difference]: Finished difference. Result has 105 places, 146 transitions, 1528 flow [2024-06-21 17:26:28,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1528, PETRI_PLACES=105, PETRI_TRANSITIONS=146} [2024-06-21 17:26:28,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-21 17:26:28,124 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 146 transitions, 1528 flow [2024-06-21 17:26:28,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:28,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:28,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:28,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:26:28,125 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:28,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash -299915345, now seen corresponding path program 1 times [2024-06-21 17:26:28,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:28,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006339788] [2024-06-21 17:26:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:28,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:30,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:30,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006339788] [2024-06-21 17:26:30,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006339788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:30,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:30,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:30,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451393586] [2024-06-21 17:26:30,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:30,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:30,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:30,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:30,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:30,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:30,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 146 transitions, 1528 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:30,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:30,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:30,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:31,736 INFO L124 PetriNetUnfolderBase]: 2196/3319 cut-off events. [2024-06-21 17:26:31,736 INFO L125 PetriNetUnfolderBase]: For 25561/25567 co-relation queries the response was YES. [2024-06-21 17:26:31,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16918 conditions, 3319 events. 2196/3319 cut-off events. For 25561/25567 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16481 event pairs, 577 based on Foata normal form. 14/3331 useless extension candidates. Maximal degree in co-relation 16867. Up to 2218 conditions per place. [2024-06-21 17:26:31,759 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 92 changer transitions 0/218 dead transitions. [2024-06-21 17:26:31,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 218 transitions, 2356 flow [2024-06-21 17:26:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:26:31,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:26:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-21 17:26:31,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-21 17:26:31,763 INFO L175 Difference]: Start difference. First operand has 105 places, 146 transitions, 1528 flow. Second operand 11 states and 201 transitions. [2024-06-21 17:26:31,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 218 transitions, 2356 flow [2024-06-21 17:26:31,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 218 transitions, 2310 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:31,805 INFO L231 Difference]: Finished difference. Result has 114 places, 158 transitions, 1827 flow [2024-06-21 17:26:31,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1827, PETRI_PLACES=114, PETRI_TRANSITIONS=158} [2024-06-21 17:26:31,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 17:26:31,806 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 158 transitions, 1827 flow [2024-06-21 17:26:31,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:31,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:31,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:31,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:26:31,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:31,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash 533283021, now seen corresponding path program 2 times [2024-06-21 17:26:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:31,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356516452] [2024-06-21 17:26:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:31,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:34,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:34,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356516452] [2024-06-21 17:26:34,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356516452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:34,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:34,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:34,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718599184] [2024-06-21 17:26:34,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:34,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:34,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:34,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:34,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:34,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:34,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 158 transitions, 1827 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:34,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:34,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:34,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:35,911 INFO L124 PetriNetUnfolderBase]: 2388/3619 cut-off events. [2024-06-21 17:26:35,912 INFO L125 PetriNetUnfolderBase]: For 35129/35133 co-relation queries the response was YES. [2024-06-21 17:26:35,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19905 conditions, 3619 events. 2388/3619 cut-off events. For 35129/35133 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18327 event pairs, 591 based on Foata normal form. 12/3629 useless extension candidates. Maximal degree in co-relation 19851. Up to 2669 conditions per place. [2024-06-21 17:26:35,938 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 135 selfloop transitions, 87 changer transitions 0/226 dead transitions. [2024-06-21 17:26:35,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 226 transitions, 2700 flow [2024-06-21 17:26:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:26:35,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:26:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:26:35,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 17:26:35,940 INFO L175 Difference]: Start difference. First operand has 114 places, 158 transitions, 1827 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:26:35,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 226 transitions, 2700 flow [2024-06-21 17:26:35,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 226 transitions, 2513 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 17:26:35,984 INFO L231 Difference]: Finished difference. Result has 119 places, 170 transitions, 1999 flow [2024-06-21 17:26:35,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1999, PETRI_PLACES=119, PETRI_TRANSITIONS=170} [2024-06-21 17:26:35,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-21 17:26:35,985 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 170 transitions, 1999 flow [2024-06-21 17:26:35,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:35,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:35,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:35,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:26:35,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:35,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash -296190695, now seen corresponding path program 3 times [2024-06-21 17:26:35,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:35,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998183600] [2024-06-21 17:26:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:38,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:38,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998183600] [2024-06-21 17:26:38,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998183600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:38,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:38,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:38,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124325316] [2024-06-21 17:26:38,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:38,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:38,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:38,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:38,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 170 transitions, 1999 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:38,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:38,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:38,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:40,230 INFO L124 PetriNetUnfolderBase]: 2426/3693 cut-off events. [2024-06-21 17:26:40,231 INFO L125 PetriNetUnfolderBase]: For 39116/39120 co-relation queries the response was YES. [2024-06-21 17:26:40,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21105 conditions, 3693 events. 2426/3693 cut-off events. For 39116/39120 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 18954 event pairs, 555 based on Foata normal form. 12/3703 useless extension candidates. Maximal degree in co-relation 21048. Up to 2703 conditions per place. [2024-06-21 17:26:40,255 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 141 selfloop transitions, 96 changer transitions 0/241 dead transitions. [2024-06-21 17:26:40,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 241 transitions, 2842 flow [2024-06-21 17:26:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:26:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:26:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-21 17:26:40,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-21 17:26:40,258 INFO L175 Difference]: Start difference. First operand has 119 places, 170 transitions, 1999 flow. Second operand 12 states and 215 transitions. [2024-06-21 17:26:40,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 241 transitions, 2842 flow [2024-06-21 17:26:40,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 241 transitions, 2718 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:26:40,313 INFO L231 Difference]: Finished difference. Result has 125 places, 177 transitions, 2175 flow [2024-06-21 17:26:40,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2175, PETRI_PLACES=125, PETRI_TRANSITIONS=177} [2024-06-21 17:26:40,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 17:26:40,314 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 177 transitions, 2175 flow [2024-06-21 17:26:40,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:40,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:40,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:40,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:26:40,315 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:40,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:40,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1813514723, now seen corresponding path program 4 times [2024-06-21 17:26:40,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:40,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604717902] [2024-06-21 17:26:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:40,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604717902] [2024-06-21 17:26:42,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604717902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:42,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:42,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:42,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016410783] [2024-06-21 17:26:42,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:42,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:42,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:42,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:42,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 177 transitions, 2175 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:42,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:42,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:42,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:44,207 INFO L124 PetriNetUnfolderBase]: 2556/3906 cut-off events. [2024-06-21 17:26:44,207 INFO L125 PetriNetUnfolderBase]: For 45642/45692 co-relation queries the response was YES. [2024-06-21 17:26:44,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22989 conditions, 3906 events. 2556/3906 cut-off events. For 45642/45692 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20351 event pairs, 484 based on Foata normal form. 46/3948 useless extension candidates. Maximal degree in co-relation 22930. Up to 2249 conditions per place. [2024-06-21 17:26:44,233 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 121 changer transitions 0/248 dead transitions. [2024-06-21 17:26:44,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 248 transitions, 3168 flow [2024-06-21 17:26:44,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 17:26:44,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-21 17:26:44,236 INFO L175 Difference]: Start difference. First operand has 125 places, 177 transitions, 2175 flow. Second operand 9 states and 177 transitions. [2024-06-21 17:26:44,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 248 transitions, 3168 flow [2024-06-21 17:26:44,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 248 transitions, 2948 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 17:26:44,300 INFO L231 Difference]: Finished difference. Result has 125 places, 193 transitions, 2460 flow [2024-06-21 17:26:44,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2460, PETRI_PLACES=125, PETRI_TRANSITIONS=193} [2024-06-21 17:26:44,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 17:26:44,300 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 193 transitions, 2460 flow [2024-06-21 17:26:44,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:44,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:44,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:44,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:26:44,301 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:44,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:44,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1820866373, now seen corresponding path program 5 times [2024-06-21 17:26:44,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:44,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376809315] [2024-06-21 17:26:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:44,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:46,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:46,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376809315] [2024-06-21 17:26:46,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376809315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:46,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:46,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:46,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023392508] [2024-06-21 17:26:46,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:46,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:46,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:46,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:46,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 193 transitions, 2460 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:46,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:46,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:46,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:48,269 INFO L124 PetriNetUnfolderBase]: 2806/4287 cut-off events. [2024-06-21 17:26:48,269 INFO L125 PetriNetUnfolderBase]: For 55084/55088 co-relation queries the response was YES. [2024-06-21 17:26:48,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26499 conditions, 4287 events. 2806/4287 cut-off events. For 55084/55088 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22773 event pairs, 616 based on Foata normal form. 12/4297 useless extension candidates. Maximal degree in co-relation 26438. Up to 3001 conditions per place. [2024-06-21 17:26:48,298 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 110 changer transitions 0/271 dead transitions. [2024-06-21 17:26:48,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 271 transitions, 3717 flow [2024-06-21 17:26:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:26:48,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 17:26:48,300 INFO L175 Difference]: Start difference. First operand has 125 places, 193 transitions, 2460 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:26:48,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 271 transitions, 3717 flow [2024-06-21 17:26:48,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 271 transitions, 3533 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:48,391 INFO L231 Difference]: Finished difference. Result has 132 places, 224 transitions, 3114 flow [2024-06-21 17:26:48,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2296, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3114, PETRI_PLACES=132, PETRI_TRANSITIONS=224} [2024-06-21 17:26:48,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 17:26:48,392 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 224 transitions, 3114 flow [2024-06-21 17:26:48,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:48,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:48,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:48,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:26:48,392 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:48,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:48,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1820871953, now seen corresponding path program 6 times [2024-06-21 17:26:48,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:48,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255489801] [2024-06-21 17:26:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:48,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:50,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:50,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255489801] [2024-06-21 17:26:50,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255489801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:50,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:50,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:50,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815887686] [2024-06-21 17:26:50,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:50,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:50,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:50,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:50,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:50,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 224 transitions, 3114 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:50,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:50,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:50,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:52,342 INFO L124 PetriNetUnfolderBase]: 2792/4269 cut-off events. [2024-06-21 17:26:52,342 INFO L125 PetriNetUnfolderBase]: For 59216/59220 co-relation queries the response was YES. [2024-06-21 17:26:52,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27781 conditions, 4269 events. 2792/4269 cut-off events. For 59216/59220 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 22691 event pairs, 674 based on Foata normal form. 12/4279 useless extension candidates. Maximal degree in co-relation 27716. Up to 2995 conditions per place. [2024-06-21 17:26:52,370 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 161 selfloop transitions, 109 changer transitions 0/274 dead transitions. [2024-06-21 17:26:52,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 274 transitions, 3904 flow [2024-06-21 17:26:52,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:26:52,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:26:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:26:52,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 17:26:52,372 INFO L175 Difference]: Start difference. First operand has 132 places, 224 transitions, 3114 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:26:52,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 274 transitions, 3904 flow [2024-06-21 17:26:52,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 274 transitions, 3733 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:52,488 INFO L231 Difference]: Finished difference. Result has 137 places, 226 transitions, 3274 flow [2024-06-21 17:26:52,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3274, PETRI_PLACES=137, PETRI_TRANSITIONS=226} [2024-06-21 17:26:52,488 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 17:26:52,488 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 226 transitions, 3274 flow [2024-06-21 17:26:52,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:52,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:52,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:52,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:26:52,489 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:52,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1005014767, now seen corresponding path program 1 times [2024-06-21 17:26:52,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:52,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187811309] [2024-06-21 17:26:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:52,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:53,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:53,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187811309] [2024-06-21 17:26:53,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187811309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:53,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:53,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:26:53,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984256505] [2024-06-21 17:26:53,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:53,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:26:53,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:53,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:26:53,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:26:53,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:26:53,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 226 transitions, 3274 flow. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:53,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:53,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:26:53,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:54,685 INFO L124 PetriNetUnfolderBase]: 2642/4041 cut-off events. [2024-06-21 17:26:54,686 INFO L125 PetriNetUnfolderBase]: For 66007/66033 co-relation queries the response was YES. [2024-06-21 17:26:54,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27508 conditions, 4041 events. 2642/4041 cut-off events. For 66007/66033 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 21370 event pairs, 735 based on Foata normal form. 26/4038 useless extension candidates. Maximal degree in co-relation 27441. Up to 3745 conditions per place. [2024-06-21 17:26:54,718 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 209 selfloop transitions, 15 changer transitions 0/239 dead transitions. [2024-06-21 17:26:54,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 239 transitions, 3756 flow [2024-06-21 17:26:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:26:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:26:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 17:26:54,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:26:54,719 INFO L175 Difference]: Start difference. First operand has 137 places, 226 transitions, 3274 flow. Second operand 5 states and 90 transitions. [2024-06-21 17:26:54,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 239 transitions, 3756 flow [2024-06-21 17:26:54,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 239 transitions, 3633 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 17:26:54,822 INFO L231 Difference]: Finished difference. Result has 137 places, 226 transitions, 3190 flow [2024-06-21 17:26:54,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3190, PETRI_PLACES=137, PETRI_TRANSITIONS=226} [2024-06-21 17:26:54,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-21 17:26:54,823 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 226 transitions, 3190 flow [2024-06-21 17:26:54,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:54,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:54,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:54,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:26:54,823 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:54,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash -710301859, now seen corresponding path program 1 times [2024-06-21 17:26:54,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:54,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582482390] [2024-06-21 17:26:54,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:54,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:26:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:26:57,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:26:57,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582482390] [2024-06-21 17:26:57,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582482390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:26:57,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:26:57,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:26:57,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531329261] [2024-06-21 17:26:57,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:26:57,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:26:57,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:26:57,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:26:57,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:26:57,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:26:57,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 226 transitions, 3190 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:57,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:26:57,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:26:57,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:26:58,666 INFO L124 PetriNetUnfolderBase]: 2748/4197 cut-off events. [2024-06-21 17:26:58,666 INFO L125 PetriNetUnfolderBase]: For 66489/66493 co-relation queries the response was YES. [2024-06-21 17:26:58,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27985 conditions, 4197 events. 2748/4197 cut-off events. For 66489/66493 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22239 event pairs, 596 based on Foata normal form. 8/4203 useless extension candidates. Maximal degree in co-relation 27917. Up to 3719 conditions per place. [2024-06-21 17:26:58,695 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 53 changer transitions 0/269 dead transitions. [2024-06-21 17:26:58,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 269 transitions, 3996 flow [2024-06-21 17:26:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:26:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:26:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:26:58,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 17:26:58,697 INFO L175 Difference]: Start difference. First operand has 137 places, 226 transitions, 3190 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:26:58,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 269 transitions, 3996 flow [2024-06-21 17:26:58,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 269 transitions, 3959 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 17:26:58,792 INFO L231 Difference]: Finished difference. Result has 141 places, 230 transitions, 3358 flow [2024-06-21 17:26:58,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3153, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3358, PETRI_PLACES=141, PETRI_TRANSITIONS=230} [2024-06-21 17:26:58,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-21 17:26:58,793 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 230 transitions, 3358 flow [2024-06-21 17:26:58,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:26:58,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:26:58,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:26:58,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:26:58,794 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:26:58,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:26:58,794 INFO L85 PathProgramCache]: Analyzing trace with hash 102471679, now seen corresponding path program 2 times [2024-06-21 17:26:58,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:26:58,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020282813] [2024-06-21 17:26:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:26:58,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:26:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:01,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:01,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020282813] [2024-06-21 17:27:01,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020282813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:01,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:27:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345543956] [2024-06-21 17:27:01,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:01,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:27:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:27:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:27:01,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:01,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 230 transitions, 3358 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:01,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:01,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:01,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:02,987 INFO L124 PetriNetUnfolderBase]: 2768/4229 cut-off events. [2024-06-21 17:27:02,987 INFO L125 PetriNetUnfolderBase]: For 72168/72172 co-relation queries the response was YES. [2024-06-21 17:27:03,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28667 conditions, 4229 events. 2768/4229 cut-off events. For 72168/72172 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22453 event pairs, 706 based on Foata normal form. 8/4235 useless extension candidates. Maximal degree in co-relation 28599. Up to 3845 conditions per place. [2024-06-21 17:27:03,020 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 214 selfloop transitions, 50 changer transitions 0/268 dead transitions. [2024-06-21 17:27:03,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 268 transitions, 4044 flow [2024-06-21 17:27:03,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:27:03,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 17:27:03,023 INFO L175 Difference]: Start difference. First operand has 141 places, 230 transitions, 3358 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:27:03,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 268 transitions, 4044 flow [2024-06-21 17:27:03,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 268 transitions, 3915 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 17:27:03,200 INFO L231 Difference]: Finished difference. Result has 145 places, 232 transitions, 3388 flow [2024-06-21 17:27:03,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3388, PETRI_PLACES=145, PETRI_TRANSITIONS=232} [2024-06-21 17:27:03,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 17:27:03,201 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 232 transitions, 3388 flow [2024-06-21 17:27:03,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:03,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:03,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:03,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:27:03,202 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:03,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash -648099329, now seen corresponding path program 3 times [2024-06-21 17:27:03,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:03,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887010165] [2024-06-21 17:27:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:03,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:06,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:06,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887010165] [2024-06-21 17:27:06,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887010165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:06,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:06,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:27:06,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080330292] [2024-06-21 17:27:06,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:06,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:27:06,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:27:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:27:06,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:06,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 232 transitions, 3388 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:06,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:06,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:06,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:07,370 INFO L124 PetriNetUnfolderBase]: 2788/4261 cut-off events. [2024-06-21 17:27:07,370 INFO L125 PetriNetUnfolderBase]: For 76185/76187 co-relation queries the response was YES. [2024-06-21 17:27:07,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28947 conditions, 4261 events. 