./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.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/rfi006_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/rfi006_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:43:53,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:43:53,481 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:43:53,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:43:53,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:43:53,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:43:53,506 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:43:53,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:43:53,507 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:43:53,507 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:43:53,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:43:53,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:43:53,508 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:43:53,508 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:43:53,508 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:43:53,509 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:43:53,509 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:43:53,509 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:43:53,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:43:53,510 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:43:53,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:43:53,515 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:43:53,515 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:43:53,516 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:43:53,516 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:43:53,516 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:43:53,516 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:43:53,516 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:43:53,517 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:43:53,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:43:53,517 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:43:53,517 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:43:53,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:43:53,518 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:43:53,518 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:43:53,518 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:43:53,518 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:43:53,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:43:53,518 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:43:53,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:43:53,519 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:43:53,520 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:43:53,520 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:43:53,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:43:53,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:43:53,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:43:53,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:43:53,767 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:43:53,768 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:43:53,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i [2024-06-27 20:43:54,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:43:55,002 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:43:55,004 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi006_rmo.i [2024-06-27 20:43:55,017 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c8b43f5/338f6d892e484a6c970906b6aa90c7ee/FLAG4bc7bdc2c [2024-06-27 20:43:55,030 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c8b43f5/338f6d892e484a6c970906b6aa90c7ee [2024-06-27 20:43:55,032 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:43:55,033 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:43:55,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/rfi006_rmo.yml/witness.yml [2024-06-27 20:43:55,194 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:43:55,195 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:43:55,196 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:43:55,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:43:55,200 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:43:55,201 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:43:55" (1/2) ... [2024-06-27 20:43:55,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b15799 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:55, skipping insertion in model container [2024-06-27 20:43:55,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:43:55" (1/2) ... [2024-06-27 20:43:55,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@168cb5c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:43:55, skipping insertion in model container [2024-06-27 20:43:55,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:55" (2/2) ... [2024-06-27 20:43:55,203 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b15799 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55, skipping insertion in model container [2024-06-27 20:43:55,203 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:55" (2/2) ... [2024-06-27 20:43:55,203 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:43:55,360 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:43:55,361 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:43:55,361 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$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 || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:43:55,361 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$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$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & x && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 20:43:55,361 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:43:55,361 INFO L106 edCorrectnessWitness]: ghost_update [L848-L848] multithreaded = 1; [2024-06-27 20:43:55,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:43:55,729 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:43:55,737 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:43:55,848 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:43:55,876 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:43:55,877 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55 WrapperNode [2024-06-27 20:43:55,877 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:43:55,878 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:43:55,878 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:43:55,878 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:43:55,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:55,908 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:55,951 INFO L138 Inliner]: procedures = 175, calls = 74, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2024-06-27 20:43:55,955 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:43:55,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:43:55,956 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:43:55,957 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:43:55,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:55,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:55,980 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:56,006 INFO L175 MemorySlicer]: Split 33 memory accesses to 2 slices as follows [2, 31]. 94 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-27 20:43:56,006 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:56,006 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:56,023 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:56,025 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:56,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:56,034 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:56,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:43:56,044 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:43:56,045 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:43:56,045 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:43:56,045 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (1/1) ... [2024-06-27 20:43:56,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:43:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:43:56,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:43:56,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:43:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 20:43:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 20:43:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 20:43:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 20:43:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:43:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:43:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:43:56,124 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:43:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:43:56,124 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:43:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:43:56,125 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:43:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:43:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 20:43:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:43:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:43:56,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:43:56,129 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:43:56,250 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:43:56,251 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:43:56,671 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:43:56,672 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:43:56,891 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:43:56,891 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:43:56,892 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:43:56 BoogieIcfgContainer [2024-06-27 20:43:56,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:43:56,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:43:56,895 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:43:56,897 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:43:56,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:43:55" (1/4) ... [2024-06-27 20:43:56,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1e6646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:43:56, skipping insertion in model container [2024-06-27 20:43:56,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:43:55" (2/4) ... [2024-06-27 20:43:56,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1e6646 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:43:56, skipping insertion in model container [2024-06-27 20:43:56,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:43:55" (3/4) ... [2024-06-27 20:43:56,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1e6646 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:43:56, skipping insertion in model container [2024-06-27 20:43:56,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:43:56" (4/4) ... [2024-06-27 20:43:56,900 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi006_rmo.i [2024-06-27 20:43:56,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:43:56,914 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:43:56,914 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:43:56,964 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:43:56,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:43:57,037 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:43:57,037 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:43:57,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:43:57,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:43:57,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:43:57,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:43:57,058 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;@76235be8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:43:57,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:43:57,063 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:43:57,063 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:43:57,063 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:43:57,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:57,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:43:57,065 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)] === [2024-06-27 20:43:57,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash 648656297, now seen corresponding path program 1 times [2024-06-27 20:43:57,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:57,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748218377] [2024-06-27 20:43:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:43:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:43:58,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:43:58,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748218377] [2024-06-27 20:43:58,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748218377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:43:58,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:43:58,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:43:58,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401109164] [2024-06-27 20:43:58,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:43:58,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:43:58,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:43:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:43:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:43:58,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:43:58,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:58,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:43:58,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:43:58,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:43:59,031 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-27 20:43:59,031 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 20:43:59,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7807 event pairs, 650 based on Foata normal form. 1/1551 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-27 20:43:59,044 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 20:43:59,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-27 20:43:59,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:43:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:43:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-27 20:43:59,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-27 20:43:59,055 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-27 20:43:59,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-27 20:43:59,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:43:59,059 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:43:59,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 20:43:59,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:43:59,063 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:43:59,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:43:59,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:43:59,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:43:59,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:43:59,064 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)] === [2024-06-27 20:43:59,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:43:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash 588479912, now seen corresponding path program 1 times [2024-06-27 20:43:59,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:43:59,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908047194] [2024-06-27 20:43:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:43:59,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:43:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:00,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:00,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908047194] [2024-06-27 20:44:00,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908047194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:00,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:00,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:44:00,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149243822] [2024-06-27 20:44:00,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:00,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:44:00,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:00,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:44:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:44:00,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:44:00,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:00,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:00,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:44:00,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:01,411 INFO L124 PetriNetUnfolderBase]: 984/1578 cut-off events. [2024-06-27 20:44:01,411 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2024-06-27 20:44:01,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587 conditions, 1578 events. 984/1578 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7740 event pairs, 540 based on Foata normal form. 3/1573 useless extension candidates. Maximal degree in co-relation 3575. Up to 1475 conditions per place. [2024-06-27 20:44:01,419 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 43 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-27 20:44:01,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 256 flow [2024-06-27 20:44:01,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:44:01,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:44:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-27 20:44:01,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-27 20:44:01,421 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 93 transitions. [2024-06-27 20:44:01,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 256 flow [2024-06-27 20:44:01,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:44:01,424 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:44:01,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 20:44:01,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:44:01,425 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:44:01,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:01,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:01,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:01,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:44:01,425 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)] === [2024-06-27 20:44:01,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:01,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1063009287, now seen corresponding path program 1 times [2024-06-27 20:44:01,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:01,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124889829] [2024-06-27 20:44:01,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:01,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:03,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:03,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124889829] [2024-06-27 20:44:03,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124889829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:03,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:03,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:44:03,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741057796] [2024-06-27 20:44:03,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:03,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:44:03,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:03,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:44:03,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:44:03,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:03,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:03,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:03,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:03,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:04,014 INFO L124 PetriNetUnfolderBase]: 1209/1891 cut-off events. [2024-06-27 20:44:04,014 INFO L125 PetriNetUnfolderBase]: For 982/982 co-relation queries the response was YES. [2024-06-27 20:44:04,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4798 conditions, 1891 events. 1209/1891 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9145 event pairs, 475 based on Foata normal form. 5/1890 useless extension candidates. Maximal degree in co-relation 4784. Up to 1726 conditions per place. [2024-06-27 20:44:04,024 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-27 20:44:04,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 420 flow [2024-06-27 20:44:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:44:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:44:04,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 20:44:04,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 20:44:04,026 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 119 transitions. [2024-06-27 20:44:04,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 420 flow [2024-06-27 20:44:04,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 81 transitions, 406 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:44:04,029 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 20:44:04,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 20:44:04,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:44:04,030 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 20:44:04,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:04,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:04,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:04,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:44:04,031 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)] === [2024-06-27 20:44:04,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:04,031 INFO L85 PathProgramCache]: Analyzing trace with hash -651441542, now seen corresponding path program 1 times [2024-06-27 20:44:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:04,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842968643] [2024-06-27 20:44:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:04,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:06,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842968643] [2024-06-27 20:44:06,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842968643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:06,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:06,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:44:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344721359] [2024-06-27 20:44:06,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:06,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:44:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:44:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:44:06,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:06,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:06,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:06,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:06,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:06,955 INFO L124 PetriNetUnfolderBase]: 1224/1916 cut-off events. [2024-06-27 20:44:06,956 INFO L125 PetriNetUnfolderBase]: For 2351/2354 co-relation queries the response was YES. [2024-06-27 20:44:06,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5767 conditions, 1916 events. 1224/1916 cut-off events. For 2351/2354 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9273 event pairs, 330 based on Foata normal form. 12/1922 useless extension candidates. Maximal degree in co-relation 5750. Up to 1687 conditions per place. [2024-06-27 20:44:06,967 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2024-06-27 20:44:06,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 89 transitions, 527 flow [2024-06-27 20:44:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 20:44:06,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-27 20:44:06,972 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 136 transitions. [2024-06-27 20:44:06,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 89 transitions, 527 flow [2024-06-27 20:44:06,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 519 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:44:06,979 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 293 flow [2024-06-27 20:44:06,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-06-27 20:44:06,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-27 20:44:06,981 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 293 flow [2024-06-27 20:44:06,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:06,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:06,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:06,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:44:06,982 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)] === [2024-06-27 20:44:06,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash 565299834, now seen corresponding path program 1 times [2024-06-27 20:44:06,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:06,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775720683] [2024-06-27 20:44:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:08,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:08,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775720683] [2024-06-27 20:44:08,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775720683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:08,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:08,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:44:08,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918004110] [2024-06-27 20:44:08,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:44:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:44:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:44:08,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:08,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:08,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:08,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:08,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:08,957 INFO L124 PetriNetUnfolderBase]: 1219/1906 cut-off events. [2024-06-27 20:44:08,958 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2024-06-27 20:44:08,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6271 conditions, 1906 events. 