2788/4261 cut-off events. For 76185/76187 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22673 event pairs, 711 based on Foata normal form. 6/4265 useless extension candidates. Maximal degree in co-relation 28877. Up to 3924 conditions per place. [2024-06-21 17:27:07,404 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 45 changer transitions 0/268 dead transitions. [2024-06-21 17:27:07,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 268 transitions, 4075 flow [2024-06-21 17:27:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:27:07,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 17:27:07,406 INFO L175 Difference]: Start difference. First operand has 145 places, 232 transitions, 3388 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:27:07,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 268 transitions, 4075 flow [2024-06-21 17:27:07,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 268 transitions, 3950 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:27:07,533 INFO L231 Difference]: Finished difference. Result has 148 places, 235 transitions, 3434 flow [2024-06-21 17:27:07,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3434, PETRI_PLACES=148, PETRI_TRANSITIONS=235} [2024-06-21 17:27:07,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 17:27:07,534 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 235 transitions, 3434 flow [2024-06-21 17:27:07,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:07,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:07,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:07,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:27:07,535 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:07,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -647914631, now seen corresponding path program 1 times [2024-06-21 17:27:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:07,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640303027] [2024-06-21 17:27:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:07,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:10,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:10,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640303027] [2024-06-21 17:27:10,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640303027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:10,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:10,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:10,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609027066] [2024-06-21 17:27:10,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:10,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:10,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:10,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:10,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 235 transitions, 3434 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:10,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:10,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:10,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:12,388 INFO L124 PetriNetUnfolderBase]: 2868/4323 cut-off events. [2024-06-21 17:27:12,388 INFO L125 PetriNetUnfolderBase]: For 85101/85103 co-relation queries the response was YES. [2024-06-21 17:27:12,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29551 conditions, 4323 events. 2868/4323 cut-off events. For 85101/85103 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22524 event pairs, 577 based on Foata normal form. 18/4339 useless extension candidates. Maximal degree in co-relation 29479. Up to 3523 conditions per place. [2024-06-21 17:27:12,422 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 83 changer transitions 0/289 dead transitions. [2024-06-21 17:27:12,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 289 transitions, 4296 flow [2024-06-21 17:27:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:27:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:27:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 17:27:12,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-21 17:27:12,424 INFO L175 Difference]: Start difference. First operand has 148 places, 235 transitions, 3434 flow. Second operand 10 states and 179 transitions. [2024-06-21 17:27:12,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 289 transitions, 4296 flow [2024-06-21 17:27:12,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 289 transitions, 4188 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 17:27:12,548 INFO L231 Difference]: Finished difference. Result has 153 places, 237 transitions, 3548 flow [2024-06-21 17:27:12,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3548, PETRI_PLACES=153, PETRI_TRANSITIONS=237} [2024-06-21 17:27:12,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-21 17:27:12,549 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 237 transitions, 3548 flow [2024-06-21 17:27:12,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:12,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:12,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:12,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:27:12,549 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:12,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash -612459491, now seen corresponding path program 4 times [2024-06-21 17:27:12,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:12,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093557490] [2024-06-21 17:27:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:12,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:14,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:14,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093557490] [2024-06-21 17:27:14,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093557490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:14,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:14,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:27:14,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363628563] [2024-06-21 17:27:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:14,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:27:14,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:27:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:27:14,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:14,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 237 transitions, 3548 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:14,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:14,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:14,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:16,287 INFO L124 PetriNetUnfolderBase]: 2860/4377 cut-off events. [2024-06-21 17:27:16,288 INFO L125 PetriNetUnfolderBase]: For 87541/87547 co-relation queries the response was YES. [2024-06-21 17:27:16,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30238 conditions, 4377 events. 2860/4377 cut-off events. For 87541/87547 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23400 event pairs, 610 based on Foata normal form. 10/4385 useless extension candidates. Maximal degree in co-relation 30165. Up to 3934 conditions per place. [2024-06-21 17:27:16,327 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 52 changer transitions 0/268 dead transitions. [2024-06-21 17:27:16,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 268 transitions, 4170 flow [2024-06-21 17:27:16,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:27:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:27:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:27:16,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:27:16,329 INFO L175 Difference]: Start difference. First operand has 153 places, 237 transitions, 3548 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:27:16,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 268 transitions, 4170 flow [2024-06-21 17:27:16,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 268 transitions, 3960 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 17:27:16,485 INFO L231 Difference]: Finished difference. Result has 152 places, 237 transitions, 3457 flow [2024-06-21 17:27:16,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3338, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3457, PETRI_PLACES=152, PETRI_TRANSITIONS=237} [2024-06-21 17:27:16,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-21 17:27:16,486 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 237 transitions, 3457 flow [2024-06-21 17:27:16,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:16,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:16,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:16,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:27:16,487 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:16,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:16,487 INFO L85 PathProgramCache]: Analyzing trace with hash -612274793, now seen corresponding path program 2 times [2024-06-21 17:27:16,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:16,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60488977] [2024-06-21 17:27:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:16,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:19,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:19,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60488977] [2024-06-21 17:27:19,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60488977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:19,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:19,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:19,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035671172] [2024-06-21 17:27:19,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:19,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:19,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:19,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:19,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 237 transitions, 3457 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:19,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:19,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:19,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:20,626 INFO L124 PetriNetUnfolderBase]: 2940/4439 cut-off events. [2024-06-21 17:27:20,627 INFO L125 PetriNetUnfolderBase]: For 95221/95227 co-relation queries the response was YES. [2024-06-21 17:27:20,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30411 conditions, 4439 events. 2940/4439 cut-off events. For 95221/95227 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23235 event pairs, 561 based on Foata normal form. 22/4459 useless extension candidates. Maximal degree in co-relation 30337. Up to 3529 conditions per place. [2024-06-21 17:27:20,662 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 82 changer transitions 0/277 dead transitions. [2024-06-21 17:27:20,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 277 transitions, 4215 flow [2024-06-21 17:27:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:27:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:27:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:27:20,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:27:20,664 INFO L175 Difference]: Start difference. First operand has 152 places, 237 transitions, 3457 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:27:20,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 277 transitions, 4215 flow [2024-06-21 17:27:20,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 277 transitions, 4098 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:27:20,802 INFO L231 Difference]: Finished difference. Result has 154 places, 239 transitions, 3572 flow [2024-06-21 17:27:20,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3572, PETRI_PLACES=154, PETRI_TRANSITIONS=239} [2024-06-21 17:27:20,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-21 17:27:20,803 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 239 transitions, 3572 flow [2024-06-21 17:27:20,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:20,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:20,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:20,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:27:20,804 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:20,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash -376099433, now seen corresponding path program 3 times [2024-06-21 17:27:20,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:20,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852547986] [2024-06-21 17:27:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:20,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:23,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852547986] [2024-06-21 17:27:23,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852547986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:23,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:23,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:23,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113906158] [2024-06-21 17:27:23,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:23,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:23,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:23,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 239 transitions, 3572 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:23,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:23,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:23,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:25,099 INFO L124 PetriNetUnfolderBase]: 3004/4618 cut-off events. [2024-06-21 17:27:25,099 INFO L125 PetriNetUnfolderBase]: For 99496/99543 co-relation queries the response was YES. [2024-06-21 17:27:25,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31603 conditions, 4618 events. 3004/4618 cut-off events. For 99496/99543 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25003 event pairs, 494 based on Foata normal form. 51/4665 useless extension candidates. Maximal degree in co-relation 31528. Up to 3609 conditions per place. [2024-06-21 17:27:25,140 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 84 changer transitions 0/279 dead transitions. [2024-06-21 17:27:25,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 279 transitions, 4394 flow [2024-06-21 17:27:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:27:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:27:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 17:27:25,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-21 17:27:25,143 INFO L175 Difference]: Start difference. First operand has 154 places, 239 transitions, 3572 flow. Second operand 7 states and 134 transitions. [2024-06-21 17:27:25,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 279 transitions, 4394 flow [2024-06-21 17:27:25,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 279 transitions, 4204 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:27:25,303 INFO L231 Difference]: Finished difference. Result has 155 places, 241 transitions, 3610 flow [2024-06-21 17:27:25,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3610, PETRI_PLACES=155, PETRI_TRANSITIONS=241} [2024-06-21 17:27:25,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 17:27:25,304 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 241 transitions, 3610 flow [2024-06-21 17:27:25,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:25,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:25,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:25,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:27:25,304 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:25,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash -375802763, now seen corresponding path program 4 times [2024-06-21 17:27:25,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:25,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747073679] [2024-06-21 17:27:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:25,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:28,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:28,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747073679] [2024-06-21 17:27:28,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747073679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:28,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:28,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703959687] [2024-06-21 17:27:28,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:28,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:28,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:28,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:28,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:28,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:28,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 241 transitions, 3610 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:28,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:28,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:28,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:29,834 INFO L124 PetriNetUnfolderBase]: 3112/4782 cut-off events. [2024-06-21 17:27:29,834 INFO L125 PetriNetUnfolderBase]: For 102018/102065 co-relation queries the response was YES. [2024-06-21 17:27:29,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32488 conditions, 4782 events. 3112/4782 cut-off events. For 102018/102065 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26004 event pairs, 478 based on Foata normal form. 51/4829 useless extension candidates. Maximal degree in co-relation 32412. Up to 3261 conditions per place. [2024-06-21 17:27:29,878 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 92 changer transitions 0/287 dead transitions. [2024-06-21 17:27:29,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 287 transitions, 4536 flow [2024-06-21 17:27:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:27:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:27:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 17:27:29,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-21 17:27:29,879 INFO L175 Difference]: Start difference. First operand has 155 places, 241 transitions, 3610 flow. Second operand 7 states and 138 transitions. [2024-06-21 17:27:29,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 287 transitions, 4536 flow [2024-06-21 17:27:30,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 287 transitions, 4340 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:27:30,050 INFO L231 Difference]: Finished difference. Result has 157 places, 244 transitions, 3663 flow [2024-06-21 17:27:30,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3663, PETRI_PLACES=157, PETRI_TRANSITIONS=244} [2024-06-21 17:27:30,050 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-21 17:27:30,050 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 244 transitions, 3663 flow [2024-06-21 17:27:30,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:30,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:30,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:30,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:27:30,051 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:30,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:30,051 INFO L85 PathProgramCache]: Analyzing trace with hash 124123922, now seen corresponding path program 1 times [2024-06-21 17:27:30,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:30,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524491700] [2024-06-21 17:27:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:30,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:32,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:32,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524491700] [2024-06-21 17:27:32,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524491700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:32,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:32,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857242496] [2024-06-21 17:27:32,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:32,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:32,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:32,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:32,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 244 transitions, 3663 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:32,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:32,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:32,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:34,752 INFO L124 PetriNetUnfolderBase]: 4039/6310 cut-off events. [2024-06-21 17:27:34,752 INFO L125 PetriNetUnfolderBase]: For 163235/163241 co-relation queries the response was YES. [2024-06-21 17:27:34,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42048 conditions, 6310 events. 4039/6310 cut-off events. For 163235/163241 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36998 event pairs, 957 based on Foata normal form. 62/6370 useless extension candidates. Maximal degree in co-relation 41971. Up to 2485 conditions per place. [2024-06-21 17:27:34,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 186 selfloop transitions, 142 changer transitions 0/332 dead transitions. [2024-06-21 17:27:34,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 332 transitions, 4997 flow [2024-06-21 17:27:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:27:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:27:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-21 17:27:34,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49002217294900224 [2024-06-21 17:27:34,896 INFO L175 Difference]: Start difference. First operand has 157 places, 244 transitions, 3663 flow. Second operand 11 states and 221 transitions. [2024-06-21 17:27:34,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 332 transitions, 4997 flow [2024-06-21 17:27:35,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 332 transitions, 4863 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 17:27:35,092 INFO L231 Difference]: Finished difference. Result has 167 places, 247 transitions, 3954 flow [2024-06-21 17:27:35,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3529, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3954, PETRI_PLACES=167, PETRI_TRANSITIONS=247} [2024-06-21 17:27:35,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-21 17:27:35,093 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 247 transitions, 3954 flow [2024-06-21 17:27:35,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:35,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:35,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:35,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:27:35,094 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:35,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:35,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2018007630, now seen corresponding path program 2 times [2024-06-21 17:27:35,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:35,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944213435] [2024-06-21 17:27:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:38,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:38,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944213435] [2024-06-21 17:27:38,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944213435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:38,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:38,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:38,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61356388] [2024-06-21 17:27:38,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:38,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:38,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:38,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:38,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:38,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:38,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 247 transitions, 3954 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:38,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:38,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:38,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:40,522 INFO L124 PetriNetUnfolderBase]: 4688/7369 cut-off events. [2024-06-21 17:27:40,522 INFO L125 PetriNetUnfolderBase]: For 211266/211272 co-relation queries the response was YES. [2024-06-21 17:27:40,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49992 conditions, 7369 events. 4688/7369 cut-off events. For 211266/211272 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 45258 event pairs, 1454 based on Foata normal form. 62/7429 useless extension candidates. Maximal degree in co-relation 49911. Up to 4597 conditions per place. [2024-06-21 17:27:40,580 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 186 selfloop transitions, 142 changer transitions 0/332 dead transitions. [2024-06-21 17:27:40,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 332 transitions, 5248 flow [2024-06-21 17:27:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:27:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:27:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-21 17:27:40,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-21 17:27:40,583 INFO L175 Difference]: Start difference. First operand has 167 places, 247 transitions, 3954 flow. Second operand 12 states and 232 transitions. [2024-06-21 17:27:40,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 332 transitions, 5248 flow [2024-06-21 17:27:41,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 332 transitions, 4987 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:27:41,017 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 4056 flow [2024-06-21 17:27:41,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3693, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4056, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-06-21 17:27:41,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-21 17:27:41,018 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 4056 flow [2024-06-21 17:27:41,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:41,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:41,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:41,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:27:41,018 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:41,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:41,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1118196244, now seen corresponding path program 3 times [2024-06-21 17:27:41,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:41,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810730569] [2024-06-21 17:27:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:41,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:43,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810730569] [2024-06-21 17:27:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810730569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:43,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:43,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175624707] [2024-06-21 17:27:43,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:43,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:43,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:43,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:43,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 4056 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:43,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:43,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:43,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:46,161 INFO L124 PetriNetUnfolderBase]: 4840/7633 cut-off events. [2024-06-21 17:27:46,161 INFO L125 PetriNetUnfolderBase]: For 221234/221240 co-relation queries the response was YES. [2024-06-21 17:27:46,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51084 conditions, 7633 events. 4840/7633 cut-off events. For 221234/221240 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 47396 event pairs, 1675 based on Foata normal form. 70/7701 useless extension candidates. Maximal degree in co-relation 51001. Up to 5543 conditions per place. [2024-06-21 17:27:46,230 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 174 selfloop transitions, 142 changer transitions 0/320 dead transitions. [2024-06-21 17:27:46,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 320 transitions, 5116 flow [2024-06-21 17:27:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:27:46,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:27:46,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2024-06-21 17:27:46,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4491869918699187 [2024-06-21 17:27:46,233 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 4056 flow. Second operand 12 states and 221 transitions. [2024-06-21 17:27:46,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 320 transitions, 5116 flow [2024-06-21 17:27:46,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 320 transitions, 4805 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 17:27:46,565 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 4079 flow [2024-06-21 17:27:46,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4079, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-21 17:27:46,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-21 17:27:46,571 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 4079 flow [2024-06-21 17:27:46,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:46,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:46,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:27:46,572 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:46,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:46,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1176747412, now seen corresponding path program 4 times [2024-06-21 17:27:46,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:46,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164856178] [2024-06-21 17:27:46,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:46,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:49,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:49,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164856178] [2024-06-21 17:27:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164856178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:49,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:49,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:49,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746728836] [2024-06-21 17:27:49,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:49,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:49,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:49,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:49,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 4079 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:49,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:49,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:49,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:51,947 INFO L124 PetriNetUnfolderBase]: 5116/8086 cut-off events. [2024-06-21 17:27:51,948 INFO L125 PetriNetUnfolderBase]: For 237116/237118 co-relation queries the response was YES. [2024-06-21 17:27:51,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53237 conditions, 8086 events. 5116/8086 cut-off events. For 237116/237118 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50985 event pairs, 1826 based on Foata normal form. 66/8150 useless extension candidates. Maximal degree in co-relation 53153. Up to 6283 conditions per place. [2024-06-21 17:27:52,025 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 192 selfloop transitions, 120 changer transitions 1/317 dead transitions. [2024-06-21 17:27:52,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 317 transitions, 5133 flow [2024-06-21 17:27:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:27:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:27:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 17:27:52,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 17:27:52,027 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 4079 flow. Second operand 11 states and 205 transitions. [2024-06-21 17:27:52,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 317 transitions, 5133 flow [2024-06-21 17:27:52,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 317 transitions, 4821 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 17:27:52,477 INFO L231 Difference]: Finished difference. Result has 177 places, 250 transitions, 4049 flow [2024-06-21 17:27:52,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3767, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4049, PETRI_PLACES=177, PETRI_TRANSITIONS=250} [2024-06-21 17:27:52,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 17:27:52,478 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 250 transitions, 4049 flow [2024-06-21 17:27:52,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:52,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:52,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:52,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:27:52,479 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:52,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:52,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1176895282, now seen corresponding path program 5 times [2024-06-21 17:27:52,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:52,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923693185] [2024-06-21 17:27:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:52,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:27:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:27:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:27:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923693185] [2024-06-21 17:27:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923693185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:27:55,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:27:55,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:27:55,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906627219] [2024-06-21 17:27:55,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:27:55,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:27:55,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:27:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:27:55,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:27:55,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:27:55,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 250 transitions, 4049 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:55,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:27:55,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:27:55,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:27:58,189 INFO L124 PetriNetUnfolderBase]: 5761/9141 cut-off events. [2024-06-21 17:27:58,189 INFO L125 PetriNetUnfolderBase]: For 281853/281855 co-relation queries the response was YES. [2024-06-21 17:27:58,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59903 conditions, 9141 events. 5761/9141 cut-off events. For 281853/281855 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 59352 event pairs, 2063 based on Foata normal form. 58/9197 useless extension candidates. Maximal degree in co-relation 59818. Up to 6018 conditions per place. [2024-06-21 17:27:58,276 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 117 changer transitions 0/327 dead transitions. [2024-06-21 17:27:58,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 327 transitions, 5355 flow [2024-06-21 17:27:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:27:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:27:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-21 17:27:58,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678492239467849 [2024-06-21 17:27:58,278 INFO L175 Difference]: Start difference. First operand has 177 places, 250 transitions, 4049 flow. Second operand 11 states and 211 transitions. [2024-06-21 17:27:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 327 transitions, 5355 flow [2024-06-21 17:27:58,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 327 transitions, 5093 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 17:27:58,789 INFO L231 Difference]: Finished difference. Result has 180 places, 252 transitions, 4137 flow [2024-06-21 17:27:58,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3787, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4137, PETRI_PLACES=180, PETRI_TRANSITIONS=252} [2024-06-21 17:27:58,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-21 17:27:58,790 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 252 transitions, 4137 flow [2024-06-21 17:27:58,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:27:58,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:27:58,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:27:58,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:27:58,790 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:27:58,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:27:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1171385032, now seen corresponding path program 6 times [2024-06-21 17:27:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:27:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357449298] [2024-06-21 17:27:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:27:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:27:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357449298] [2024-06-21 17:28:01,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357449298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:01,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:01,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845702596] [2024-06-21 17:28:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:01,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:01,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:01,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:01,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 252 transitions, 4137 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:01,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:01,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:01,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:04,479 INFO L124 PetriNetUnfolderBase]: 5913/9405 cut-off events. [2024-06-21 17:28:04,479 INFO L125 PetriNetUnfolderBase]: For 296232/296234 co-relation queries the response was YES. [2024-06-21 17:28:04,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60535 conditions, 9405 events. 5913/9405 cut-off events. For 296232/296234 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 61828 event pairs, 2277 based on Foata normal form. 66/9469 useless extension candidates. Maximal degree in co-relation 60448. Up to 7602 conditions per place. [2024-06-21 17:28:04,557 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 123 changer transitions 1/329 dead transitions. [2024-06-21 17:28:04,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 329 transitions, 5257 flow [2024-06-21 17:28:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:28:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:28:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2024-06-21 17:28:04,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4427767354596623 [2024-06-21 17:28:04,558 INFO L175 Difference]: Start difference. First operand has 180 places, 252 transitions, 4137 flow. Second operand 13 states and 236 transitions. [2024-06-21 17:28:04,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 329 transitions, 5257 flow [2024-06-21 17:28:04,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 329 transitions, 5017 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 17:28:04,949 INFO L231 Difference]: Finished difference. Result has 185 places, 252 transitions, 4187 flow [2024-06-21 17:28:04,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3897, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4187, PETRI_PLACES=185, PETRI_TRANSITIONS=252} [2024-06-21 17:28:04,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-21 17:28:04,950 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 252 transitions, 4187 flow [2024-06-21 17:28:04,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:04,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:04,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:04,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:28:04,950 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:04,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:04,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1171169830, now seen corresponding path program 1 times [2024-06-21 17:28:04,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:04,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906713324] [2024-06-21 17:28:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:04,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:08,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906713324] [2024-06-21 17:28:08,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906713324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:08,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:08,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:08,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140897290] [2024-06-21 17:28:08,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:08,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:08,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:08,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:08,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:08,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:08,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 252 transitions, 4187 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 17:28:08,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:08,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:08,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:11,053 INFO L124 PetriNetUnfolderBase]: 6101/9773 cut-off events. [2024-06-21 17:28:11,054 INFO L125 PetriNetUnfolderBase]: For 305848/305850 co-relation queries the response was YES. [2024-06-21 17:28:11,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62415 conditions, 9773 events. 6101/9773 cut-off events. For 305848/305850 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 65351 event pairs, 2196 based on Foata normal form. 50/9821 useless extension candidates. Maximal degree in co-relation 62327. Up to 6850 conditions per place. [2024-06-21 17:28:11,158 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 204 selfloop transitions, 126 changer transitions 1/335 dead transitions. [2024-06-21 17:28:11,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 335 transitions, 5369 flow [2024-06-21 17:28:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:28:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:28:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 240 transitions. [2024-06-21 17:28:11,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450281425891182 [2024-06-21 17:28:11,169 INFO L175 Difference]: Start difference. First operand has 185 places, 252 transitions, 4187 flow. Second operand 13 states and 240 transitions. [2024-06-21 17:28:11,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 335 transitions, 5369 flow [2024-06-21 17:28:11,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 335 transitions, 5097 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-21 17:28:11,834 INFO L231 Difference]: Finished difference. Result has 187 places, 252 transitions, 4200 flow [2024-06-21 17:28:11,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4200, PETRI_PLACES=187, PETRI_TRANSITIONS=252} [2024-06-21 17:28:11,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-21 17:28:11,834 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 252 transitions, 4200 flow [2024-06-21 17:28:11,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 17:28:11,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:11,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:11,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:28:11,835 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:11,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1058520622, now seen corresponding path program 1 times [2024-06-21 17:28:11,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:11,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234586891] [2024-06-21 17:28:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:13,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:13,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234586891] [2024-06-21 17:28:13,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234586891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:13,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:13,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:28:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239321741] [2024-06-21 17:28:13,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:13,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:28:13,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:28:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:28:13,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:28:13,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 252 transitions, 4200 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:13,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:13,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:28:13,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:15,522 INFO L124 PetriNetUnfolderBase]: 5682/9075 cut-off events. [2024-06-21 17:28:15,522 INFO L125 PetriNetUnfolderBase]: For 287271/287290 co-relation queries the response was YES. [2024-06-21 17:28:15,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57441 conditions, 9075 events. 5682/9075 cut-off events. For 287271/287290 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 59908 event pairs, 2423 based on Foata normal form. 41/9087 useless extension candidates. Maximal degree in co-relation 57352. Up to 8445 conditions per place. [2024-06-21 17:28:15,616 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 175 selfloop transitions, 67 changer transitions 20/278 dead transitions. [2024-06-21 17:28:15,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 278 transitions, 4798 flow [2024-06-21 17:28:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:28:15,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:28:15,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:28:15,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 17:28:15,617 INFO L175 Difference]: Start difference. First operand has 187 places, 252 transitions, 4200 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:28:15,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 278 transitions, 4798 flow [2024-06-21 17:28:16,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 278 transitions, 4478 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-21 17:28:16,232 INFO L231 Difference]: Finished difference. Result has 183 places, 232 transitions, 3635 flow [2024-06-21 17:28:16,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3880, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3635, PETRI_PLACES=183, PETRI_TRANSITIONS=232} [2024-06-21 17:28:16,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-21 17:28:16,233 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 232 transitions, 3635 flow [2024-06-21 17:28:16,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:16,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:16,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:16,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:28:16,234 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:16,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1800863654, now seen corresponding path program 7 times [2024-06-21 17:28:16,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:16,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467341962] [2024-06-21 17:28:16,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:16,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:19,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:19,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467341962] [2024-06-21 17:28:19,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467341962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:19,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:19,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:19,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827663512] [2024-06-21 17:28:19,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:19,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:19,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:19,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:19,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 232 transitions, 3635 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:19,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:19,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:19,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:21,595 INFO L124 PetriNetUnfolderBase]: 5523/8844 cut-off events. [2024-06-21 17:28:21,596 INFO L125 PetriNetUnfolderBase]: For 313112/313118 co-relation queries the response was YES. [2024-06-21 17:28:21,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55467 conditions, 8844 events. 5523/8844 cut-off events. For 313112/313118 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 58156 event pairs, 2240 based on Foata normal form. 70/8912 useless extension candidates. Maximal degree in co-relation 55377. Up to 7238 conditions per place. [2024-06-21 17:28:21,669 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 175 selfloop transitions, 105 changer transitions 5/289 dead transitions. [2024-06-21 17:28:21,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 289 transitions, 4507 flow [2024-06-21 17:28:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:28:21,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 17:28:21,670 INFO L175 Difference]: Start difference. First operand has 183 places, 232 transitions, 3635 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:28:21,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 289 transitions, 4507 flow [2024-06-21 17:28:22,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 289 transitions, 4333 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:28:22,108 INFO L231 Difference]: Finished difference. Result has 186 places, 232 transitions, 3719 flow [2024-06-21 17:28:22,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3719, PETRI_PLACES=186, PETRI_TRANSITIONS=232} [2024-06-21 17:28:22,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-21 17:28:22,109 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 232 transitions, 3719 flow [2024-06-21 17:28:22,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:22,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:22,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:22,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:28:22,109 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:22,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1806226034, now seen corresponding path program 8 times [2024-06-21 17:28:22,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:22,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673465237] [2024-06-21 17:28:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:22,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:25,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:25,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673465237] [2024-06-21 17:28:25,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673465237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:25,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:25,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150230967] [2024-06-21 17:28:25,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:25,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:25,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:25,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:25,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:25,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:25,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 232 transitions, 3719 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:25,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:25,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:25,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:27,989 INFO L124 PetriNetUnfolderBase]: 5939/9548 cut-off events. [2024-06-21 17:28:27,990 INFO L125 PetriNetUnfolderBase]: For 336076/336082 co-relation queries the response was YES. [2024-06-21 17:28:28,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58835 conditions, 9548 events. 5939/9548 cut-off events. For 336076/336082 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 64075 event pairs, 2433 based on Foata normal form. 70/9616 useless extension candidates. Maximal degree in co-relation 58744. Up to 7498 conditions per place. [2024-06-21 17:28:28,074 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 184 selfloop transitions, 105 changer transitions 0/293 dead transitions. [2024-06-21 17:28:28,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 293 transitions, 4617 flow [2024-06-21 17:28:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 17:28:28,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:28:28,075 INFO L175 Difference]: Start difference. First operand has 186 places, 232 transitions, 3719 flow. Second operand 10 states and 190 transitions. [2024-06-21 17:28:28,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 293 transitions, 4617 flow [2024-06-21 17:28:28,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 293 transitions, 4365 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 17:28:28,501 INFO L231 Difference]: Finished difference. Result has 188 places, 233 transitions, 3747 flow [2024-06-21 17:28:28,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3747, PETRI_PLACES=188, PETRI_TRANSITIONS=233} [2024-06-21 17:28:28,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-21 17:28:28,502 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 233 transitions, 3747 flow [2024-06-21 17:28:28,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:28,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:28,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:28,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:28:28,503 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:28,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash 969104700, now seen corresponding path program 9 times [2024-06-21 17:28:28,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:28,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861863183] [2024-06-21 17:28:28,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:28,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:31,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:31,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861863183] [2024-06-21 17:28:31,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861863183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:31,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:31,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:31,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248108406] [2024-06-21 17:28:31,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:31,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:31,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 233 transitions, 3747 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:31,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:31,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:31,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:33,556 INFO L124 PetriNetUnfolderBase]: 6111/9849 cut-off events. [2024-06-21 17:28:33,556 INFO L125 PetriNetUnfolderBase]: For 337840/337887 co-relation queries the response was YES. [2024-06-21 17:28:33,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59463 conditions, 9849 events. 6111/9849 cut-off events. For 337840/337887 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 66879 event pairs, 2215 based on Foata normal form. 99/9944 useless extension candidates. Maximal degree in co-relation 59371. Up to 7981 conditions per place. [2024-06-21 17:28:33,655 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 130 changer transitions 5/301 dead transitions. [2024-06-21 17:28:33,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 301 transitions, 4889 flow [2024-06-21 17:28:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 17:28:33,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48048780487804876 [2024-06-21 17:28:33,657 INFO L175 Difference]: Start difference. First operand has 188 places, 233 transitions, 3747 flow. Second operand 10 states and 197 transitions. [2024-06-21 17:28:33,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 301 transitions, 4889 flow [2024-06-21 17:28:34,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 301 transitions, 4649 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 17:28:34,157 INFO L231 Difference]: Finished difference. Result has 190 places, 233 transitions, 3823 flow [2024-06-21 17:28:34,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3507, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3823, PETRI_PLACES=190, PETRI_TRANSITIONS=233} [2024-06-21 17:28:34,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-21 17:28:34,158 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 233 transitions, 3823 flow [2024-06-21 17:28:34,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:34,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:34,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:34,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:28:34,158 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:34,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:34,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1806373904, now seen corresponding path program 10 times [2024-06-21 17:28:34,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:34,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282198724] [2024-06-21 17:28:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:34,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:36,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:36,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282198724] [2024-06-21 17:28:36,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282198724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:36,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:36,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:28:36,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791725903] [2024-06-21 17:28:36,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:36,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:28:36,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:36,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:28:36,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:28:36,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:36,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 233 transitions, 3823 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:36,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:36,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:36,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:39,454 INFO L124 PetriNetUnfolderBase]: 6454/10437 cut-off events. [2024-06-21 17:28:39,454 INFO L125 PetriNetUnfolderBase]: For 341573/341579 co-relation queries the response was YES. [2024-06-21 17:28:39,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61658 conditions, 10437 events. 6454/10437 cut-off events. For 341573/341579 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 71784 event pairs, 2260 based on Foata normal form. 62/10497 useless extension candidates. Maximal degree in co-relation 61565. Up to 5775 conditions per place. [2024-06-21 17:28:39,554 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 192 selfloop transitions, 107 changer transitions 0/303 dead transitions. [2024-06-21 17:28:39,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 303 transitions, 4897 flow [2024-06-21 17:28:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 17:28:39,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-21 17:28:39,556 INFO L175 Difference]: Start difference. First operand has 190 places, 233 transitions, 3823 flow. Second operand 10 states and 196 transitions. [2024-06-21 17:28:39,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 303 transitions, 4897 flow [2024-06-21 17:28:40,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 303 transitions, 4596 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 17:28:40,043 INFO L231 Difference]: Finished difference. Result has 193 places, 236 transitions, 3880 flow [2024-06-21 17:28:40,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3522, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3880, PETRI_PLACES=193, PETRI_TRANSITIONS=236} [2024-06-21 17:28:40,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-21 17:28:40,056 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 236 transitions, 3880 flow [2024-06-21 17:28:40,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:28:40,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:40,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:40,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:28:40,057 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:40,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:40,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1225820412, now seen corresponding path program 2 times [2024-06-21 17:28:40,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:40,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587702374] [2024-06-21 17:28:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:40,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:42,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:42,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587702374] [2024-06-21 17:28:42,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587702374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:42,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:42,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:42,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174307389] [2024-06-21 17:28:42,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:42,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:42,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:42,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:42,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 236 transitions, 3880 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 17:28:42,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:42,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:42,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:45,643 INFO L124 PetriNetUnfolderBase]: 6610/10738 cut-off events. [2024-06-21 17:28:45,644 INFO L125 PetriNetUnfolderBase]: For 359367/359414 co-relation queries the response was YES. [2024-06-21 17:28:45,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62902 conditions, 10738 events. 6610/10738 cut-off events. For 359367/359414 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 74852 event pairs, 2448 based on Foata normal form. 83/10817 useless extension candidates. Maximal degree in co-relation 62807. Up to 8500 conditions per place. [2024-06-21 17:28:45,752 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 170 selfloop transitions, 132 changer transitions 11/317 dead transitions. [2024-06-21 17:28:45,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 317 transitions, 5136 flow [2024-06-21 17:28:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:28:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:28:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 17:28:45,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48337028824833705 [2024-06-21 17:28:45,753 INFO L175 Difference]: Start difference. First operand has 193 places, 236 transitions, 3880 flow. Second operand 11 states and 218 transitions. [2024-06-21 17:28:45,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 317 transitions, 5136 flow [2024-06-21 17:28:46,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 317 transitions, 4862 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 17:28:46,660 INFO L231 Difference]: Finished difference. Result has 196 places, 236 transitions, 3925 flow [2024-06-21 17:28:46,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3925, PETRI_PLACES=196, PETRI_TRANSITIONS=236} [2024-06-21 17:28:46,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-21 17:28:46,661 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 236 transitions, 3925 flow [2024-06-21 17:28:46,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 17:28:46,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:46,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:46,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:28:46,662 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:46,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:46,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1279616986, now seen corresponding path program 3 times [2024-06-21 17:28:46,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:46,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522225123] [2024-06-21 17:28:46,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:46,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:49,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:49,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522225123] [2024-06-21 17:28:49,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522225123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:49,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:49,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:49,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438621493] [2024-06-21 17:28:49,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:49,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:49,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:49,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:49,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:49,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 236 transitions, 3925 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 17:28:49,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:49,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:49,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:52,280 INFO L124 PetriNetUnfolderBase]: 6706/10923 cut-off events. [2024-06-21 17:28:52,280 INFO L125 PetriNetUnfolderBase]: For 373166/373172 co-relation queries the response was YES. [2024-06-21 17:28:52,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63867 conditions, 10923 events. 