1219/1906 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9188 event pairs, 468 based on Foata normal form. 2/1902 useless extension candidates. Maximal degree in co-relation 6250. Up to 1831 conditions per place. [2024-06-27 20:44:08,968 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 53 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-27 20:44:08,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 449 flow [2024-06-27 20:44:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:44:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:44:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:44:08,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 20:44:08,970 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 293 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:44:08,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 449 flow [2024-06-27 20:44:08,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 399 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:08,977 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-27 20:44:08,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-27 20:44:08,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 20:44:08,980 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-27 20:44:08,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:08,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:08,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:08,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:44:08,980 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)] === [2024-06-27 20:44:08,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:08,981 INFO L85 PathProgramCache]: Analyzing trace with hash 343216375, now seen corresponding path program 1 times [2024-06-27 20:44:08,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:08,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522246727] [2024-06-27 20:44:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:08,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:10,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:10,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522246727] [2024-06-27 20:44:10,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522246727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:10,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:10,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:10,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054089823] [2024-06-27 20:44:10,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:10,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:10,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:10,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:10,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:10,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:10,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:10,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:10,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:11,560 INFO L124 PetriNetUnfolderBase]: 1209/1894 cut-off events. [2024-06-27 20:44:11,560 INFO L125 PetriNetUnfolderBase]: For 4025/4025 co-relation queries the response was YES. [2024-06-27 20:44:11,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6208 conditions, 1894 events. 1209/1894 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9070 event pairs, 438 based on Foata normal form. 4/1895 useless extension candidates. Maximal degree in co-relation 6185. Up to 1795 conditions per place. [2024-06-27 20:44:11,570 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-27 20:44:11,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 473 flow [2024-06-27 20:44:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:44:11,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:44:11,572 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:44:11,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 473 flow [2024-06-27 20:44:11,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 451 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:11,577 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 299 flow [2024-06-27 20:44:11,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-06-27 20:44:11,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:44:11,580 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 299 flow [2024-06-27 20:44:11,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:11,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:11,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:11,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:44:11,580 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)] === [2024-06-27 20:44:11,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:11,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1632155863, now seen corresponding path program 1 times [2024-06-27 20:44:11,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:11,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144400082] [2024-06-27 20:44:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:11,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:13,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:13,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144400082] [2024-06-27 20:44:13,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144400082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:13,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:13,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207561151] [2024-06-27 20:44:13,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:13,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:13,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:13,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:13,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:13,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:13,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:14,501 INFO L124 PetriNetUnfolderBase]: 1217/1905 cut-off events. [2024-06-27 20:44:14,501 INFO L125 PetriNetUnfolderBase]: For 5205/5211 co-relation queries the response was YES. [2024-06-27 20:44:14,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6693 conditions, 1905 events. 1217/1905 cut-off events. For 5205/5211 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9166 event pairs, 449 based on Foata normal form. 8/1909 useless extension candidates. Maximal degree in co-relation 6670. Up to 1737 conditions per place. [2024-06-27 20:44:14,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-27 20:44:14,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 561 flow [2024-06-27 20:44:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:44:14,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 20:44:14,512 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 299 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:44:14,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 561 flow [2024-06-27 20:44:14,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 531 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:14,515 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 341 flow [2024-06-27 20:44:14,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2024-06-27 20:44:14,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 20:44:14,516 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 341 flow [2024-06-27 20:44:14,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:14,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:14,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:14,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:44:14,517 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)] === [2024-06-27 20:44:14,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:14,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2087303353, now seen corresponding path program 2 times [2024-06-27 20:44:14,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:14,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969151850] [2024-06-27 20:44:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:14,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:16,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:16,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969151850] [2024-06-27 20:44:16,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969151850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:16,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:16,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:44:16,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261280747] [2024-06-27 20:44:16,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:16,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:44:16,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:44:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:44:16,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:16,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:16,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:16,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:16,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:17,269 INFO L124 PetriNetUnfolderBase]: 1205/1876 cut-off events. [2024-06-27 20:44:17,269 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2024-06-27 20:44:17,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6809 conditions, 1876 events. 1205/1876 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8939 event pairs, 467 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 6785. Up to 1721 conditions per place. [2024-06-27 20:44:17,281 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2024-06-27 20:44:17,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 531 flow [2024-06-27 20:44:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:44:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:44:17,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:44:17,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:44:17,283 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 341 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:44:17,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 531 flow [2024-06-27 20:44:17,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 502 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:17,288 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 360 flow [2024-06-27 20:44:17,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-27 20:44:17,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 20:44:17,289 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 360 flow [2024-06-27 20:44:17,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:17,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:17,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:17,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:44:17,289 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)] === [2024-06-27 20:44:17,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:17,290 INFO L85 PathProgramCache]: Analyzing trace with hash -416177340, now seen corresponding path program 1 times [2024-06-27 20:44:17,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:17,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256314706] [2024-06-27 20:44:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:17,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:19,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:19,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256314706] [2024-06-27 20:44:19,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256314706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:19,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:19,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:19,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070348597] [2024-06-27 20:44:19,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:19,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:19,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:19,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:19,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:19,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 360 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:19,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:19,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:19,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:20,962 INFO L124 PetriNetUnfolderBase]: 1749/2702 cut-off events. [2024-06-27 20:44:20,963 INFO L125 PetriNetUnfolderBase]: For 10432/10432 co-relation queries the response was YES. [2024-06-27 20:44:20,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9971 conditions, 2702 events. 1749/2702 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13616 event pairs, 427 based on Foata normal form. 16/2711 useless extension candidates. Maximal degree in co-relation 9946. Up to 1852 conditions per place. [2024-06-27 20:44:21,000 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 103 selfloop transitions, 57 changer transitions 0/165 dead transitions. [2024-06-27 20:44:21,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 165 transitions, 1271 flow [2024-06-27 20:44:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:44:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:44:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-27 20:44:21,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:44:21,002 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 360 flow. Second operand 12 states and 228 transitions. [2024-06-27 20:44:21,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 165 transitions, 1271 flow [2024-06-27 20:44:21,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 165 transitions, 1145 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:21,011 INFO L231 Difference]: Finished difference. Result has 77 places, 100 transitions, 739 flow [2024-06-27 20:44:21,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=739, PETRI_PLACES=77, PETRI_TRANSITIONS=100} [2024-06-27 20:44:21,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-27 20:44:21,012 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 100 transitions, 739 flow [2024-06-27 20:44:21,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:21,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:21,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:21,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:44:21,013 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)] === [2024-06-27 20:44:21,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:21,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1912989274, now seen corresponding path program 2 times [2024-06-27 20:44:21,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:21,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996790621] [2024-06-27 20:44:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:21,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:23,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:23,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996790621] [2024-06-27 20:44:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996790621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:23,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:23,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:23,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992498883] [2024-06-27 20:44:23,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:23,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:23,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:23,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:23,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 100 transitions, 739 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:23,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:23,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:23,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:24,722 INFO L124 PetriNetUnfolderBase]: 1837/2866 cut-off events. [2024-06-27 20:44:24,722 INFO L125 PetriNetUnfolderBase]: For 18095/18101 co-relation queries the response was YES. [2024-06-27 20:44:24,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13204 conditions, 2866 events. 1837/2866 cut-off events. For 18095/18101 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14779 event pairs, 468 based on Foata normal form. 16/2875 useless extension candidates. Maximal degree in co-relation 13171. Up to 2236 conditions per place. [2024-06-27 20:44:24,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 48 changer transitions 0/142 dead transitions. [2024-06-27 20:44:24,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 142 transitions, 1251 flow [2024-06-27 20:44:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:44:24,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:44:24,740 INFO L175 Difference]: Start difference. First operand has 77 places, 100 transitions, 739 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:44:24,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 142 transitions, 1251 flow [2024-06-27 20:44:24,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1209 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-27 20:44:24,758 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 884 flow [2024-06-27 20:44:24,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=884, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2024-06-27 20:44:24,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 20:44:24,758 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 884 flow [2024-06-27 20:44:24,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:24,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:24,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:24,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:44:24,759 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)] === [2024-06-27 20:44:24,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash 281896068, now seen corresponding path program 3 times [2024-06-27 20:44:24,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:24,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044519138] [2024-06-27 20:44:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:24,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:26,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:26,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044519138] [2024-06-27 20:44:26,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044519138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:26,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:26,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:26,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470951971] [2024-06-27 20:44:26,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:26,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:26,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:26,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:26,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:26,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:26,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 884 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:26,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:26,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:26,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:27,996 INFO L124 PetriNetUnfolderBase]: 1881/2919 cut-off events. [2024-06-27 20:44:27,997 INFO L125 PetriNetUnfolderBase]: For 21822/21826 co-relation queries the response was YES. [2024-06-27 20:44:28,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14316 conditions, 2919 events. 1881/2919 cut-off events. For 21822/21826 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14883 event pairs, 477 based on Foata normal form. 8/2909 useless extension candidates. Maximal degree in co-relation 14281. Up to 2254 conditions per place. [2024-06-27 20:44:28,015 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 87 selfloop transitions, 58 changer transitions 0/150 dead transitions. [2024-06-27 20:44:28,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 150 transitions, 1512 flow [2024-06-27 20:44:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:44:28,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:44:28,017 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 884 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:44:28,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 150 transitions, 1512 flow [2024-06-27 20:44:28,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 150 transitions, 1394 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 20:44:28,043 INFO L231 Difference]: Finished difference. Result has 85 places, 117 transitions, 1038 flow [2024-06-27 20:44:28,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1038, PETRI_PLACES=85, PETRI_TRANSITIONS=117} [2024-06-27 20:44:28,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 20:44:28,044 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 117 transitions, 1038 flow [2024-06-27 20:44:28,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:28,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:28,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:28,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:44:28,045 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)] === [2024-06-27 20:44:28,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:28,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1735620604, now seen corresponding path program 4 times [2024-06-27 20:44:28,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:28,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012144438] [2024-06-27 20:44:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:28,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:29,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012144438] [2024-06-27 20:44:29,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012144438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:29,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:29,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:29,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22936352] [2024-06-27 20:44:29,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:29,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:29,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:29,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:29,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:29,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 117 transitions, 1038 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:29,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:29,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:31,156 INFO L124 PetriNetUnfolderBase]: 1865/2897 cut-off events. [2024-06-27 20:44:31,157 INFO L125 PetriNetUnfolderBase]: For 21862/21872 co-relation queries the response was YES. [2024-06-27 20:44:31,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14070 conditions, 2897 events. 1865/2897 cut-off events. For 21862/21872 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14782 event pairs, 465 based on Foata normal form. 14/2895 useless extension candidates. Maximal degree in co-relation 14034. Up to 2247 conditions per place. [2024-06-27 20:44:31,173 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 83 selfloop transitions, 60 changer transitions 0/148 dead transitions. [2024-06-27 20:44:31,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 148 transitions, 1476 flow [2024-06-27 20:44:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 20:44:31,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-27 20:44:31,175 INFO L175 Difference]: Start difference. First operand has 85 places, 117 transitions, 1038 flow. Second operand 7 states and 134 transitions. [2024-06-27 20:44:31,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 148 transitions, 1476 flow [2024-06-27 20:44:31,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 148 transitions, 1385 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 20:44:31,201 INFO L231 Difference]: Finished difference. Result has 90 places, 117 transitions, 1077 flow [2024-06-27 20:44:31,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1077, PETRI_PLACES=90, PETRI_TRANSITIONS=117} [2024-06-27 20:44:31,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-27 20:44:31,203 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 117 transitions, 1077 flow [2024-06-27 20:44:31,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:31,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:31,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:31,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:44:31,204 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)] === [2024-06-27 20:44:31,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:31,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2028889739, now seen corresponding path program 1 times [2024-06-27 20:44:31,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:31,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866486713] [2024-06-27 20:44:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:31,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:33,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:33,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866486713] [2024-06-27 20:44:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866486713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:33,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:33,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:33,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191563114] [2024-06-27 20:44:33,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:33,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:33,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:33,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:33,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:33,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 117 transitions, 1077 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:33,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:33,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:33,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:34,562 INFO L124 PetriNetUnfolderBase]: 1917/3018 cut-off events. [2024-06-27 20:44:34,562 INFO L125 PetriNetUnfolderBase]: For 24444/24452 co-relation queries the response was YES. [2024-06-27 20:44:34,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14868 conditions, 3018 events. 