6706/10923 cut-off events. For 373166/373172 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 76690 event pairs, 2763 based on Foata normal form. 54/10975 useless extension candidates. Maximal degree in co-relation 63771. Up to 7795 conditions per place. [2024-06-21 17:28:52,393 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 105 changer transitions 8/299 dead transitions. [2024-06-21 17:28:52,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 299 transitions, 4875 flow [2024-06-21 17:28:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:28:52,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-21 17:28:52,395 INFO L175 Difference]: Start difference. First operand has 196 places, 236 transitions, 3925 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:28:52,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 299 transitions, 4875 flow [2024-06-21 17:28:53,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 299 transitions, 4565 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 17:28:53,069 INFO L231 Difference]: Finished difference. Result has 197 places, 234 transitions, 3838 flow [2024-06-21 17:28:53,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3838, PETRI_PLACES=197, PETRI_TRANSITIONS=234} [2024-06-21 17:28:53,070 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 17:28:53,070 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 234 transitions, 3838 flow [2024-06-21 17:28:53,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 17:28:53,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:28:53,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:28:53,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:28:53,071 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:28:53,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:28:53,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1235017182, now seen corresponding path program 4 times [2024-06-21 17:28:53,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:28:53,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081094402] [2024-06-21 17:28:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:28:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:28:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:28:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:28:56,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:28:56,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081094402] [2024-06-21 17:28:56,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081094402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:28:56,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:28:56,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:28:56,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590909893] [2024-06-21 17:28:56,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:28:56,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:28:56,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:28:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:28:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:28:56,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:28:56,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 234 transitions, 3838 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 17:28:56,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:28:56,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:28:56,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:28:59,362 INFO L124 PetriNetUnfolderBase]: 6686/10894 cut-off events. [2024-06-21 17:28:59,362 INFO L125 PetriNetUnfolderBase]: For 408639/408686 co-relation queries the response was YES. [2024-06-21 17:28:59,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64184 conditions, 10894 events. 6686/10894 cut-off events. For 408639/408686 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 76162 event pairs, 2267 based on Foata normal form. 83/10973 useless extension candidates. Maximal degree in co-relation 64087. Up to 5940 conditions per place. [2024-06-21 17:28:59,464 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 138 changer transitions 12/311 dead transitions. [2024-06-21 17:28:59,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 311 transitions, 5056 flow [2024-06-21 17:28:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:28:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:28:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 17:28:59,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-21 17:28:59,466 INFO L175 Difference]: Start difference. First operand has 197 places, 234 transitions, 3838 flow. Second operand 10 states and 204 transitions. [2024-06-21 17:28:59,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 311 transitions, 5056 flow [2024-06-21 17:29:00,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 311 transitions, 4764 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-21 17:29:00,068 INFO L231 Difference]: Finished difference. Result has 197 places, 231 transitions, 3743 flow [2024-06-21 17:29:00,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3743, PETRI_PLACES=197, PETRI_TRANSITIONS=231} [2024-06-21 17:29:00,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 17:29:00,069 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 231 transitions, 3743 flow [2024-06-21 17:29:00,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 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) [2024-06-21 17:29:00,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:00,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:00,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:29:00,070 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:00,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash -531410572, now seen corresponding path program 2 times [2024-06-21 17:29:00,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:00,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760845547] [2024-06-21 17:29:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:00,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:02,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:02,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760845547] [2024-06-21 17:29:02,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760845547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:02,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:02,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:29:02,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413912872] [2024-06-21 17:29:02,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:02,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:29:02,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:29:02,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:29:02,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:29:02,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 231 transitions, 3743 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:02,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:02,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:29:02,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:04,186 INFO L124 PetriNetUnfolderBase]: 6110/9959 cut-off events. [2024-06-21 17:29:04,187 INFO L125 PetriNetUnfolderBase]: For 371492/371537 co-relation queries the response was YES. [2024-06-21 17:29:04,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60641 conditions, 9959 events. 6110/9959 cut-off events. For 371492/371537 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 68938 event pairs, 2591 based on Foata normal form. 35/9960 useless extension candidates. Maximal degree in co-relation 60544. Up to 9271 conditions per place. [2024-06-21 17:29:04,285 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 72 changer transitions 0/252 dead transitions. [2024-06-21 17:29:04,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 252 transitions, 4455 flow [2024-06-21 17:29:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:29:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:29:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:29:04,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-21 17:29:04,287 INFO L175 Difference]: Start difference. First operand has 197 places, 231 transitions, 3743 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:29:04,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 252 transitions, 4455 flow [2024-06-21 17:29:04,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 252 transitions, 4115 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 17:29:04,870 INFO L231 Difference]: Finished difference. Result has 195 places, 234 transitions, 3598 flow [2024-06-21 17:29:04,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3598, PETRI_PLACES=195, PETRI_TRANSITIONS=234} [2024-06-21 17:29:04,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-21 17:29:04,870 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 234 transitions, 3598 flow [2024-06-21 17:29:04,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:04,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:04,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:04,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:29:04,871 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:04,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash -548377554, now seen corresponding path program 1 times [2024-06-21 17:29:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:04,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68317961] [2024-06-21 17:29:04,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:04,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:06,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:06,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68317961] [2024-06-21 17:29:06,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68317961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:06,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:06,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:29:06,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562436273] [2024-06-21 17:29:06,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:06,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:29:06,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:29:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:29:06,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:29:06,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 234 transitions, 3598 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:06,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:06,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:29:06,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:08,976 INFO L124 PetriNetUnfolderBase]: 5911/9618 cut-off events. [2024-06-21 17:29:08,976 INFO L125 PetriNetUnfolderBase]: For 349714/349737 co-relation queries the response was YES. [2024-06-21 17:29:09,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57129 conditions, 9618 events. 5911/9618 cut-off events. For 349714/349737 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 65759 event pairs, 2745 based on Foata normal form. 32/9624 useless extension candidates. Maximal degree in co-relation 57031. Up to 9282 conditions per place. [2024-06-21 17:29:09,067 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 224 selfloop transitions, 15 changer transitions 0/255 dead transitions. [2024-06-21 17:29:09,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 4176 flow [2024-06-21 17:29:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:29:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:29:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 17:29:09,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-21 17:29:09,069 INFO L175 Difference]: Start difference. First operand has 195 places, 234 transitions, 3598 flow. Second operand 6 states and 103 transitions. [2024-06-21 17:29:09,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 4176 flow [2024-06-21 17:29:09,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 255 transitions, 3960 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:29:09,603 INFO L231 Difference]: Finished difference. Result has 195 places, 236 transitions, 3456 flow [2024-06-21 17:29:09,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3456, PETRI_PLACES=195, PETRI_TRANSITIONS=236} [2024-06-21 17:29:09,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-21 17:29:09,604 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 236 transitions, 3456 flow [2024-06-21 17:29:09,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:09,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:09,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:09,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:29:09,605 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:09,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1545302463, now seen corresponding path program 1 times [2024-06-21 17:29:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:09,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439774255] [2024-06-21 17:29:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:09,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:11,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:11,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439774255] [2024-06-21 17:29:11,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439774255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:11,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:11,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:29:11,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395788428] [2024-06-21 17:29:11,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:11,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:29:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:29:11,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:29:11,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:29:11,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 236 transitions, 3456 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:11,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:11,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:29:11,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:14,172 INFO L124 PetriNetUnfolderBase]: 6034/9794 cut-off events. [2024-06-21 17:29:14,172 INFO L125 PetriNetUnfolderBase]: For 334656/334656 co-relation queries the response was YES. [2024-06-21 17:29:14,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57588 conditions, 9794 events. 6034/9794 cut-off events. For 334656/334656 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 67174 event pairs, 2805 based on Foata normal form. 2/9794 useless extension candidates. Maximal degree in co-relation 57492. Up to 9512 conditions per place. [2024-06-21 17:29:14,264 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 31 changer transitions 0/278 dead transitions. [2024-06-21 17:29:14,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 278 transitions, 4350 flow [2024-06-21 17:29:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:29:14,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:29:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 17:29:14,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-21 17:29:14,272 INFO L175 Difference]: Start difference. First operand has 195 places, 236 transitions, 3456 flow. Second operand 9 states and 142 transitions. [2024-06-21 17:29:14,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 278 transitions, 4350 flow [2024-06-21 17:29:14,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 278 transitions, 4298 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 17:29:14,821 INFO L231 Difference]: Finished difference. Result has 201 places, 245 transitions, 3665 flow [2024-06-21 17:29:14,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3665, PETRI_PLACES=201, PETRI_TRANSITIONS=245} [2024-06-21 17:29:14,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 17:29:14,821 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 245 transitions, 3665 flow [2024-06-21 17:29:14,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:14,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:14,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:14,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:29:14,822 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:14,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1545600993, now seen corresponding path program 2 times [2024-06-21 17:29:14,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:14,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105245016] [2024-06-21 17:29:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:14,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:16,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105245016] [2024-06-21 17:29:16,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105245016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:16,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:16,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:29:16,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292447303] [2024-06-21 17:29:16,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:16,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:29:16,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:16,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:29:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:29:16,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:29:16,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 245 transitions, 3665 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:16,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:16,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:29:16,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:18,909 INFO L124 PetriNetUnfolderBase]: 6028/9786 cut-off events. [2024-06-21 17:29:18,910 INFO L125 PetriNetUnfolderBase]: For 348192/348192 co-relation queries the response was YES. [2024-06-21 17:29:18,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57843 conditions, 9786 events. 6028/9786 cut-off events. For 348192/348192 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 67128 event pairs, 2805 based on Foata normal form. 2/9786 useless extension candidates. Maximal degree in co-relation 57745. Up to 9507 conditions per place. [2024-06-21 17:29:19,013 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 236 selfloop transitions, 27 changer transitions 0/267 dead transitions. [2024-06-21 17:29:19,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 267 transitions, 4257 flow [2024-06-21 17:29:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:29:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:29:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:29:19,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 17:29:19,015 INFO L175 Difference]: Start difference. First operand has 201 places, 245 transitions, 3665 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:29:19,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 267 transitions, 4257 flow [2024-06-21 17:29:19,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 267 transitions, 4207 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 17:29:19,443 INFO L231 Difference]: Finished difference. Result has 204 places, 245 transitions, 3676 flow [2024-06-21 17:29:19,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3676, PETRI_PLACES=204, PETRI_TRANSITIONS=245} [2024-06-21 17:29:19,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 17:29:19,443 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 245 transitions, 3676 flow [2024-06-21 17:29:19,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:19,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:19,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:19,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:29:19,444 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:19,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:19,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1899864033, now seen corresponding path program 3 times [2024-06-21 17:29:19,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:19,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541124989] [2024-06-21 17:29:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:19,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:21,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541124989] [2024-06-21 17:29:21,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541124989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:21,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:21,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:29:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150166838] [2024-06-21 17:29:21,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:21,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:29:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:29:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:29:21,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:29:21,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 245 transitions, 3676 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:21,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:21,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:29:21,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:23,964 INFO L124 PetriNetUnfolderBase]: 6022/9788 cut-off events. [2024-06-21 17:29:23,964 INFO L125 PetriNetUnfolderBase]: For 361785/361788 co-relation queries the response was YES. [2024-06-21 17:29:24,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58141 conditions, 9788 events. 6022/9788 cut-off events. For 361785/361788 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 67204 event pairs, 2729 based on Foata normal form. 2/9786 useless extension candidates. Maximal degree in co-relation 58041. Up to 9477 conditions per place. [2024-06-21 17:29:24,043 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 32 changer transitions 0/269 dead transitions. [2024-06-21 17:29:24,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 269 transitions, 4339 flow [2024-06-21 17:29:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:29:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:29:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 17:29:24,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-21 17:29:24,044 INFO L175 Difference]: Start difference. First operand has 204 places, 245 transitions, 3676 flow. Second operand 7 states and 107 transitions. [2024-06-21 17:29:24,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 269 transitions, 4339 flow [2024-06-21 17:29:24,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 269 transitions, 4285 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:29:24,579 INFO L231 Difference]: Finished difference. Result has 207 places, 253 transitions, 3815 flow [2024-06-21 17:29:24,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3815, PETRI_PLACES=207, PETRI_TRANSITIONS=253} [2024-06-21 17:29:24,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 17:29:24,579 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 253 transitions, 3815 flow [2024-06-21 17:29:24,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:24,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:24,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:29:24,580 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:24,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1681384077, now seen corresponding path program 1 times [2024-06-21 17:29:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:24,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626330614] [2024-06-21 17:29:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:24,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:27,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:27,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626330614] [2024-06-21 17:29:27,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626330614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:27,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:29:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156394354] [2024-06-21 17:29:27,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:29:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:29:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:29:27,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:29:27,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 253 transitions, 3815 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-21 17:29:27,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:27,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:29:27,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:29,573 INFO L124 PetriNetUnfolderBase]: 5979/9712 cut-off events. [2024-06-21 17:29:29,574 INFO L125 PetriNetUnfolderBase]: For 391637/391656 co-relation queries the response was YES. [2024-06-21 17:29:29,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58308 conditions, 9712 events. 5979/9712 cut-off events. For 391637/391656 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 66677 event pairs, 2718 based on Foata normal form. 28/9716 useless extension candidates. Maximal degree in co-relation 58205. Up to 9101 conditions per place. [2024-06-21 17:29:29,673 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 70 changer transitions 0/287 dead transitions. [2024-06-21 17:29:29,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 287 transitions, 4497 flow [2024-06-21 17:29:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:29:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:29:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:29:29,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 17:29:29,674 INFO L175 Difference]: Start difference. First operand has 207 places, 253 transitions, 3815 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:29:29,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 287 transitions, 4497 flow [2024-06-21 17:29:30,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 287 transitions, 4433 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 17:29:30,079 INFO L231 Difference]: Finished difference. Result has 212 places, 255 transitions, 3953 flow [2024-06-21 17:29:30,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3953, PETRI_PLACES=212, PETRI_TRANSITIONS=255} [2024-06-21 17:29:30,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-21 17:29:30,080 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 255 transitions, 3953 flow [2024-06-21 17:29:30,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-21 17:29:30,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:30,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:30,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:29:30,080 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:30,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1233368489, now seen corresponding path program 2 times [2024-06-21 17:29:30,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:30,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803818969] [2024-06-21 17:29:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:30,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:32,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:32,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803818969] [2024-06-21 17:29:32,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803818969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:32,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:32,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:29:32,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271500971] [2024-06-21 17:29:32,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:32,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:29:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:29:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:29:32,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:29:32,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 255 transitions, 3953 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-21 17:29:32,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:32,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:29:32,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:35,149 INFO L124 PetriNetUnfolderBase]: 6037/9838 cut-off events. [2024-06-21 17:29:35,149 INFO L125 PetriNetUnfolderBase]: For 410790/410835 co-relation queries the response was YES. [2024-06-21 17:29:35,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59578 conditions, 9838 events. 6037/9838 cut-off events. For 410790/410835 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 67821 event pairs, 2492 based on Foata normal form. 43/9848 useless extension candidates. Maximal degree in co-relation 59474. Up to 9073 conditions per place. [2024-06-21 17:29:35,249 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 82 changer transitions 0/282 dead transitions. [2024-06-21 17:29:35,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 282 transitions, 4773 flow [2024-06-21 17:29:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:29:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:29:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 17:29:35,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 17:29:35,250 INFO L175 Difference]: Start difference. First operand has 212 places, 255 transitions, 3953 flow. Second operand 7 states and 124 transitions. [2024-06-21 17:29:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 282 transitions, 4773 flow [2024-06-21 17:29:35,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 4617 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:29:35,888 INFO L231 Difference]: Finished difference. Result has 213 places, 257 transitions, 4016 flow [2024-06-21 17:29:35,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3797, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4016, PETRI_PLACES=213, PETRI_TRANSITIONS=257} [2024-06-21 17:29:35,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-21 17:29:35,889 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 257 transitions, 4016 flow [2024-06-21 17:29:35,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-21 17:29:35,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:35,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:29:35,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:29:35,889 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:35,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:35,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1290207085, now seen corresponding path program 3 times [2024-06-21 17:29:35,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:35,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752313635] [2024-06-21 17:29:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:35,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:38,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752313635] [2024-06-21 17:29:38,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752313635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:38,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:38,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:29:38,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792123859] [2024-06-21 17:29:38,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:38,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:29:38,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:38,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:29:38,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:29:38,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 17:29:38,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 257 transitions, 4016 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-21 17:29:38,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:38,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 17:29:38,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:40,878 INFO L124 PetriNetUnfolderBase]: 6144/10001 cut-off events. [2024-06-21 17:29:40,878 INFO L125 PetriNetUnfolderBase]: For 437828/437871 co-relation queries the response was YES. [2024-06-21 17:29:40,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61182 conditions, 10001 events. 6144/10001 cut-off events. For 437828/437871 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 69019 event pairs, 2452 based on Foata normal form. 43/10011 useless extension candidates. Maximal degree in co-relation 61077. Up to 8896 conditions per place. [2024-06-21 17:29:40,997 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 87 changer transitions 0/290 dead transitions. [2024-06-21 17:29:40,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 290 transitions, 4994 flow [2024-06-21 17:29:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:29:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:29:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:29:40,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 17:29:40,999 INFO L175 Difference]: Start difference. First operand has 213 places, 257 transitions, 4016 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:29:40,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 290 transitions, 4994 flow [2024-06-21 17:29:41,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 290 transitions, 4799 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:29:41,684 INFO L231 Difference]: Finished difference. Result has 215 places, 260 transitions, 4068 flow [2024-06-21 17:29:41,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4068, PETRI_PLACES=215, PETRI_TRANSITIONS=260} [2024-06-21 17:29:41,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-21 17:29:41,685 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 260 transitions, 4068 flow [2024-06-21 17:29:41,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 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) [2024-06-21 17:29:41,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:41,685 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] [2024-06-21 17:29:41,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:29:41,685 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:41,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:41,686 INFO L85 PathProgramCache]: Analyzing trace with hash -879124100, now seen corresponding path program 1 times [2024-06-21 17:29:41,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:41,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518725756] [2024-06-21 17:29:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:41,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:44,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:44,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518725756] [2024-06-21 17:29:44,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518725756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:44,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:44,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:29:44,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115953320] [2024-06-21 17:29:44,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:44,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:29:44,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:29:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:29:44,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:29:44,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 260 transitions, 4068 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:44,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:44,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:29:44,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:46,589 INFO L124 PetriNetUnfolderBase]: 6276/10176 cut-off events. [2024-06-21 17:29:46,589 INFO L125 PetriNetUnfolderBase]: For 446681/446681 co-relation queries the response was YES. [2024-06-21 17:29:46,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62568 conditions, 10176 events. 