1917/3018 cut-off events. For 24444/24452 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15783 event pairs, 487 based on Foata normal form. 16/3027 useless extension candidates. Maximal degree in co-relation 14829. Up to 2291 conditions per place. [2024-06-27 20:44:34,581 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 63 changer transitions 0/162 dead transitions. [2024-06-27 20:44:34,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 162 transitions, 1665 flow [2024-06-27 20:44:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:44:34,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 20:44:34,583 INFO L175 Difference]: Start difference. First operand has 90 places, 117 transitions, 1077 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:44:34,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 162 transitions, 1665 flow [2024-06-27 20:44:34,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 162 transitions, 1501 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:34,612 INFO L231 Difference]: Finished difference. Result has 90 places, 123 transitions, 1140 flow [2024-06-27 20:44:34,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1140, PETRI_PLACES=90, PETRI_TRANSITIONS=123} [2024-06-27 20:44:34,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-27 20:44:34,613 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 123 transitions, 1140 flow [2024-06-27 20:44:34,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:34,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:34,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:34,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:44:34,614 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)] === [2024-06-27 20:44:34,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:34,614 INFO L85 PathProgramCache]: Analyzing trace with hash 826876029, now seen corresponding path program 2 times [2024-06-27 20:44:34,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:34,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305077921] [2024-06-27 20:44:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:34,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:37,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:37,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305077921] [2024-06-27 20:44:37,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305077921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:37,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:37,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:37,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646783474] [2024-06-27 20:44:37,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:37,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:37,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:37,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:37,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:37,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:37,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 123 transitions, 1140 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:37,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:37,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:37,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:38,731 INFO L124 PetriNetUnfolderBase]: 1957/3081 cut-off events. [2024-06-27 20:44:38,731 INFO L125 PetriNetUnfolderBase]: For 26966/26972 co-relation queries the response was YES. [2024-06-27 20:44:38,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15275 conditions, 3081 events. 1957/3081 cut-off events. For 26966/26972 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16270 event pairs, 480 based on Foata normal form. 12/3086 useless extension candidates. Maximal degree in co-relation 15236. Up to 2326 conditions per place. [2024-06-27 20:44:38,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 68 changer transitions 0/170 dead transitions. [2024-06-27 20:44:38,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 170 transitions, 1754 flow [2024-06-27 20:44:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:38,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:44:38,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:44:38,749 INFO L175 Difference]: Start difference. First operand has 90 places, 123 transitions, 1140 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:44:38,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 170 transitions, 1754 flow [2024-06-27 20:44:38,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 170 transitions, 1539 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:44:38,779 INFO L231 Difference]: Finished difference. Result has 92 places, 129 transitions, 1163 flow [2024-06-27 20:44:38,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=92, PETRI_TRANSITIONS=129} [2024-06-27 20:44:38,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-27 20:44:38,780 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 129 transitions, 1163 flow [2024-06-27 20:44:38,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:38,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:38,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:38,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:44:38,780 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)] === [2024-06-27 20:44:38,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash 156196545, now seen corresponding path program 3 times [2024-06-27 20:44:38,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:38,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624994514] [2024-06-27 20:44:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:38,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:41,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:41,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624994514] [2024-06-27 20:44:41,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624994514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:41,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:41,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:41,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527698690] [2024-06-27 20:44:41,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:41,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:41,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:41,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:41,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 129 transitions, 1163 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:41,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:41,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:41,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:42,865 INFO L124 PetriNetUnfolderBase]: 2001/3164 cut-off events. [2024-06-27 20:44:42,865 INFO L125 PetriNetUnfolderBase]: For 28564/28572 co-relation queries the response was YES. [2024-06-27 20:44:42,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15766 conditions, 3164 events. 2001/3164 cut-off events. For 28564/28572 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16889 event pairs, 469 based on Foata normal form. 12/3162 useless extension candidates. Maximal degree in co-relation 15727. Up to 2364 conditions per place. [2024-06-27 20:44:42,881 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 78 changer transitions 0/179 dead transitions. [2024-06-27 20:44:42,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 179 transitions, 1811 flow [2024-06-27 20:44:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:44:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:44:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:44:42,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:44:42,884 INFO L175 Difference]: Start difference. First operand has 92 places, 129 transitions, 1163 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:44:42,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 179 transitions, 1811 flow [2024-06-27 20:44:42,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 179 transitions, 1686 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:42,914 INFO L231 Difference]: Finished difference. Result has 96 places, 135 transitions, 1289 flow [2024-06-27 20:44:42,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=96, PETRI_TRANSITIONS=135} [2024-06-27 20:44:42,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 20:44:42,915 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 135 transitions, 1289 flow [2024-06-27 20:44:42,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:42,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:42,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:42,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:44:42,916 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)] === [2024-06-27 20:44:42,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash 982661727, now seen corresponding path program 4 times [2024-06-27 20:44:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:42,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279888776] [2024-06-27 20:44:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:42,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:45,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:45,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279888776] [2024-06-27 20:44:45,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279888776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:45,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:45,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:45,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169840485] [2024-06-27 20:44:45,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:45,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:45,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:45,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:45,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:45,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:45,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 135 transitions, 1289 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:45,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:45,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:45,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:46,796 INFO L124 PetriNetUnfolderBase]: 1985/3114 cut-off events. [2024-06-27 20:44:46,797 INFO L125 PetriNetUnfolderBase]: For 31944/31948 co-relation queries the response was YES. [2024-06-27 20:44:46,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 3114 events. 1985/3114 cut-off events. For 31944/31948 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16355 event pairs, 503 based on Foata normal form. 8/3100 useless extension candidates. Maximal degree in co-relation 15765. Up to 2351 conditions per place. [2024-06-27 20:44:46,817 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 89 selfloop transitions, 76 changer transitions 0/170 dead transitions. [2024-06-27 20:44:46,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 170 transitions, 1753 flow [2024-06-27 20:44:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:44:46,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:44:46,821 INFO L175 Difference]: Start difference. First operand has 96 places, 135 transitions, 1289 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:44:46,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 170 transitions, 1753 flow [2024-06-27 20:44:46,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 170 transitions, 1530 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:44:46,858 INFO L231 Difference]: Finished difference. Result has 97 places, 135 transitions, 1229 flow [2024-06-27 20:44:46,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1229, PETRI_PLACES=97, PETRI_TRANSITIONS=135} [2024-06-27 20:44:46,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-27 20:44:46,859 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 135 transitions, 1229 flow [2024-06-27 20:44:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:46,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:46,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:46,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:44:46,859 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)] === [2024-06-27 20:44:46,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:46,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2030614550, now seen corresponding path program 1 times [2024-06-27 20:44:46,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:46,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39103453] [2024-06-27 20:44:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:46,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:49,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:49,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39103453] [2024-06-27 20:44:49,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39103453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:49,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:49,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:44:49,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914239393] [2024-06-27 20:44:49,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:49,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:44:49,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:44:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:44:49,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:49,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 135 transitions, 1229 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:49,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:49,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:49,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:50,704 INFO L124 PetriNetUnfolderBase]: 1977/3127 cut-off events. [2024-06-27 20:44:50,704 INFO L125 PetriNetUnfolderBase]: For 33148/33150 co-relation queries the response was YES. [2024-06-27 20:44:50,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15731 conditions, 3127 events. 