6276/10176 cut-off events. For 446681/446681 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 69872 event pairs, 2733 based on Foata normal form. 8/10182 useless extension candidates. Maximal degree in co-relation 62462. Up to 9748 conditions per place. [2024-06-21 17:29:46,684 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 35 changer transitions 0/307 dead transitions. [2024-06-21 17:29:46,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 307 transitions, 4931 flow [2024-06-21 17:29:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:29:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:29:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 17:29:46,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-21 17:29:46,685 INFO L175 Difference]: Start difference. First operand has 215 places, 260 transitions, 4068 flow. Second operand 10 states and 162 transitions. [2024-06-21 17:29:46,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 307 transitions, 4931 flow [2024-06-21 17:29:47,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 307 transitions, 4794 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 17:29:47,263 INFO L231 Difference]: Finished difference. Result has 222 places, 261 transitions, 4014 flow [2024-06-21 17:29:47,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3931, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4014, PETRI_PLACES=222, PETRI_TRANSITIONS=261} [2024-06-21 17:29:47,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-21 17:29:47,264 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 261 transitions, 4014 flow [2024-06-21 17:29:47,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:47,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:47,264 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] [2024-06-21 17:29:47,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:29:47,265 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:47,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1022955426, now seen corresponding path program 2 times [2024-06-21 17:29:47,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:47,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4760161] [2024-06-21 17:29:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:47,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:50,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:50,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4760161] [2024-06-21 17:29:50,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4760161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:50,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:50,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:29:50,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604105556] [2024-06-21 17:29:50,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:50,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:29:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:29:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:29:50,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:29:50,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 261 transitions, 4014 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:50,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:50,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:29:50,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:52,602 INFO L124 PetriNetUnfolderBase]: 6312/10232 cut-off events. [2024-06-21 17:29:52,602 INFO L125 PetriNetUnfolderBase]: For 463338/463338 co-relation queries the response was YES. [2024-06-21 17:29:52,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63062 conditions, 10232 events. 6312/10232 cut-off events. For 463338/463338 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 70447 event pairs, 2888 based on Foata normal form. 10/10240 useless extension candidates. Maximal degree in co-relation 62954. Up to 9903 conditions per place. [2024-06-21 17:29:52,711 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 32 changer transitions 0/300 dead transitions. [2024-06-21 17:29:52,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 300 transitions, 4743 flow [2024-06-21 17:29:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:29:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:29:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-21 17:29:52,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-21 17:29:52,712 INFO L175 Difference]: Start difference. First operand has 222 places, 261 transitions, 4014 flow. Second operand 10 states and 155 transitions. [2024-06-21 17:29:52,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 300 transitions, 4743 flow [2024-06-21 17:29:53,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 300 transitions, 4680 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:29:53,573 INFO L231 Difference]: Finished difference. Result has 225 places, 262 transitions, 4033 flow [2024-06-21 17:29:53,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3952, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4033, PETRI_PLACES=225, PETRI_TRANSITIONS=262} [2024-06-21 17:29:53,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 17:29:53,573 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 262 transitions, 4033 flow [2024-06-21 17:29:53,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:53,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:53,574 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] [2024-06-21 17:29:53,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:29:53,574 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:53,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash -736068096, now seen corresponding path program 3 times [2024-06-21 17:29:53,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:53,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445085421] [2024-06-21 17:29:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:53,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:29:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:29:55,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:29:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445085421] [2024-06-21 17:29:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445085421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:29:55,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:29:55,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:29:55,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411555185] [2024-06-21 17:29:55,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:29:55,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:29:55,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:29:55,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:29:55,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:29:55,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:29:55,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 262 transitions, 4033 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:55,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:29:55,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:29:55,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:29:58,195 INFO L124 PetriNetUnfolderBase]: 6289/10199 cut-off events. [2024-06-21 17:29:58,196 INFO L125 PetriNetUnfolderBase]: For 470187/470187 co-relation queries the response was YES. [2024-06-21 17:29:58,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62835 conditions, 10199 events. 6289/10199 cut-off events. For 470187/470187 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 70097 event pairs, 2879 based on Foata normal form. 10/10207 useless extension candidates. Maximal degree in co-relation 62726. Up to 9870 conditions per place. [2024-06-21 17:29:58,297 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 258 selfloop transitions, 28 changer transitions 0/290 dead transitions. [2024-06-21 17:29:58,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 290 transitions, 4703 flow [2024-06-21 17:29:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:29:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:29:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 17:29:58,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 17:29:58,299 INFO L175 Difference]: Start difference. First operand has 225 places, 262 transitions, 4033 flow. Second operand 8 states and 126 transitions. [2024-06-21 17:29:58,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 290 transitions, 4703 flow [2024-06-21 17:29:59,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 290 transitions, 4640 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 17:29:59,045 INFO L231 Difference]: Finished difference. Result has 225 places, 262 transitions, 4031 flow [2024-06-21 17:29:59,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4031, PETRI_PLACES=225, PETRI_TRANSITIONS=262} [2024-06-21 17:29:59,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-21 17:29:59,045 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 262 transitions, 4031 flow [2024-06-21 17:29:59,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:29:59,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:29:59,046 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] [2024-06-21 17:29:59,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:29:59,046 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:29:59,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:29:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1028666370, now seen corresponding path program 1 times [2024-06-21 17:29:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:29:59,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668106633] [2024-06-21 17:29:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:29:59,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:29:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:01,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:01,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668106633] [2024-06-21 17:30:01,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668106633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:01,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:01,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819264525] [2024-06-21 17:30:01,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:01,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:01,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:01,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:01,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:01,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 262 transitions, 4031 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:01,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:01,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:01,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:04,094 INFO L124 PetriNetUnfolderBase]: 6287/10204 cut-off events. [2024-06-21 17:30:04,094 INFO L125 PetriNetUnfolderBase]: For 479418/479424 co-relation queries the response was YES. [2024-06-21 17:30:04,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63009 conditions, 10204 events. 6287/10204 cut-off events. For 479418/479424 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 70308 event pairs, 2700 based on Foata normal form. 12/10214 useless extension candidates. Maximal degree in co-relation 62899. Up to 9034 conditions per place. [2024-06-21 17:30:04,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 127 changer transitions 1/321 dead transitions. [2024-06-21 17:30:04,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 321 transitions, 5051 flow [2024-06-21 17:30:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:30:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:30:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-21 17:30:04,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43680709534368073 [2024-06-21 17:30:04,289 INFO L175 Difference]: Start difference. First operand has 225 places, 262 transitions, 4031 flow. Second operand 11 states and 197 transitions. [2024-06-21 17:30:04,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 321 transitions, 5051 flow [2024-06-21 17:30:05,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 321 transitions, 4985 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:30:05,196 INFO L231 Difference]: Finished difference. Result has 229 places, 264 transitions, 4250 flow [2024-06-21 17:30:05,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4250, PETRI_PLACES=229, PETRI_TRANSITIONS=264} [2024-06-21 17:30:05,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-21 17:30:05,197 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 264 transitions, 4250 flow [2024-06-21 17:30:05,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:05,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:05,197 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] [2024-06-21 17:30:05,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:30:05,198 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:05,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:05,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1661231388, now seen corresponding path program 2 times [2024-06-21 17:30:05,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:05,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507767792] [2024-06-21 17:30:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:05,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:07,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:07,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507767792] [2024-06-21 17:30:07,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507767792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:07,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:07,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:07,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821178534] [2024-06-21 17:30:07,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:07,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:07,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 264 transitions, 4250 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:07,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:07,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:07,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:10,359 INFO L124 PetriNetUnfolderBase]: 6419/10424 cut-off events. [2024-06-21 17:30:10,360 INFO L125 PetriNetUnfolderBase]: For 515299/515305 co-relation queries the response was YES. [2024-06-21 17:30:10,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66161 conditions, 10424 events. 6419/10424 cut-off events. For 515299/515305 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 71990 event pairs, 2668 based on Foata normal form. 8/10430 useless extension candidates. Maximal degree in co-relation 66050. Up to 9128 conditions per place. [2024-06-21 17:30:10,465 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 142 changer transitions 1/324 dead transitions. [2024-06-21 17:30:10,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 324 transitions, 5496 flow [2024-06-21 17:30:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:30:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:30:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 17:30:10,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-21 17:30:10,466 INFO L175 Difference]: Start difference. First operand has 229 places, 264 transitions, 4250 flow. Second operand 10 states and 176 transitions. [2024-06-21 17:30:10,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 324 transitions, 5496 flow [2024-06-21 17:30:11,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 324 transitions, 5228 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 17:30:11,174 INFO L231 Difference]: Finished difference. Result has 232 places, 277 transitions, 4572 flow [2024-06-21 17:30:11,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4572, PETRI_PLACES=232, PETRI_TRANSITIONS=277} [2024-06-21 17:30:11,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-21 17:30:11,174 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 277 transitions, 4572 flow [2024-06-21 17:30:11,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:11,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:11,175 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] [2024-06-21 17:30:11,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:30:11,179 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:11,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:11,179 INFO L85 PathProgramCache]: Analyzing trace with hash -913375200, now seen corresponding path program 3 times [2024-06-21 17:30:11,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922594446] [2024-06-21 17:30:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:11,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:13,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:13,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922594446] [2024-06-21 17:30:13,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922594446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:13,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:13,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:13,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560715983] [2024-06-21 17:30:13,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:13,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:13,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:13,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:13,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 277 transitions, 4572 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:13,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:13,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:13,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:16,618 INFO L124 PetriNetUnfolderBase]: 6397/10380 cut-off events. [2024-06-21 17:30:16,619 INFO L125 PetriNetUnfolderBase]: For 531957/531959 co-relation queries the response was YES. [2024-06-21 17:30:16,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66171 conditions, 10380 events. 6397/10380 cut-off events. For 531957/531959 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 71547 event pairs, 2770 based on Foata normal form. 8/10386 useless extension candidates. Maximal degree in co-relation 66058. Up to 9451 conditions per place. [2024-06-21 17:30:16,736 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 213 selfloop transitions, 106 changer transitions 1/324 dead transitions. [2024-06-21 17:30:16,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 324 transitions, 5450 flow [2024-06-21 17:30:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:30:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:30:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 17:30:16,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-21 17:30:16,738 INFO L175 Difference]: Start difference. First operand has 232 places, 277 transitions, 4572 flow. Second operand 10 states and 174 transitions. [2024-06-21 17:30:16,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 324 transitions, 5450 flow [2024-06-21 17:30:17,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 324 transitions, 5252 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:30:17,716 INFO L231 Difference]: Finished difference. Result has 236 places, 276 transitions, 4576 flow [2024-06-21 17:30:17,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4576, PETRI_PLACES=236, PETRI_TRANSITIONS=276} [2024-06-21 17:30:17,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 17:30:17,717 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 276 transitions, 4576 flow [2024-06-21 17:30:17,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:17,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:17,717 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] [2024-06-21 17:30:17,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:30:17,717 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:17,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash -913076670, now seen corresponding path program 4 times [2024-06-21 17:30:17,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:17,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881218329] [2024-06-21 17:30:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:17,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:20,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:20,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881218329] [2024-06-21 17:30:20,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881218329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:20,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:20,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:20,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054625653] [2024-06-21 17:30:20,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:20,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:20,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:20,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:20,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:20,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 276 transitions, 4576 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:20,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:20,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:20,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:22,807 INFO L124 PetriNetUnfolderBase]: 6315/10244 cut-off events. [2024-06-21 17:30:22,807 INFO L125 PetriNetUnfolderBase]: For 542321/542323 co-relation queries the response was YES. [2024-06-21 17:30:22,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65446 conditions, 10244 events. 6315/10244 cut-off events. For 542321/542323 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 70485 event pairs, 2725 based on Foata normal form. 8/10250 useless extension candidates. Maximal degree in co-relation 65332. Up to 9340 conditions per place. [2024-06-21 17:30:22,919 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 106 changer transitions 2/329 dead transitions. [2024-06-21 17:30:22,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 329 transitions, 5478 flow [2024-06-21 17:30:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:30:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:30:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-21 17:30:22,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 17:30:22,921 INFO L175 Difference]: Start difference. First operand has 236 places, 276 transitions, 4576 flow. Second operand 12 states and 200 transitions. [2024-06-21 17:30:22,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 329 transitions, 5478 flow [2024-06-21 17:30:23,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 329 transitions, 5315 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:30:23,876 INFO L231 Difference]: Finished difference. Result has 241 places, 274 transitions, 4589 flow [2024-06-21 17:30:23,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4589, PETRI_PLACES=241, PETRI_TRANSITIONS=274} [2024-06-21 17:30:23,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 17:30:23,876 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 274 transitions, 4589 flow [2024-06-21 17:30:23,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:23,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:23,877 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] [2024-06-21 17:30:23,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:30:23,877 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:23,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1948118718, now seen corresponding path program 5 times [2024-06-21 17:30:23,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:23,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650661567] [2024-06-21 17:30:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:23,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:26,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:26,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650661567] [2024-06-21 17:30:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650661567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:26,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:26,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:26,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279556539] [2024-06-21 17:30:26,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:26,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:26,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 274 transitions, 4589 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:28,784 INFO L124 PetriNetUnfolderBase]: 6069/9858 cut-off events. [2024-06-21 17:30:28,784 INFO L125 PetriNetUnfolderBase]: For 552802/552804 co-relation queries the response was YES. [2024-06-21 17:30:28,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64111 conditions, 9858 events. 6069/9858 cut-off events. For 552802/552804 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 67356 event pairs, 2541 based on Foata normal form. 4/9860 useless extension candidates. Maximal degree in co-relation 63996. Up to 8647 conditions per place. [2024-06-21 17:30:28,867 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 174 selfloop transitions, 128 changer transitions 2/308 dead transitions. [2024-06-21 17:30:28,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 308 transitions, 5497 flow [2024-06-21 17:30:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:30:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:30:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 17:30:28,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:30:28,875 INFO L175 Difference]: Start difference. First operand has 241 places, 274 transitions, 4589 flow. Second operand 9 states and 153 transitions. [2024-06-21 17:30:28,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 308 transitions, 5497 flow [2024-06-21 17:30:29,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 308 transitions, 5254 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 17:30:29,673 INFO L231 Difference]: Finished difference. Result has 241 places, 272 transitions, 4585 flow [2024-06-21 17:30:29,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4585, PETRI_PLACES=241, PETRI_TRANSITIONS=272} [2024-06-21 17:30:29,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 17:30:29,674 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 272 transitions, 4585 flow [2024-06-21 17:30:29,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:29,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:29,674 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] [2024-06-21 17:30:29,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:30:29,674 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:29,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:29,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1948238688, now seen corresponding path program 6 times [2024-06-21 17:30:29,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:29,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406862705] [2024-06-21 17:30:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:29,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:32,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:32,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406862705] [2024-06-21 17:30:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406862705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:32,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:32,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:32,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136746826] [2024-06-21 17:30:32,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:32,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:32,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:32,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:32,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 272 transitions, 4585 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:32,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:32,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:32,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:34,720 INFO L124 PetriNetUnfolderBase]: 5843/9444 cut-off events. [2024-06-21 17:30:34,720 INFO L125 PetriNetUnfolderBase]: For 569465/569471 co-relation queries the response was YES. [2024-06-21 17:30:34,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63028 conditions, 9444 events. 5843/9444 cut-off events. For 569465/569471 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 63567 event pairs, 2517 based on Foata normal form. 8/9450 useless extension candidates. Maximal degree in co-relation 62912. Up to 8908 conditions per place. [2024-06-21 17:30:34,827 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 74 changer transitions 4/301 dead transitions. [2024-06-21 17:30:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 301 transitions, 5259 flow [2024-06-21 17:30:34,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:30:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:30:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 17:30:34,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-21 17:30:34,829 INFO L175 Difference]: Start difference. First operand has 241 places, 272 transitions, 4585 flow. Second operand 9 states and 141 transitions. [2024-06-21 17:30:34,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 301 transitions, 5259 flow [2024-06-21 17:30:35,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 301 transitions, 4848 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 17:30:35,752 INFO L231 Difference]: Finished difference. Result has 239 places, 268 transitions, 4261 flow [2024-06-21 17:30:35,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4261, PETRI_PLACES=239, PETRI_TRANSITIONS=268} [2024-06-21 17:30:35,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-21 17:30:35,752 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 268 transitions, 4261 flow [2024-06-21 17:30:35,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:35,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:35,753 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] [2024-06-21 17:30:35,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:30:35,753 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:35,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:35,753 INFO L85 PathProgramCache]: Analyzing trace with hash -735699134, now seen corresponding path program 1 times [2024-06-21 17:30:35,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:35,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195265212] [2024-06-21 17:30:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:35,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:38,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:38,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195265212] [2024-06-21 17:30:38,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195265212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:38,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:38,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:30:38,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143706700] [2024-06-21 17:30:38,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:38,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:30:38,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:38,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:30:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:30:38,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:38,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 268 transitions, 4261 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:30:38,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:38,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:38,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:41,099 INFO L124 PetriNetUnfolderBase]: 5691/9237 cut-off events. [2024-06-21 17:30:41,099 INFO L125 PetriNetUnfolderBase]: For 584231/584231 co-relation queries the response was YES. [2024-06-21 17:30:41,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61728 conditions, 9237 events. 5691/9237 cut-off events. For 584231/584231 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 62080 event pairs, 2486 based on Foata normal form. 6/9241 useless extension candidates. Maximal degree in co-relation 61612. Up to 8798 conditions per place. [2024-06-21 17:30:41,193 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 30 changer transitions 0/301 dead transitions. [2024-06-21 17:30:41,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 301 transitions, 5003 flow [2024-06-21 17:30:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:30:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:30:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:30:41,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 17:30:41,194 INFO L175 Difference]: Start difference. First operand has 239 places, 268 transitions, 4261 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:30:41,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 301 transitions, 5003 flow [2024-06-21 17:30:42,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 301 transitions, 4674 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 17:30:42,255 INFO L231 Difference]: Finished difference. Result has 236 places, 271 transitions, 4046 flow [2024-06-21 17:30:42,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3932, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4046, PETRI_PLACES=236, PETRI_TRANSITIONS=271} [2024-06-21 17:30:42,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 17:30:42,255 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 271 transitions, 4046 flow [2024-06-21 17:30:42,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:30:42,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:42,256 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] [2024-06-21 17:30:42,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:30:42,256 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:42,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:42,256 INFO L85 PathProgramCache]: Analyzing trace with hash 408296960, now seen corresponding path program 4 times [2024-06-21 17:30:42,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:42,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107680720] [2024-06-21 17:30:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:42,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:44,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:44,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107680720] [2024-06-21 17:30:44,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107680720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:44,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:44,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:44,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620516051] [2024-06-21 17:30:44,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:44,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:44,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:44,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:44,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 271 transitions, 4046 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:44,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:44,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:44,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:47,228 INFO L124 PetriNetUnfolderBase]: 5701/9257 cut-off events. [2024-06-21 17:30:47,229 INFO L125 PetriNetUnfolderBase]: For 562171/562174 co-relation queries the response was YES. [2024-06-21 17:30:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60564 conditions, 9257 events. 5701/9257 cut-off events. For 562171/562174 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 62215 event pairs, 2460 based on Foata normal form. 10/9263 useless extension candidates. Maximal degree in co-relation 60448. Up to 8868 conditions per place. [2024-06-21 17:30:47,327 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 257 selfloop transitions, 33 changer transitions 0/294 dead transitions. [2024-06-21 17:30:47,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 294 transitions, 4720 flow [2024-06-21 17:30:47,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:30:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:30:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 17:30:47,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-21 17:30:47,329 INFO L175 Difference]: Start difference. First operand has 236 places, 271 transitions, 4046 flow. Second operand 8 states and 121 transitions. [2024-06-21 17:30:47,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 294 transitions, 4720 flow [2024-06-21 17:30:48,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 294 transitions, 4666 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:30:48,446 INFO L231 Difference]: Finished difference. Result has 240 places, 272 transitions, 4081 flow [2024-06-21 17:30:48,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3992, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4081, PETRI_PLACES=240, PETRI_TRANSITIONS=272} [2024-06-21 17:30:48,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 17:30:48,447 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 272 transitions, 4081 flow [2024-06-21 17:30:48,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:48,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:48,447 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] [2024-06-21 17:30:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:30:48,447 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:48,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2045412762, now seen corresponding path program 1 times [2024-06-21 17:30:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:48,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932576608] [2024-06-21 17:30:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:48,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:50,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:50,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932576608] [2024-06-21 17:30:50,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932576608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:50,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:50,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:50,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578969363] [2024-06-21 17:30:50,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:50,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:50,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:50,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:50,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:50,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 272 transitions, 4081 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:50,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:50,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:50,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:53,722 INFO L124 PetriNetUnfolderBase]: 5689/9245 cut-off events. [2024-06-21 17:30:53,723 INFO L125 PetriNetUnfolderBase]: For 567318/567365 co-relation queries the response was YES. [2024-06-21 17:30:53,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60690 conditions, 9245 events. 5689/9245 cut-off events. For 567318/567365 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 62213 event pairs, 2179 based on Foata normal form. 39/9280 useless extension candidates. Maximal degree in co-relation 60572. Up to 8520 conditions per place. [2024-06-21 17:30:53,813 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 220 selfloop transitions, 75 changer transitions 0/299 dead transitions. [2024-06-21 17:30:53,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 299 transitions, 4853 flow [2024-06-21 17:30:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:30:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:30:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:30:53,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 17:30:53,815 INFO L175 Difference]: Start difference. First operand has 240 places, 272 transitions, 4081 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:30:53,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 299 transitions, 4853 flow [2024-06-21 17:30:54,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 299 transitions, 4768 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 17:30:54,795 INFO L231 Difference]: Finished difference. Result has 241 places, 272 transitions, 4152 flow [2024-06-21 17:30:54,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4152, PETRI_PLACES=241, PETRI_TRANSITIONS=272} [2024-06-21 17:30:54,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 17:30:54,796 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 272 transitions, 4152 flow [2024-06-21 17:30:54,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:54,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:30:54,796 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] [2024-06-21 17:30:54,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:30:54,797 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:30:54,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:30:54,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1528788848, now seen corresponding path program 7 times [2024-06-21 17:30:54,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:30:54,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858501275] [2024-06-21 17:30:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:30:54,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:30:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:30:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:30:57,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:30:57,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858501275] [2024-06-21 17:30:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858501275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:30:57,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:30:57,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:30:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11866673] [2024-06-21 17:30:57,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:30:57,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:30:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:30:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:30:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:30:57,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:30:57,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 272 transitions, 4152 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:30:57,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:30:57,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:30:57,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:30:59,677 INFO L124 PetriNetUnfolderBase]: 5671/9218 cut-off events. [2024-06-21 17:30:59,678 INFO L125 PetriNetUnfolderBase]: For 580640/580646 co-relation queries the response was YES. [2024-06-21 17:30:59,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60727 conditions, 9218 events. 5671/9218 cut-off events. For 580640/580646 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 62139 event pairs, 2359 based on Foata normal form. 12/9228 useless extension candidates. Maximal degree in co-relation 60608. Up to 8182 conditions per place. [2024-06-21 17:30:59,779 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 118 changer transitions 1/315 dead transitions. [2024-06-21 17:30:59,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 315 transitions, 5008 flow [2024-06-21 17:30:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:30:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:30:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:30:59,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 17:30:59,780 INFO L175 Difference]: Start difference. First operand has 241 places, 272 transitions, 4152 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:30:59,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 315 transitions, 5008 flow [2024-06-21 17:31:00,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 315 transitions, 4800 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:31:00,815 INFO L231 Difference]: Finished difference. Result has 244 places, 271 transitions, 4189 flow [2024-06-21 17:31:00,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4189, PETRI_PLACES=244, PETRI_TRANSITIONS=271} [2024-06-21 17:31:00,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-21 17:31:00,816 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 271 transitions, 4189 flow [2024-06-21 17:31:00,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:00,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:00,816 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] [2024-06-21 17:31:00,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:31:00,817 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:00,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:00,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1429490976, now seen corresponding path program 8 times [2024-06-21 17:31:00,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:00,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108704513] [2024-06-21 17:31:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:00,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:03,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:03,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108704513] [2024-06-21 17:31:03,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108704513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:03,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:03,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:03,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362163305] [2024-06-21 17:31:03,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:03,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:03,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:03,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:03,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:03,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:03,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 271 transitions, 4189 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:03,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:03,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:03,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:05,751 INFO L124 PetriNetUnfolderBase]: 5593/9094 cut-off events. [2024-06-21 17:31:05,751 INFO L125 PetriNetUnfolderBase]: For 590765/590771 co-relation queries the response was YES. [2024-06-21 17:31:05,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60365 conditions, 9094 events. 5593/9094 cut-off events. For 590765/590771 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 61103 event pairs, 2326 based on Foata normal form. 12/9104 useless extension candidates. Maximal degree in co-relation 60245. Up to 8071 conditions per place. [2024-06-21 17:31:05,835 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 114 changer transitions 3/309 dead transitions. [2024-06-21 17:31:05,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 309 transitions, 4907 flow [2024-06-21 17:31:05,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:31:05,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 17:31:05,836 INFO L175 Difference]: Start difference. First operand has 244 places, 271 transitions, 4189 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:31:05,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 309 transitions, 4907 flow [2024-06-21 17:31:06,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 309 transitions, 4686 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:31:06,722 INFO L231 Difference]: Finished difference. Result has 244 places, 269 transitions, 4186 flow [2024-06-21 17:31:06,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4186, PETRI_PLACES=244, PETRI_TRANSITIONS=269} [2024-06-21 17:31:06,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-21 17:31:06,723 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 269 transitions, 4186 flow [2024-06-21 17:31:06,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:06,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:06,724 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] [2024-06-21 17:31:06,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:31:06,724 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:06,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1783754202, now seen corresponding path program 2 times [2024-06-21 17:31:06,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:06,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89263819] [2024-06-21 17:31:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:06,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:08,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:08,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89263819] [2024-06-21 17:31:08,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89263819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:08,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:08,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:08,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350992971] [2024-06-21 17:31:08,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:08,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:08,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 269 transitions, 4186 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:08,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:08,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:08,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:11,262 INFO L124 PetriNetUnfolderBase]: 5417/8810 cut-off events. [2024-06-21 17:31:11,262 INFO L125 PetriNetUnfolderBase]: For 563451/563496 co-relation queries the response was YES. [2024-06-21 17:31:11,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58812 conditions, 8810 events. 5417/8810 cut-off events. For 563451/563496 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 58673 event pairs, 2041 based on Foata normal form. 28/8833 useless extension candidates. Maximal degree in co-relation 58693. Up to 8096 conditions per place. [2024-06-21 17:31:11,354 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 80 changer transitions 0/287 dead transitions. [2024-06-21 17:31:11,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 287 transitions, 4796 flow [2024-06-21 17:31:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:31:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:31:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 17:31:11,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-21 17:31:11,356 INFO L175 Difference]: Start difference. First operand has 244 places, 269 transitions, 4186 flow. Second operand 7 states and 114 transitions. [2024-06-21 17:31:11,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 287 transitions, 4796 flow [2024-06-21 17:31:12,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 287 transitions, 4390 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-06-21 17:31:12,362 INFO L231 Difference]: Finished difference. Result has 238 places, 269 transitions, 3946 flow [2024-06-21 17:31:12,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3946, PETRI_PLACES=238, PETRI_TRANSITIONS=269} [2024-06-21 17:31:12,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-21 17:31:12,363 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 269 transitions, 3946 flow [2024-06-21 17:31:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:12,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:12,363 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] [2024-06-21 17:31:12,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:31:12,363 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:12,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:12,364 INFO L85 PathProgramCache]: Analyzing trace with hash 63626372, now seen corresponding path program 9 times [2024-06-21 17:31:12,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:12,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246691012] [2024-06-21 17:31:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:12,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246691012] [2024-06-21 17:31:14,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246691012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:14,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:14,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:14,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666844146] [2024-06-21 17:31:14,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:14,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:14,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:14,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:14,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:14,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 269 transitions, 3946 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:14,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:14,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:14,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:17,216 INFO L124 PetriNetUnfolderBase]: 5431/8838 cut-off events. [2024-06-21 17:31:17,216 INFO L125 PetriNetUnfolderBase]: For 538955/539000 co-relation queries the response was YES. [2024-06-21 17:31:17,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57828 conditions, 8838 events. 5431/8838 cut-off events. For 538955/539000 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 58955 event pairs, 2019 based on Foata normal form. 30/8863 useless extension candidates. Maximal degree in co-relation 57710. Up to 7517 conditions per place. [2024-06-21 17:31:17,315 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 150 changer transitions 0/307 dead transitions. [2024-06-21 17:31:17,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 307 transitions, 4891 flow [2024-06-21 17:31:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:31:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:31:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:31:17,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 17:31:17,317 INFO L175 Difference]: Start difference. First operand has 238 places, 269 transitions, 3946 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:31:17,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 307 transitions, 4891 flow [2024-06-21 17:31:18,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 307 transitions, 4652 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:31:18,344 INFO L231 Difference]: Finished difference. Result has 240 places, 272 transitions, 4053 flow [2024-06-21 17:31:18,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4053, PETRI_PLACES=240, PETRI_TRANSITIONS=272} [2024-06-21 17:31:18,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 17:31:18,344 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 272 transitions, 4053 flow [2024-06-21 17:31:18,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:18,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:18,345 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] [2024-06-21 17:31:18,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:31:18,345 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:18,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash 928043012, now seen corresponding path program 10 times [2024-06-21 17:31:18,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:18,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791330611] [2024-06-21 17:31:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:20,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:20,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791330611] [2024-06-21 17:31:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791330611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:20,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:20,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:20,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938732799] [2024-06-21 17:31:20,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:20,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:20,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:20,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:20,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 272 transitions, 4053 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:20,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:20,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:20,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:23,398 INFO L124 PetriNetUnfolderBase]: 5425/8812 cut-off events. [2024-06-21 17:31:23,399 INFO L125 PetriNetUnfolderBase]: For 550166/550188 co-relation queries the response was YES. [2024-06-21 17:31:23,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58125 conditions, 8812 events. 5425/8812 cut-off events. For 550166/550188 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 58739 event pairs, 2108 based on Foata normal form. 4/8811 useless extension candidates. Maximal degree in co-relation 58007. Up to 7406 conditions per place. [2024-06-21 17:31:23,488 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 138 changer transitions 0/302 dead transitions. [2024-06-21 17:31:23,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 302 transitions, 5021 flow [2024-06-21 17:31:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:31:23,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 17:31:23,489 INFO L175 Difference]: Start difference. First operand has 240 places, 272 transitions, 4053 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:31:23,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 302 transitions, 5021 flow [2024-06-21 17:31:24,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 302 transitions, 4621 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 17:31:24,451 INFO L231 Difference]: Finished difference. Result has 241 places, 278 transitions, 4104 flow [2024-06-21 17:31:24,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4104, PETRI_PLACES=241, PETRI_TRANSITIONS=278} [2024-06-21 17:31:24,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-21 17:31:24,452 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 278 transitions, 4104 flow [2024-06-21 17:31:24,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:24,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:24,452 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] [2024-06-21 17:31:24,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:31:24,452 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:24,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash 808163232, now seen corresponding path program 2 times [2024-06-21 17:31:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:24,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675937383] [2024-06-21 17:31:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:27,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:27,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675937383] [2024-06-21 17:31:27,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675937383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:27,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:27,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:27,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077788001] [2024-06-21 17:31:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:27,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:27,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:27,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:27,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:27,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 278 transitions, 4104 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:31:27,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:27,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:27,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:29,598 INFO L124 PetriNetUnfolderBase]: 5445/8865 cut-off events. [2024-06-21 17:31:29,599 INFO L125 PetriNetUnfolderBase]: For 579840/579843 co-relation queries the response was YES. [2024-06-21 17:31:29,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59847 conditions, 8865 events. 5445/8865 cut-off events. For 579840/579843 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 59250 event pairs, 2298 based on Foata normal form. 6/8867 useless extension candidates. Maximal degree in co-relation 59728. Up to 8434 conditions per place. [2024-06-21 17:31:29,692 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 266 selfloop transitions, 35 changer transitions 0/305 dead transitions. [2024-06-21 17:31:29,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 305 transitions, 4848 flow [2024-06-21 17:31:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 17:31:29,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 17:31:29,693 INFO L175 Difference]: Start difference. First operand has 241 places, 278 transitions, 4104 flow. Second operand 8 states and 123 transitions. [2024-06-21 17:31:29,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 305 transitions, 4848 flow [2024-06-21 17:31:30,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 305 transitions, 4694 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:30,858 INFO L231 Difference]: Finished difference. Result has 246 places, 281 transitions, 4078 flow [2024-06-21 17:31:30,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3950, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4078, PETRI_PLACES=246, PETRI_TRANSITIONS=281} [2024-06-21 17:31:30,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-21 17:31:30,858 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 281 transitions, 4078 flow [2024-06-21 17:31:30,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:31:30,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:30,859 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] [2024-06-21 17:31:30,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:31:30,859 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:30,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1341715878, now seen corresponding path program 3 times [2024-06-21 17:31:30,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:30,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535171326] [2024-06-21 17:31:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:30,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535171326] [2024-06-21 17:31:33,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535171326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:33,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:33,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372655954] [2024-06-21 17:31:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:33,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:33,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:33,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:33,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 281 transitions, 4078 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:31:33,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:33,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:33,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:36,003 INFO L124 PetriNetUnfolderBase]: 5432/8838 cut-off events. [2024-06-21 17:31:36,003 INFO L125 PetriNetUnfolderBase]: For 589010/589013 co-relation queries the response was YES. [2024-06-21 17:31:36,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59751 conditions, 8838 events. 5432/8838 cut-off events. For 589010/589013 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 58971 event pairs, 2274 based on Foata normal form. 6/8840 useless extension candidates. Maximal degree in co-relation 59628. Up to 8261 conditions per place. [2024-06-21 17:31:36,105 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 263 selfloop transitions, 42 changer transitions 0/309 dead transitions. [2024-06-21 17:31:36,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 309 transitions, 4842 flow [2024-06-21 17:31:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:31:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:31:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 17:31:36,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-21 17:31:36,107 INFO L175 Difference]: Start difference. First operand has 246 places, 281 transitions, 4078 flow. Second operand 8 states and 122 transitions. [2024-06-21 17:31:36,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 309 transitions, 4842 flow [2024-06-21 17:31:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 309 transitions, 4744 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:37,058 INFO L231 Difference]: Finished difference. Result has 251 places, 285 transitions, 4150 flow [2024-06-21 17:31:37,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3984, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4150, PETRI_PLACES=251, PETRI_TRANSITIONS=285} [2024-06-21 17:31:37,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-21 17:31:37,059 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 285 transitions, 4150 flow [2024-06-21 17:31:37,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:31:37,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:37,059 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] [2024-06-21 17:31:37,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:31:37,059 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:37,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:37,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1070179506, now seen corresponding path program 1 times [2024-06-21 17:31:37,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:37,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146612482] [2024-06-21 17:31:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:37,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:39,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:39,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146612482] [2024-06-21 17:31:39,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146612482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:39,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:39,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:39,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913877901] [2024-06-21 17:31:39,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:39,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:39,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:39,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:39,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:39,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:39,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 285 transitions, 4150 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:39,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:39,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:39,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:41,419 INFO L124 PetriNetUnfolderBase]: 5434/8836 cut-off events. [2024-06-21 17:31:41,419 INFO L125 PetriNetUnfolderBase]: For 604981/604981 co-relation queries the response was YES. [2024-06-21 17:31:41,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60006 conditions, 8836 events. 