1977/3127 cut-off events. For 33148/33150 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16565 event pairs, 567 based on Foata normal form. 4/3128 useless extension candidates. Maximal degree in co-relation 15690. Up to 2867 conditions per place. [2024-06-27 20:44:50,722 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 149 selfloop transitions, 16 changer transitions 0/170 dead transitions. [2024-06-27 20:44:50,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1692 flow [2024-06-27 20:44:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:44:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:44:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:44:50,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:44:50,724 INFO L175 Difference]: Start difference. First operand has 97 places, 135 transitions, 1229 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:44:50,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1692 flow [2024-06-27 20:44:50,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 170 transitions, 1484 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:44:50,757 INFO L231 Difference]: Finished difference. Result has 98 places, 140 transitions, 1119 flow [2024-06-27 20:44:50,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1119, PETRI_PLACES=98, PETRI_TRANSITIONS=140} [2024-06-27 20:44:50,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:44:50,757 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 140 transitions, 1119 flow [2024-06-27 20:44:50,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:50,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:50,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:50,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:44:50,758 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:50,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:50,758 INFO L85 PathProgramCache]: Analyzing trace with hash -877496395, now seen corresponding path program 1 times [2024-06-27 20:44:50,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:50,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128180279] [2024-06-27 20:44:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:50,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:51,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128180279] [2024-06-27 20:44:51,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128180279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:51,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:51,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:44:51,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397605892] [2024-06-27 20:44:51,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:44:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:44:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:44:51,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:44:51,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 140 transitions, 1119 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2024-06-27 20:44:51,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:51,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:44:51,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:52,738 INFO L124 PetriNetUnfolderBase]: 1840/2942 cut-off events. [2024-06-27 20:44:52,738 INFO L125 PetriNetUnfolderBase]: For 34113/34136 co-relation queries the response was YES. [2024-06-27 20:44:52,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14899 conditions, 2942 events. 1840/2942 cut-off events. For 34113/34136 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15866 event pairs, 518 based on Foata normal form. 12/2935 useless extension candidates. Maximal degree in co-relation 14856. Up to 2657 conditions per place. [2024-06-27 20:44:52,756 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 133 selfloop transitions, 8 changer transitions 0/154 dead transitions. [2024-06-27 20:44:52,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 154 transitions, 1457 flow [2024-06-27 20:44:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:44:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:44:52,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:44:52,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 20:44:52,757 INFO L175 Difference]: Start difference. First operand has 98 places, 140 transitions, 1119 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:44:52,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 154 transitions, 1457 flow [2024-06-27 20:44:52,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 154 transitions, 1406 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:44:52,793 INFO L231 Difference]: Finished difference. Result has 98 places, 143 transitions, 1122 flow [2024-06-27 20:44:52,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1122, PETRI_PLACES=98, PETRI_TRANSITIONS=143} [2024-06-27 20:44:52,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-27 20:44:52,793 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 143 transitions, 1122 flow [2024-06-27 20:44:52,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2024-06-27 20:44:52,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:52,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:52,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:44:52,794 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)] === [2024-06-27 20:44:52,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:52,794 INFO L85 PathProgramCache]: Analyzing trace with hash -254971351, now seen corresponding path program 1 times [2024-06-27 20:44:52,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:52,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596713530] [2024-06-27 20:44:52,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:52,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:54,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:54,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596713530] [2024-06-27 20:44:54,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596713530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:54,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:54,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:54,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829764941] [2024-06-27 20:44:54,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:54,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:54,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:54,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:54,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 143 transitions, 1122 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:54,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:54,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:54,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:55,881 INFO L124 PetriNetUnfolderBase]: 1991/3147 cut-off events. [2024-06-27 20:44:55,881 INFO L125 PetriNetUnfolderBase]: For 37070/37085 co-relation queries the response was YES. [2024-06-27 20:44:55,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16046 conditions, 3147 events. 1991/3147 cut-off events. For 37070/37085 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16704 event pairs, 344 based on Foata normal form. 16/3159 useless extension candidates. Maximal degree in co-relation 16002. Up to 2635 conditions per place. [2024-06-27 20:44:55,906 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 142 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-06-27 20:44:55,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 1676 flow [2024-06-27 20:44:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:44:55,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 20:44:55,908 INFO L175 Difference]: Start difference. First operand has 98 places, 143 transitions, 1122 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:44:55,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 1676 flow [2024-06-27 20:44:55,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 179 transitions, 1644 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:55,950 INFO L231 Difference]: Finished difference. Result has 102 places, 147 transitions, 1213 flow [2024-06-27 20:44:55,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1213, PETRI_PLACES=102, PETRI_TRANSITIONS=147} [2024-06-27 20:44:55,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-27 20:44:55,951 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 147 transitions, 1213 flow [2024-06-27 20:44:55,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:55,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:55,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:55,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:44:55,951 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:44:55,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:55,952 INFO L85 PathProgramCache]: Analyzing trace with hash -252114391, now seen corresponding path program 2 times [2024-06-27 20:44:55,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:55,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735324482] [2024-06-27 20:44:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:55,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:44:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:44:58,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:44:58,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735324482] [2024-06-27 20:44:58,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735324482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:44:58,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:44:58,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:44:58,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478504799] [2024-06-27 20:44:58,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:44:58,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:44:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:44:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:44:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:44:58,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:44:58,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 147 transitions, 1213 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:58,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:44:58,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:44:58,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:44:59,122 INFO L124 PetriNetUnfolderBase]: 1983/3124 cut-off events. [2024-06-27 20:44:59,122 INFO L125 PetriNetUnfolderBase]: For 40563/40570 co-relation queries the response was YES. [2024-06-27 20:44:59,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 3124 events. 1983/3124 cut-off events. For 40563/40570 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16495 event pairs, 462 based on Foata normal form. 8/3128 useless extension candidates. Maximal degree in co-relation 16341. Up to 2731 conditions per place. [2024-06-27 20:44:59,142 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 139 selfloop transitions, 33 changer transitions 0/177 dead transitions. [2024-06-27 20:44:59,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 177 transitions, 1647 flow [2024-06-27 20:44:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:44:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:44:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:44:59,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 20:44:59,144 INFO L175 Difference]: Start difference. First operand has 102 places, 147 transitions, 1213 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:44:59,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 177 transitions, 1647 flow [2024-06-27 20:44:59,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 177 transitions, 1583 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:44:59,189 INFO L231 Difference]: Finished difference. Result has 106 places, 147 transitions, 1224 flow [2024-06-27 20:44:59,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1224, PETRI_PLACES=106, PETRI_TRANSITIONS=147} [2024-06-27 20:44:59,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 20:44:59,190 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 147 transitions, 1224 flow [2024-06-27 20:44:59,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:44:59,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:44:59,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:44:59,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:44:59,191 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)] === [2024-06-27 20:44:59,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:44:59,191 INFO L85 PathProgramCache]: Analyzing trace with hash 685824276, now seen corresponding path program 1 times [2024-06-27 20:44:59,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:44:59,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255664322] [2024-06-27 20:44:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:44:59,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:44:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:01,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:01,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255664322] [2024-06-27 20:45:01,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255664322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:01,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:01,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:01,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828292220] [2024-06-27 20:45:01,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:01,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:01,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:01,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:01,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:01,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:01,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 147 transitions, 1224 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:01,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:01,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:01,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:02,706 INFO L124 PetriNetUnfolderBase]: 2147/3422 cut-off events. [2024-06-27 20:45:02,706 INFO L125 PetriNetUnfolderBase]: For 51018/51023 co-relation queries the response was YES. [2024-06-27 20:45:02,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18094 conditions, 3422 events. 2147/3422 cut-off events. For 51018/51023 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18646 event pairs, 400 based on Foata normal form. 16/3432 useless extension candidates. Maximal degree in co-relation 18047. Up to 1929 conditions per place. [2024-06-27 20:45:02,725 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 73 changer transitions 0/195 dead transitions. [2024-06-27 20:45:02,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 195 transitions, 1880 flow [2024-06-27 20:45:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:45:02,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:45:02,727 INFO L175 Difference]: Start difference. First operand has 106 places, 147 transitions, 1224 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:45:02,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 195 transitions, 1880 flow [2024-06-27 20:45:02,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 195 transitions, 1805 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:02,766 INFO L231 Difference]: Finished difference. Result has 108 places, 149 transitions, 1339 flow [2024-06-27 20:45:02,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1339, PETRI_PLACES=108, PETRI_TRANSITIONS=149} [2024-06-27 20:45:02,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 20:45:02,767 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 149 transitions, 1339 flow [2024-06-27 20:45:02,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:02,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:02,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:02,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:45:02,768 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)] === [2024-06-27 20:45:02,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -765943494, now seen corresponding path program 2 times [2024-06-27 20:45:02,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:02,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183658246] [2024-06-27 20:45:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:02,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:05,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:05,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183658246] [2024-06-27 20:45:05,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183658246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:05,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:05,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:05,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288974001] [2024-06-27 20:45:05,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:05,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:05,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:05,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:05,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:05,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 149 transitions, 1339 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:05,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:05,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:05,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:06,770 INFO L124 PetriNetUnfolderBase]: 2255/3611 cut-off events. [2024-06-27 20:45:06,771 INFO L125 PetriNetUnfolderBase]: For 58542/58551 co-relation queries the response was YES. [2024-06-27 20:45:06,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19346 conditions, 3611 events. 2255/3611 cut-off events. For 58542/58551 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 20222 event pairs, 538 based on Foata normal form. 28/3633 useless extension candidates. Maximal degree in co-relation 19298. Up to 2599 conditions per place. [2024-06-27 20:45:06,794 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 78 changer transitions 0/192 dead transitions. [2024-06-27 20:45:06,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 192 transitions, 1893 flow [2024-06-27 20:45:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:45:06,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-27 20:45:06,805 INFO L175 Difference]: Start difference. First operand has 108 places, 149 transitions, 1339 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:45:06,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 192 transitions, 1893 flow [2024-06-27 20:45:06,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 192 transitions, 1807 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:06,862 INFO L231 Difference]: Finished difference. Result has 112 places, 151 transitions, 1457 flow [2024-06-27 20:45:06,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1457, PETRI_PLACES=112, PETRI_TRANSITIONS=151} [2024-06-27 20:45:06,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 20:45:06,863 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 151 transitions, 1457 flow [2024-06-27 20:45:06,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:06,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:06,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:06,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:45:06,863 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)] === [2024-06-27 20:45:06,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash -765947214, now seen corresponding path program 3 times [2024-06-27 20:45:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:06,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631309829] [2024-06-27 20:45:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:06,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:09,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:09,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631309829] [2024-06-27 20:45:09,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631309829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:09,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:09,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067534703] [2024-06-27 20:45:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:09,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:09,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:09,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:09,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:09,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 151 transitions, 1457 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:09,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:09,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:09,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:10,590 INFO L124 PetriNetUnfolderBase]: 2323/3737 cut-off events. [2024-06-27 20:45:10,590 INFO L125 PetriNetUnfolderBase]: For 63444/63449 co-relation queries the response was YES. [2024-06-27 20:45:10,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20672 conditions, 3737 events. 2323/3737 cut-off events. For 63444/63449 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21160 event pairs, 554 based on Foata normal form. 16/3747 useless extension candidates. Maximal degree in co-relation 20622. Up to 2571 conditions per place. [2024-06-27 20:45:10,613 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 79 changer transitions 0/196 dead transitions. [2024-06-27 20:45:10,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 196 transitions, 2023 flow [2024-06-27 20:45:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:10,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:45:10,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:45:10,614 INFO L175 Difference]: Start difference. First operand has 112 places, 151 transitions, 1457 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:45:10,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 196 transitions, 2023 flow [2024-06-27 20:45:10,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 196 transitions, 1857 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:10,675 INFO L231 Difference]: Finished difference. Result has 114 places, 152 transitions, 1479 flow [2024-06-27 20:45:10,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1479, PETRI_PLACES=114, PETRI_TRANSITIONS=152} [2024-06-27 20:45:10,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-27 20:45:10,676 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 152 transitions, 1479 flow [2024-06-27 20:45:10,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:10,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:10,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:10,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:45:10,676 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)] === [2024-06-27 20:45:10,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1400196430, now seen corresponding path program 4 times [2024-06-27 20:45:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:10,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339482270] [2024-06-27 20:45:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:13,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:13,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339482270] [2024-06-27 20:45:13,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339482270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:13,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:13,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:13,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356224876] [2024-06-27 20:45:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:13,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:13,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:13,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:13,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:13,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:13,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 152 transitions, 1479 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:13,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:13,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:13,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:14,545 INFO L124 PetriNetUnfolderBase]: 2459/4008 cut-off events. [2024-06-27 20:45:14,546 INFO L125 PetriNetUnfolderBase]: For 72578/72589 co-relation queries the response was YES. [2024-06-27 20:45:14,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22102 conditions, 4008 events. 2459/4008 cut-off events. For 72578/72589 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23398 event pairs, 457 based on Foata normal form. 24/4026 useless extension candidates. Maximal degree in co-relation 22051. Up to 2663 conditions per place. [2024-06-27 20:45:14,568 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 81 changer transitions 0/204 dead transitions. [2024-06-27 20:45:14,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 204 transitions, 2193 flow [2024-06-27 20:45:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:14,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:45:14,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 20:45:14,570 INFO L175 Difference]: Start difference. First operand has 114 places, 152 transitions, 1479 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:45:14,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 204 transitions, 2193 flow [2024-06-27 20:45:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 2023 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:14,634 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1527 flow [2024-06-27 20:45:14,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1527, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2024-06-27 20:45:14,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 20:45:14,635 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1527 flow [2024-06-27 20:45:14,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:14,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:14,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:14,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:45:14,635 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)] === [2024-06-27 20:45:14,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1400048560, now seen corresponding path program 5 times [2024-06-27 20:45:14,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:14,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646691982] [2024-06-27 20:45:14,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:14,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:17,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:17,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646691982] [2024-06-27 20:45:17,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646691982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:17,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:17,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:45:17,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223486928] [2024-06-27 20:45:17,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:17,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:45:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:45:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:45:17,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:17,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1527 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:17,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:17,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:17,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:18,827 INFO L124 PetriNetUnfolderBase]: 2547/4156 cut-off events. [2024-06-27 20:45:18,827 INFO L125 PetriNetUnfolderBase]: For 79950/79961 co-relation queries the response was YES. [2024-06-27 20:45:18,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22977 conditions, 4156 events. 2547/4156 cut-off events. For 79950/79961 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24492 event pairs, 595 based on Foata normal form. 28/4178 useless extension candidates. Maximal degree in co-relation 22925. Up to 3139 conditions per place. [2024-06-27 20:45:18,852 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 78 changer transitions 0/201 dead transitions. [2024-06-27 20:45:18,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 201 transitions, 2117 flow [2024-06-27 20:45:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:45:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:45:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:45:18,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:45:18,853 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1527 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:45:18,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 201 transitions, 2117 flow [2024-06-27 20:45:18,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 201 transitions, 2010 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:18,920 INFO L231 Difference]: Finished difference. Result has 120 places, 155 transitions, 1613 flow [2024-06-27 20:45:18,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1613, PETRI_PLACES=120, PETRI_TRANSITIONS=155} [2024-06-27 20:45:18,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 20:45:18,920 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 155 transitions, 1613 flow [2024-06-27 20:45:18,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:18,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:18,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:18,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:45:18,921 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)] === [2024-06-27 20:45:18,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:18,921 INFO L85 PathProgramCache]: Analyzing trace with hash 58959260, now seen corresponding path program 6 times [2024-06-27 20:45:18,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:18,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060365561] [2024-06-27 20:45:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:18,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:21,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:21,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060365561] [2024-06-27 20:45:21,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060365561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:21,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:21,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:21,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102782307] [2024-06-27 20:45:21,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:21,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:21,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:21,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:21,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:21,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 155 transitions, 1613 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:21,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:21,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:21,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:23,429 INFO L124 PetriNetUnfolderBase]: 2635/4279 cut-off events. [2024-06-27 20:45:23,429 INFO L125 PetriNetUnfolderBase]: For 86418/86427 co-relation queries the response was YES. [2024-06-27 20:45:23,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24172 conditions, 4279 events. 2635/4279 cut-off events. For 86418/86427 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25336 event pairs, 614 based on Foata normal form. 24/4297 useless extension candidates. Maximal degree in co-relation 24118. Up to 3287 conditions per place. [2024-06-27 20:45:23,454 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 122 selfloop transitions, 77 changer transitions 0/204 dead transitions. [2024-06-27 20:45:23,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 2217 flow [2024-06-27 20:45:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:45:23,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:45:23,456 INFO L175 Difference]: Start difference. First operand has 120 places, 155 transitions, 1613 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:45:23,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 2217 flow [2024-06-27 20:45:23,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 204 transitions, 2052 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:23,538 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1641 flow [2024-06-27 20:45:23,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1641, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-27 20:45:23,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-27 20:45:23,539 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1641 flow [2024-06-27 20:45:23,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:23,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:23,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:23,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:45:23,539 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:23,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1610955960, now seen corresponding path program 1 times [2024-06-27 20:45:23,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:23,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297329403] [2024-06-27 20:45:23,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:23,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:25,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297329403] [2024-06-27 20:45:25,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297329403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:25,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:25,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:45:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785278233] [2024-06-27 20:45:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:45:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:45:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:45:25,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:25,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1641 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:25,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:25,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:25,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:26,269 INFO L124 PetriNetUnfolderBase]: 2470/4062 cut-off events. [2024-06-27 20:45:26,270 INFO L125 PetriNetUnfolderBase]: For 85490/85511 co-relation queries the response was YES. [2024-06-27 20:45:26,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23233 conditions, 4062 events. 2470/4062 cut-off events. For 85490/85511 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 24537 event pairs, 659 based on Foata normal form. 14/4037 useless extension candidates. Maximal degree in co-relation 23178. Up to 3689 conditions per place. [2024-06-27 20:45:26,296 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 15 changer transitions 0/182 dead transitions. [2024-06-27 20:45:26,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 182 transitions, 2091 flow [2024-06-27 20:45:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:45:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:45:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:45:26,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:45:26,297 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1641 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:45:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 182 transitions, 2091 flow [2024-06-27 20:45:26,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 182 transitions, 1926 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:26,378 INFO L231 Difference]: Finished difference. Result has 122 places, 161 transitions, 1577 flow [2024-06-27 20:45:26,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1577, PETRI_PLACES=122, PETRI_TRANSITIONS=161} [2024-06-27 20:45:26,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-27 20:45:26,379 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 161 transitions, 1577 flow [2024-06-27 20:45:26,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:26,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:26,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:26,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:45:26,379 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)] === [2024-06-27 20:45:26,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1530735204, now seen corresponding path program 7 times [2024-06-27 20:45:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:26,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101946160] [2024-06-27 20:45:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:26,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:29,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:29,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101946160] [2024-06-27 20:45:29,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101946160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:29,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:29,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:29,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314601211] [2024-06-27 20:45:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:29,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:29,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:29,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:29,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 161 transitions, 1577 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:29,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:29,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:29,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:30,863 INFO L124 PetriNetUnfolderBase]: 2711/4388 cut-off events. [2024-06-27 20:45:30,863 INFO L125 PetriNetUnfolderBase]: For 94877/94881 co-relation queries the response was YES. [2024-06-27 20:45:30,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24645 conditions, 4388 events. 2711/4388 cut-off events. For 94877/94881 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26083 event pairs, 628 based on Foata normal form. 22/4388 useless extension candidates. Maximal degree in co-relation 24589. Up to 3425 conditions per place. [2024-06-27 20:45:30,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 79 changer transitions 0/207 dead transitions. [2024-06-27 20:45:30,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 207 transitions, 2195 flow [2024-06-27 20:45:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:45:30,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:45:30,896 INFO L175 Difference]: Start difference. First operand has 122 places, 161 transitions, 1577 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:45:30,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 207 transitions, 2195 flow [2024-06-27 20:45:30,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 207 transitions, 2142 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:30,986 INFO L231 Difference]: Finished difference. Result has 127 places, 162 transitions, 1723 flow [2024-06-27 20:45:30,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1723, PETRI_PLACES=127, PETRI_TRANSITIONS=162} [2024-06-27 20:45:30,986 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-27 20:45:30,986 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 162 transitions, 1723 flow [2024-06-27 20:45:30,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:30,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:30,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:30,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:45:30,987 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)] === [2024-06-27 20:45:30,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1069141838, now seen corresponding path program 8 times [2024-06-27 20:45:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:30,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858118442] [2024-06-27 20:45:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:33,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:33,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858118442] [2024-06-27 20:45:33,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858118442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:33,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:33,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:33,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686751211] [2024-06-27 20:45:33,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:33,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:33,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:33,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:33,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:33,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 162 transitions, 1723 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:33,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:33,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:33,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:35,484 INFO L124 PetriNetUnfolderBase]: 2675/4362 cut-off events. [2024-06-27 20:45:35,484 INFO L125 PetriNetUnfolderBase]: For 94924/94932 co-relation queries the response was YES. [2024-06-27 20:45:35,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24504 conditions, 4362 events. 2675/4362 cut-off events. For 94924/94932 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26139 event pairs, 580 based on Foata normal form. 26/4374 useless extension candidates. Maximal degree