5434/8836 cut-off events. For 604981/604981 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 58963 event pairs, 2239 based on Foata normal form. 8/8841 useless extension candidates. Maximal degree in co-relation 59880. Up to 8370 conditions per place. [2024-06-21 17:31:41,517 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 291 selfloop transitions, 18 changer transitions 0/313 dead transitions. [2024-06-21 17:31:41,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 313 transitions, 4998 flow [2024-06-21 17:31:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:31:41,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-21 17:31:41,518 INFO L175 Difference]: Start difference. First operand has 251 places, 285 transitions, 4150 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:31:41,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 313 transitions, 4998 flow [2024-06-21 17:31:42,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 313 transitions, 4894 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 17:31:42,521 INFO L231 Difference]: Finished difference. Result has 253 places, 286 transitions, 4096 flow [2024-06-21 17:31:42,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4096, PETRI_PLACES=253, PETRI_TRANSITIONS=286} [2024-06-21 17:31:42,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 17:31:42,523 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 286 transitions, 4096 flow [2024-06-21 17:31:42,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:42,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:42,524 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] [2024-06-21 17:31:42,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:31:42,524 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:42,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:42,525 INFO L85 PathProgramCache]: Analyzing trace with hash 590464056, now seen corresponding path program 1 times [2024-06-21 17:31:42,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:42,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431028784] [2024-06-21 17:31:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:42,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:44,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:44,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431028784] [2024-06-21 17:31:44,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431028784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:44,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:44,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:31:44,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298930307] [2024-06-21 17:31:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:44,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:31:44,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:44,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:31:44,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:31:44,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:44,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 286 transitions, 4096 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:44,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:44,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:44,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:46,705 INFO L124 PetriNetUnfolderBase]: 5416/8810 cut-off events. [2024-06-21 17:31:46,705 INFO L125 PetriNetUnfolderBase]: For 609662/609662 co-relation queries the response was YES. [2024-06-21 17:31:46,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59581 conditions, 8810 events. 5416/8810 cut-off events. For 609662/609662 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 58769 event pairs, 2229 based on Foata normal form. 8/8815 useless extension candidates. Maximal degree in co-relation 59454. Up to 8362 conditions per place. [2024-06-21 17:31:46,793 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 290 selfloop transitions, 18 changer transitions 0/312 dead transitions. [2024-06-21 17:31:46,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 312 transitions, 4814 flow [2024-06-21 17:31:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:31:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:31:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 17:31:46,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 17:31:46,795 INFO L175 Difference]: Start difference. First operand has 253 places, 286 transitions, 4096 flow. Second operand 6 states and 106 transitions. [2024-06-21 17:31:46,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 312 transitions, 4814 flow [2024-06-21 17:31:47,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 312 transitions, 4775 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:31:47,861 INFO L231 Difference]: Finished difference. Result has 256 places, 286 transitions, 4097 flow [2024-06-21 17:31:47,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4097, PETRI_PLACES=256, PETRI_TRANSITIONS=286} [2024-06-21 17:31:47,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-21 17:31:47,862 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 286 transitions, 4097 flow [2024-06-21 17:31:47,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:31:47,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:47,862 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, 1] [2024-06-21 17:31:47,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:31:47,862 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:47,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:47,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1482987743, now seen corresponding path program 1 times [2024-06-21 17:31:47,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:47,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532062723] [2024-06-21 17:31:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:47,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:50,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:50,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532062723] [2024-06-21 17:31:50,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532062723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:50,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:50,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:50,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354913221] [2024-06-21 17:31:50,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:50,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:50,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:50,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:50,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 286 transitions, 4097 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:31:50,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:50,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:50,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:31:53,678 INFO L124 PetriNetUnfolderBase]: 5436/8862 cut-off events. [2024-06-21 17:31:53,679 INFO L125 PetriNetUnfolderBase]: For 603029/603076 co-relation queries the response was YES. [2024-06-21 17:31:53,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59728 conditions, 8862 events. 5436/8862 cut-off events. For 603029/603076 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 59369 event pairs, 2004 based on Foata normal form. 39/8897 useless extension candidates. Maximal degree in co-relation 59600. Up to 7518 conditions per place. [2024-06-21 17:31:53,785 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 147 changer transitions 0/347 dead transitions. [2024-06-21 17:31:53,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 347 transitions, 5213 flow [2024-06-21 17:31:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:31:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:31:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-21 17:31:53,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 17:31:53,787 INFO L175 Difference]: Start difference. First operand has 256 places, 286 transitions, 4097 flow. Second operand 12 states and 207 transitions. [2024-06-21 17:31:53,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 347 transitions, 5213 flow [2024-06-21 17:31:54,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 347 transitions, 5166 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 17:31:54,815 INFO L231 Difference]: Finished difference. Result has 263 places, 289 transitions, 4386 flow [2024-06-21 17:31:54,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4050, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4386, PETRI_PLACES=263, PETRI_TRANSITIONS=289} [2024-06-21 17:31:54,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 17:31:54,816 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 289 transitions, 4386 flow [2024-06-21 17:31:54,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:31:54,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:31:54,816 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, 1] [2024-06-21 17:31:54,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:31:54,816 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:31:54,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:31:54,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1829284255, now seen corresponding path program 2 times [2024-06-21 17:31:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:31:54,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693288315] [2024-06-21 17:31:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:31:54,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:31:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:31:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:31:57,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:31:57,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693288315] [2024-06-21 17:31:57,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693288315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:31:57,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:31:57,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:31:57,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184675139] [2024-06-21 17:31:57,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:31:57,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:31:57,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:31:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:31:57,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:31:57,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:31:57,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 289 transitions, 4386 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:31:57,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:31:57,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:31:57,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:00,884 INFO L124 PetriNetUnfolderBase]: 5424/8850 cut-off events. [2024-06-21 17:32:00,884 INFO L125 PetriNetUnfolderBase]: For 618018/618065 co-relation queries the response was YES. [2024-06-21 17:32:00,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60465 conditions, 8850 events. 5424/8850 cut-off events. For 618018/618065 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 59278 event pairs, 2004 based on Foata normal form. 39/8885 useless extension candidates. Maximal degree in co-relation 60336. Up to 7510 conditions per place. [2024-06-21 17:32:00,986 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 147 changer transitions 0/346 dead transitions. [2024-06-21 17:32:00,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 346 transitions, 5346 flow [2024-06-21 17:32:00,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:32:00,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:32:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-21 17:32:00,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-21 17:32:00,988 INFO L175 Difference]: Start difference. First operand has 263 places, 289 transitions, 4386 flow. Second operand 12 states and 206 transitions. [2024-06-21 17:32:00,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 346 transitions, 5346 flow [2024-06-21 17:32:02,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 346 transitions, 4971 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-21 17:32:02,358 INFO L231 Difference]: Finished difference. Result has 265 places, 289 transitions, 4311 flow [2024-06-21 17:32:02,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4011, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4311, PETRI_PLACES=265, PETRI_TRANSITIONS=289} [2024-06-21 17:32:02,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-21 17:32:02,359 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 289 transitions, 4311 flow [2024-06-21 17:32:02,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:02,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:02,359 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, 1] [2024-06-21 17:32:02,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:32:02,360 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:02,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1111172091, now seen corresponding path program 3 times [2024-06-21 17:32:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:02,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790657884] [2024-06-21 17:32:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:02,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:05,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:05,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790657884] [2024-06-21 17:32:05,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790657884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:05,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:05,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:05,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906238788] [2024-06-21 17:32:05,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:05,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:05,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:05,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:32:05,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 289 transitions, 4311 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:05,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:05,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:32:05,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:08,321 INFO L124 PetriNetUnfolderBase]: 5444/8879 cut-off events. [2024-06-21 17:32:08,321 INFO L125 PetriNetUnfolderBase]: For 636225/636270 co-relation queries the response was YES. [2024-06-21 17:32:08,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60741 conditions, 8879 events. 5444/8879 cut-off events. For 636225/636270 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 59381 event pairs, 2006 based on Foata normal form. 28/8902 useless extension candidates. Maximal degree in co-relation 60611. Up to 7526 conditions per place. [2024-06-21 17:32:08,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 156 changer transitions 0/333 dead transitions. [2024-06-21 17:32:08,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 333 transitions, 5232 flow [2024-06-21 17:32:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:32:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:32:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 17:32:08,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 17:32:08,412 INFO L175 Difference]: Start difference. First operand has 265 places, 289 transitions, 4311 flow. Second operand 12 states and 192 transitions. [2024-06-21 17:32:08,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 333 transitions, 5232 flow [2024-06-21 17:32:09,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 333 transitions, 4928 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 17:32:09,640 INFO L231 Difference]: Finished difference. Result has 266 places, 292 transitions, 4368 flow [2024-06-21 17:32:09,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4368, PETRI_PLACES=266, PETRI_TRANSITIONS=292} [2024-06-21 17:32:09,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-21 17:32:09,641 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 292 transitions, 4368 flow [2024-06-21 17:32:09,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:09,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:09,641 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, 1] [2024-06-21 17:32:09,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:32:09,642 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:09,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:09,642 INFO L85 PathProgramCache]: Analyzing trace with hash -538198259, now seen corresponding path program 4 times [2024-06-21 17:32:09,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:09,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540318498] [2024-06-21 17:32:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:09,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:12,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:12,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540318498] [2024-06-21 17:32:12,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540318498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:12,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:12,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:12,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115671478] [2024-06-21 17:32:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:12,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:12,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:12,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:12,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:12,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:32:12,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 292 transitions, 4368 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:12,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:12,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:32:12,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:15,284 INFO L124 PetriNetUnfolderBase]: 5432/8863 cut-off events. [2024-06-21 17:32:15,285 INFO L125 PetriNetUnfolderBase]: For 629044/629089 co-relation queries the response was YES. [2024-06-21 17:32:15,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60408 conditions, 8863 events. 5432/8863 cut-off events. For 629044/629089 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 59349 event pairs, 2004 based on Foata normal form. 28/8886 useless extension candidates. Maximal degree in co-relation 60277. Up to 7518 conditions per place. [2024-06-21 17:32:15,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 156 changer transitions 0/332 dead transitions. [2024-06-21 17:32:15,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 332 transitions, 5122 flow [2024-06-21 17:32:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:32:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:32:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-21 17:32:15,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882113821138211 [2024-06-21 17:32:15,402 INFO L175 Difference]: Start difference. First operand has 266 places, 292 transitions, 4368 flow. Second operand 12 states and 191 transitions. [2024-06-21 17:32:15,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 332 transitions, 5122 flow [2024-06-21 17:32:16,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 332 transitions, 4758 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 17:32:16,648 INFO L231 Difference]: Finished difference. Result has 268 places, 292 transitions, 4322 flow [2024-06-21 17:32:16,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4004, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4322, PETRI_PLACES=268, PETRI_TRANSITIONS=292} [2024-06-21 17:32:16,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 17:32:16,649 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 292 transitions, 4322 flow [2024-06-21 17:32:16,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:16,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:16,649 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, 1] [2024-06-21 17:32:16,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:32:16,650 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:16,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:16,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1295435607, now seen corresponding path program 5 times [2024-06-21 17:32:16,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:16,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428692220] [2024-06-21 17:32:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:19,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:19,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428692220] [2024-06-21 17:32:19,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428692220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:19,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:19,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649250880] [2024-06-21 17:32:19,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:19,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:19,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:19,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:19,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:32:19,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 292 transitions, 4322 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:19,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:19,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:32:19,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:22,435 INFO L124 PetriNetUnfolderBase]: 5420/8833 cut-off events. [2024-06-21 17:32:22,436 INFO L125 PetriNetUnfolderBase]: For 639022/639044 co-relation queries the response was YES. [2024-06-21 17:32:22,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60229 conditions, 8833 events. 5420/8833 cut-off events. For 639022/639044 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 59164 event pairs, 2087 based on Foata normal form. 6/8834 useless extension candidates. Maximal degree in co-relation 60097. Up to 7407 conditions per place. [2024-06-21 17:32:22,533 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 145 changer transitions 0/322 dead transitions. [2024-06-21 17:32:22,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 322 transitions, 5028 flow [2024-06-21 17:32:22,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:32:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:32:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-21 17:32:22,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472283813747226 [2024-06-21 17:32:22,535 INFO L175 Difference]: Start difference. First operand has 268 places, 292 transitions, 4322 flow. Second operand 11 states and 169 transitions. [2024-06-21 17:32:22,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 322 transitions, 5028 flow [2024-06-21 17:32:23,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 322 transitions, 4716 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 17:32:23,724 INFO L231 Difference]: Finished difference. Result has 268 places, 292 transitions, 4306 flow [2024-06-21 17:32:23,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4306, PETRI_PLACES=268, PETRI_TRANSITIONS=292} [2024-06-21 17:32:23,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 17:32:23,725 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 292 transitions, 4306 flow [2024-06-21 17:32:23,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:23,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:23,725 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, 1, 1] [2024-06-21 17:32:23,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:32:23,725 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:23,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash -359449441, now seen corresponding path program 1 times [2024-06-21 17:32:23,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:23,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240026373] [2024-06-21 17:32:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:23,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:26,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240026373] [2024-06-21 17:32:26,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240026373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:26,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:26,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:32:26,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176833489] [2024-06-21 17:32:26,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:26,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:32:26,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:32:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:32:26,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:32:26,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 292 transitions, 4306 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:26,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:26,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:32:26,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:30,224 INFO L124 PetriNetUnfolderBase]: 8262/13447 cut-off events. [2024-06-21 17:32:30,224 INFO L125 PetriNetUnfolderBase]: For 1094556/1094576 co-relation queries the response was YES. [2024-06-21 17:32:30,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92120 conditions, 13447 events. 8262/13447 cut-off events. For 1094556/1094576 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 96781 event pairs, 3320 based on Foata normal form. 49/13492 useless extension candidates. Maximal degree in co-relation 91987. Up to 8135 conditions per place. [2024-06-21 17:32:30,358 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 292 selfloop transitions, 171 changer transitions 15/482 dead transitions. [2024-06-21 17:32:30,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 482 transitions, 7736 flow [2024-06-21 17:32:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 17:32:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 17:32:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 244 transitions. [2024-06-21 17:32:30,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 17:32:30,360 INFO L175 Difference]: Start difference. First operand has 268 places, 292 transitions, 4306 flow. Second operand 14 states and 244 transitions. [2024-06-21 17:32:30,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 482 transitions, 7736 flow [2024-06-21 17:32:31,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 482 transitions, 7161 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 17:32:31,873 INFO L231 Difference]: Finished difference. Result has 278 places, 371 transitions, 5821 flow [2024-06-21 17:32:31,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5821, PETRI_PLACES=278, PETRI_TRANSITIONS=371} [2024-06-21 17:32:31,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-21 17:32:31,876 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 371 transitions, 5821 flow [2024-06-21 17:32:31,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:32:31,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:31,877 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, 1, 1] [2024-06-21 17:32:31,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:32:31,877 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:31,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash 835016413, now seen corresponding path program 2 times [2024-06-21 17:32:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:31,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581436510] [2024-06-21 17:32:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:34,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:34,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581436510] [2024-06-21 17:32:34,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581436510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:34,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:34,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:34,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949641326] [2024-06-21 17:32:34,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:34,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:34,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:35,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:32:35,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 371 transitions, 5821 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:35,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:35,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:32:35,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:38,594 INFO L124 PetriNetUnfolderBase]: 8032/13082 cut-off events. [2024-06-21 17:32:38,594 INFO L125 PetriNetUnfolderBase]: For 1060339/1060356 co-relation queries the response was YES. [2024-06-21 17:32:38,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90303 conditions, 13082 events. 8032/13082 cut-off events. For 1060339/1060356 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 93772 event pairs, 2814 based on Foata normal form. 51/13131 useless extension candidates. Maximal degree in co-relation 90164. Up to 7679 conditions per place. [2024-06-21 17:32:38,739 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 207 changer transitions 17/446 dead transitions. [2024-06-21 17:32:38,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 446 transitions, 7297 flow [2024-06-21 17:32:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:32:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:32:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-21 17:32:38,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:32:38,740 INFO L175 Difference]: Start difference. First operand has 278 places, 371 transitions, 5821 flow. Second operand 11 states and 209 transitions. [2024-06-21 17:32:38,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 446 transitions, 7297 flow [2024-06-21 17:32:40,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 446 transitions, 7210 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:32:40,606 INFO L231 Difference]: Finished difference. Result has 284 places, 367 transitions, 6117 flow [2024-06-21 17:32:40,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5740, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6117, PETRI_PLACES=284, PETRI_TRANSITIONS=367} [2024-06-21 17:32:40,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 17:32:40,607 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 367 transitions, 6117 flow [2024-06-21 17:32:40,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:40,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:40,607 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, 1, 1] [2024-06-21 17:32:40,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:32:40,607 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:40,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:40,607 INFO L85 PathProgramCache]: Analyzing trace with hash 454657667, now seen corresponding path program 3 times [2024-06-21 17:32:40,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:40,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124503428] [2024-06-21 17:32:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:40,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:43,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124503428] [2024-06-21 17:32:43,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124503428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:43,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:43,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:43,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828196211] [2024-06-21 17:32:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:43,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:43,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:43,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:43,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:32:43,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 367 transitions, 6117 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:43,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:43,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:32:43,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:47,931 INFO L124 PetriNetUnfolderBase]: 9376/15182 cut-off events. [2024-06-21 17:32:47,932 INFO L125 PetriNetUnfolderBase]: For 1615477/1615494 co-relation queries the response was YES. [2024-06-21 17:32:48,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117588 conditions, 15182 events. 9376/15182 cut-off events. For 1615477/1615494 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 110499 event pairs, 2648 based on Foata normal form. 27/15207 useless extension candidates. Maximal degree in co-relation 117448. Up to 8281 conditions per place. [2024-06-21 17:32:48,161 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 205 selfloop transitions, 212 changer transitions 17/438 dead transitions. [2024-06-21 17:32:48,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 438 transitions, 7589 flow [2024-06-21 17:32:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:32:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:32:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-21 17:32:48,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44789356984478934 [2024-06-21 17:32:48,162 INFO L175 Difference]: Start difference. First operand has 284 places, 367 transitions, 6117 flow. Second operand 11 states and 202 transitions. [2024-06-21 17:32:48,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 438 transitions, 7589 flow [2024-06-21 17:32:50,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 438 transitions, 7160 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 17:32:50,999 INFO L231 Difference]: Finished difference. Result has 284 places, 362 transitions, 6059 flow [2024-06-21 17:32:50,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5700, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6059, PETRI_PLACES=284, PETRI_TRANSITIONS=362} [2024-06-21 17:32:51,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 17:32:51,000 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 362 transitions, 6059 flow [2024-06-21 17:32:51,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:51,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:32:51,000 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, 1, 1] [2024-06-21 17:32:51,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:32:51,000 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:32:51,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:32:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash -714412323, now seen corresponding path program 4 times [2024-06-21 17:32:51,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:32:51,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24600932] [2024-06-21 17:32:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:32:51,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:32:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:32:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:32:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:32:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24600932] [2024-06-21 17:32:54,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24600932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:32:54,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:32:54,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:32:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372281294] [2024-06-21 17:32:54,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:32:54,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:32:54,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:32:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:32:54,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:32:54,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:32:54,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 362 transitions, 6059 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:32:54,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:32:54,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:32:54,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:32:58,592 INFO L124 PetriNetUnfolderBase]: 9024/14638 cut-off events. [2024-06-21 17:32:58,593 INFO L125 PetriNetUnfolderBase]: For 1541399/1541416 co-relation queries the response was YES. [2024-06-21 17:32:58,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109044 conditions, 14638 events. 9024/14638 cut-off events. For 1541399/1541416 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 106801 event pairs, 4139 based on Foata normal form. 107/14743 useless extension candidates. Maximal degree in co-relation 108904. Up to 10441 conditions per place. [2024-06-21 17:32:58,900 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 192 changer transitions 27/434 dead transitions. [2024-06-21 17:32:58,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 434 transitions, 7351 flow [2024-06-21 17:32:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:32:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:32:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 215 transitions. [2024-06-21 17:32:58,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369918699186992 [2024-06-21 17:32:58,902 INFO L175 Difference]: Start difference. First operand has 284 places, 362 transitions, 6059 flow. Second operand 12 states and 215 transitions. [2024-06-21 17:32:58,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 434 transitions, 7351 flow [2024-06-21 17:33:01,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 434 transitions, 6915 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-21 17:33:01,431 INFO L231 Difference]: Finished difference. Result has 280 places, 348 transitions, 5822 flow [2024-06-21 17:33:01,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5822, PETRI_PLACES=280, PETRI_TRANSITIONS=348} [2024-06-21 17:33:01,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 17:33:01,432 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 348 transitions, 5822 flow [2024-06-21 17:33:01,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:01,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:01,432 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, 1, 1] [2024-06-21 17:33:01,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:33:01,432 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:01,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash -705841443, now seen corresponding path program 5 times [2024-06-21 17:33:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096531963] [2024-06-21 17:33:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:04,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:04,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096531963] [2024-06-21 17:33:04,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096531963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:04,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:04,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:04,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039976138] [2024-06-21 17:33:04,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:04,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:04,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:04,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:04,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:33:04,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 348 transitions, 5822 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:04,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:04,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:33:04,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:08,550 INFO L124 PetriNetUnfolderBase]: 8244/13418 cut-off events. [2024-06-21 17:33:08,550 INFO L125 PetriNetUnfolderBase]: For 1342898/1342915 co-relation queries the response was YES. [2024-06-21 17:33:08,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97777 conditions, 13418 events. 8244/13418 cut-off events. For 1342898/1342915 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 97079 event pairs, 4073 based on Foata normal form. 119/13535 useless extension candidates. Maximal degree in co-relation 97641. Up to 11261 conditions per place. [2024-06-21 17:33:08,728 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 176 changer transitions 42/410 dead transitions. [2024-06-21 17:33:08,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 410 transitions, 6888 flow [2024-06-21 17:33:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:33:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:33:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-21 17:33:08,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41260162601626016 [2024-06-21 17:33:08,730 INFO L175 Difference]: Start difference. First operand has 280 places, 348 transitions, 5822 flow. Second operand 12 states and 203 transitions. [2024-06-21 17:33:08,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 410 transitions, 6888 flow [2024-06-21 17:33:10,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 410 transitions, 6509 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 17:33:10,537 INFO L231 Difference]: Finished difference. Result has 277 places, 331 transitions, 5589 flow [2024-06-21 17:33:10,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5447, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5589, PETRI_PLACES=277, PETRI_TRANSITIONS=331} [2024-06-21 17:33:10,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-21 17:33:10,538 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 331 transitions, 5589 flow [2024-06-21 17:33:10,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:10,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:10,538 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, 1, 1] [2024-06-21 17:33:10,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:33:10,538 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:10,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:10,539 INFO L85 PathProgramCache]: Analyzing trace with hash 490268381, now seen corresponding path program 6 times [2024-06-21 17:33:10,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:10,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879611835] [2024-06-21 17:33:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:10,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:13,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:13,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879611835] [2024-06-21 17:33:13,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879611835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:13,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:13,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:13,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365633221] [2024-06-21 17:33:13,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:13,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:13,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:13,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:33:13,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 331 transitions, 5589 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:13,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:13,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:33:13,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:17,118 INFO L124 PetriNetUnfolderBase]: 7728/12572 cut-off events. [2024-06-21 17:33:17,118 INFO L125 PetriNetUnfolderBase]: For 1081935/1081952 co-relation queries the response was YES. [2024-06-21 17:33:17,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92295 conditions, 12572 events. 7728/12572 cut-off events. For 1081935/1081952 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 89833 event pairs, 3896 based on Foata normal form. 31/12601 useless extension candidates. Maximal degree in co-relation 92161. Up to 11072 conditions per place. [2024-06-21 17:33:17,251 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 172 changer transitions 16/378 dead transitions. [2024-06-21 17:33:17,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 378 transitions, 6521 flow [2024-06-21 17:33:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 17:33:17,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3991130820399113 [2024-06-21 17:33:17,253 INFO L175 Difference]: Start difference. First operand has 277 places, 331 transitions, 5589 flow. Second operand 11 states and 180 transitions. [2024-06-21 17:33:17,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 378 transitions, 6521 flow [2024-06-21 17:33:18,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 378 transitions, 6128 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 17:33:18,981 INFO L231 Difference]: Finished difference. Result has 269 places, 324 transitions, 5448 flow [2024-06-21 17:33:18,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5198, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5448, PETRI_PLACES=269, PETRI_TRANSITIONS=324} [2024-06-21 17:33:18,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-21 17:33:18,981 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 324 transitions, 5448 flow [2024-06-21 17:33:18,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:18,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:18,983 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, 1, 1] [2024-06-21 17:33:18,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:33:18,983 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:18,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:18,983 INFO L85 PathProgramCache]: Analyzing trace with hash 487411421, now seen corresponding path program 7 times [2024-06-21 17:33:18,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:18,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102711285] [2024-06-21 17:33:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:18,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:22,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:22,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102711285] [2024-06-21 17:33:22,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102711285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:22,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:22,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:22,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558514819] [2024-06-21 17:33:22,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:22,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:22,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:22,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:33:22,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 324 transitions, 5448 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:22,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:22,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:33:22,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:26,054 INFO L124 PetriNetUnfolderBase]: 8055/13061 cut-off events. [2024-06-21 17:33:26,055 INFO L125 PetriNetUnfolderBase]: For 1144430/1144447 co-relation queries the response was YES. [2024-06-21 17:33:26,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98036 conditions, 13061 events. 8055/13061 cut-off events. For 1144430/1144447 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 93206 event pairs, 3671 based on Foata normal form. 31/13090 useless extension candidates. Maximal degree in co-relation 97905. Up to 9649 conditions per place. [2024-06-21 17:33:26,205 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 190 selfloop transitions, 161 changer transitions 26/381 dead transitions. [2024-06-21 17:33:26,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 381 transitions, 6588 flow [2024-06-21 17:33:26,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:26,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:26,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 17:33:26,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:33:26,206 INFO L175 Difference]: Start difference. First operand has 269 places, 324 transitions, 5448 flow. Second operand 11 states and 187 transitions. [2024-06-21 17:33:26,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 381 transitions, 6588 flow [2024-06-21 17:33:27,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 381 transitions, 6234 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 17:33:27,980 INFO L231 Difference]: Finished difference. Result has 268 places, 310 transitions, 5166 flow [2024-06-21 17:33:27,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5098, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5166, PETRI_PLACES=268, PETRI_TRANSITIONS=310} [2024-06-21 17:33:27,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 17:33:27,981 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 310 transitions, 5166 flow [2024-06-21 17:33:27,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:27,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:27,981 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, 1, 1] [2024-06-21 17:33:27,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:33:27,982 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:27,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1974820315, now seen corresponding path program 8 times [2024-06-21 17:33:27,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:27,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564023654] [2024-06-21 17:33:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:27,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:31,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:31,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564023654] [2024-06-21 17:33:31,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564023654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:31,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:31,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:31,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514695826] [2024-06-21 17:33:31,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:31,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:31,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:31,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:31,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:31,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:33:31,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 310 transitions, 5166 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:31,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:31,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:33:31,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:35,061 INFO L124 PetriNetUnfolderBase]: 7544/12225 cut-off events. [2024-06-21 17:33:35,061 INFO L125 PetriNetUnfolderBase]: For 1071707/1071709 co-relation queries the response was YES. [2024-06-21 17:33:35,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88529 conditions, 12225 events. 7544/12225 cut-off events. For 1071707/1071709 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 86652 event pairs, 3223 based on Foata normal form. 98/12313 useless extension candidates. Maximal degree in co-relation 88398. Up to 7297 conditions per place. [2024-06-21 17:33:35,185 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 103 changer transitions 39/375 dead transitions. [2024-06-21 17:33:35,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 375 transitions, 6300 flow [2024-06-21 17:33:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:33:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:33:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 17:33:35,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43237250554323725 [2024-06-21 17:33:35,187 INFO L175 Difference]: Start difference. First operand has 268 places, 310 transitions, 5166 flow. Second operand 11 states and 195 transitions. [2024-06-21 17:33:35,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 375 transitions, 6300 flow [2024-06-21 17:33:36,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 375 transitions, 5872 flow, removed 17 selfloop flow, removed 14 redundant places. [2024-06-21 17:33:36,502 INFO L231 Difference]: Finished difference. Result has 260 places, 284 transitions, 4355 flow [2024-06-21 17:33:36,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4742, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4355, PETRI_PLACES=260, PETRI_TRANSITIONS=284} [2024-06-21 17:33:36,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 17:33:36,503 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 284 transitions, 4355 flow [2024-06-21 17:33:36,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:36,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:36,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:36,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:33:36,503 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:36,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:36,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1580176769, now seen corresponding path program 9 times [2024-06-21 17:33:36,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:36,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044489386] [2024-06-21 17:33:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:36,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:39,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:39,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044489386] [2024-06-21 17:33:39,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044489386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:39,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:39,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:39,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531275175] [2024-06-21 17:33:39,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:39,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:39,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:39,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:39,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:39,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:33:39,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 284 transitions, 4355 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:39,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:39,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:33:39,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:43,034 INFO L124 PetriNetUnfolderBase]: 6669/10875 cut-off events. [2024-06-21 17:33:43,035 INFO L125 PetriNetUnfolderBase]: For 957740/957769 co-relation queries the response was YES. [2024-06-21 17:33:43,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76679 conditions, 10875 events. 6669/10875 cut-off events. For 957740/957769 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 76326 event pairs, 3332 based on Foata normal form. 121/10985 useless extension candidates. Maximal degree in co-relation 76553. Up to 9395 conditions per place. [2024-06-21 17:33:43,148 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 71 changer transitions 39/338 dead transitions. [2024-06-21 17:33:43,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 338 transitions, 5264 flow [2024-06-21 17:33:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:33:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:33:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-21 17:33:43,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 17:33:43,151 INFO L175 Difference]: Start difference. First operand has 260 places, 284 transitions, 4355 flow. Second operand 12 states and 192 transitions. [2024-06-21 17:33:43,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 338 transitions, 5264 flow [2024-06-21 17:33:44,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 338 transitions, 5063 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-21 17:33:44,447 INFO L231 Difference]: Finished difference. Result has 258 places, 266 transitions, 3957 flow [2024-06-21 17:33:44,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3957, PETRI_PLACES=258, PETRI_TRANSITIONS=266} [2024-06-21 17:33:44,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-21 17:33:44,452 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 266 transitions, 3957 flow [2024-06-21 17:33:44,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:44,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:44,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:33:44,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:33:44,453 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:44,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1411252871, now seen corresponding path program 1 times [2024-06-21 17:33:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97987667] [2024-06-21 17:33:44,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:47,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:47,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97987667] [2024-06-21 17:33:47,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97987667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:47,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:47,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448309975] [2024-06-21 17:33:47,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:47,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:47,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:47,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:47,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:33:47,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 266 transitions, 3957 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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) [2024-06-21 17:33:47,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:47,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:33:47,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:50,127 INFO L124 PetriNetUnfolderBase]: 6142/9918 cut-off events. [2024-06-21 17:33:50,128 INFO L125 PetriNetUnfolderBase]: For 812069/812071 co-relation queries the response was YES. [2024-06-21 17:33:50,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72534 conditions, 9918 events. 6142/9918 cut-off events. For 812069/812071 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 67791 event pairs, 3132 based on Foata normal form. 10/9910 useless extension candidates. Maximal degree in co-relation 72409. Up to 9159 conditions per place. [2024-06-21 17:33:50,236 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 76 changer transitions 0/320 dead transitions. [2024-06-21 17:33:50,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 320 transitions, 4949 flow [2024-06-21 17:33:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:33:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:33:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 17:33:50,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 17:33:50,237 INFO L175 Difference]: Start difference. First operand has 258 places, 266 transitions, 3957 flow. Second operand 10 states and 171 transitions. [2024-06-21 17:33:50,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 320 transitions, 4949 flow [2024-06-21 17:33:51,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 320 transitions, 4718 flow, removed 26 selfloop flow, removed 13 redundant places. [2024-06-21 17:33:51,368 INFO L231 Difference]: Finished difference. Result has 253 places, 269 transitions, 3953 flow [2024-06-21 17:33:51,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3953, PETRI_PLACES=253, PETRI_TRANSITIONS=269} [2024-06-21 17:33:51,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 17:33:51,369 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 269 transitions, 3953 flow [2024-06-21 17:33:51,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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) [2024-06-21 17:33:51,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:51,369 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, 1, 1] [2024-06-21 17:33:51,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:33:51,370 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:51,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:51,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1293289439, now seen corresponding path program 10 times [2024-06-21 17:33:51,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:51,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832852114] [2024-06-21 17:33:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:51,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:33:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:33:54,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:33:54,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832852114] [2024-06-21 17:33:54,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832852114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:33:54,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:33:54,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:33:54,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29415446] [2024-06-21 17:33:54,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:33:54,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:33:54,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:33:54,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:33:54,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:33:54,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:33:54,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 269 transitions, 3953 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:54,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:33:54,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:33:54,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:33:57,150 INFO L124 PetriNetUnfolderBase]: 6027/9807 cut-off events. [2024-06-21 17:33:57,150 INFO L125 PetriNetUnfolderBase]: For 797682/797684 co-relation queries the response was YES. [2024-06-21 17:33:57,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69040 conditions, 9807 events. 6027/9807 cut-off events. For 797682/797684 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 67565 event pairs, 2973 based on Foata normal form. 56/9853 useless extension candidates. Maximal degree in co-relation 68917. Up to 8665 conditions per place. [2024-06-21 17:33:57,251 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 80 changer transitions 26/327 dead transitions. [2024-06-21 17:33:57,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 327 transitions, 4813 flow [2024-06-21 17:33:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:33:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:33:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-21 17:33:57,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39399624765478425 [2024-06-21 17:33:57,252 INFO L175 Difference]: Start difference. First operand has 253 places, 269 transitions, 3953 flow. Second operand 13 states and 210 transitions. [2024-06-21 17:33:57,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 327 transitions, 4813 flow [2024-06-21 17:33:58,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 327 transitions, 4701 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:33:58,200 INFO L231 Difference]: Finished difference. Result has 260 places, 255 transitions, 3688 flow [2024-06-21 17:33:58,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3688, PETRI_PLACES=260, PETRI_TRANSITIONS=255} [2024-06-21 17:33:58,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 17:33:58,201 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 255 transitions, 3688 flow [2024-06-21 17:33:58,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 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) [2024-06-21 17:33:58,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:33:58,201 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, 1, 1] [2024-06-21 17:33:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:33:58,201 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:33:58,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:33:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1292920291, now seen corresponding path program 1 times [2024-06-21 17:33:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:33:58,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361258912] [2024-06-21 17:33:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:33:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:33:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:01,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:01,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361258912] [2024-06-21 17:34:01,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361258912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:01,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:01,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:34:01,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6112054] [2024-06-21 17:34:01,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:01,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:34:01,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:01,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:34:01,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:34:01,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:34:01,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 255 transitions, 3688 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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) [2024-06-21 17:34:01,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:01,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:34:01,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:34:03,697 INFO L124 PetriNetUnfolderBase]: 5707/9265 cut-off events. [2024-06-21 17:34:03,698 INFO L125 PetriNetUnfolderBase]: For 735315/735317 co-relation queries the response was YES. [2024-06-21 17:34:03,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66036 conditions, 9265 events. 5707/9265 cut-off events. For 735315/735317 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 63099 event pairs, 2935 based on Foata normal form. 10/9263 useless extension candidates. Maximal degree in co-relation 65911. Up to 8536 conditions per place. [2024-06-21 17:34:03,812 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 72 changer transitions 0/305 dead transitions. [2024-06-21 17:34:03,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 305 transitions, 4492 flow [2024-06-21 17:34:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:34:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:34:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 17:34:03,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:34:03,813 INFO L175 Difference]: Start difference. First operand has 260 places, 255 transitions, 3688 flow. Second operand 10 states and 170 transitions. [2024-06-21 17:34:03,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 305 transitions, 4492 flow [2024-06-21 17:34:04,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 305 transitions, 4312 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 17:34:04,828 INFO L231 Difference]: Finished difference. Result has 257 places, 256 transitions, 3683 flow [2024-06-21 17:34:04,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3683, PETRI_PLACES=257, PETRI_TRANSITIONS=256} [2024-06-21 17:34:04,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-21 17:34:04,828 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 256 transitions, 3683 flow [2024-06-21 17:34:04,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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) [2024-06-21 17:34:04,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:34:04,829 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, 1, 1] [2024-06-21 17:34:04,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:34:04,829 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:34:04,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:34:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1292920477, now seen corresponding path program 1 times [2024-06-21 17:34:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:34:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155101616] [2024-06-21 17:34:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:34:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:34:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:34:08,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:34:08,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:34:08,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155101616] [2024-06-21 17:34:08,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155101616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:34:08,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:34:08,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:34:08,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615000602] [2024-06-21 17:34:08,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:34:08,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:34:08,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:34:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:34:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:34:08,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 17:34:08,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 256 transitions, 3683 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:34:08,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:34:08,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 17:34:08,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand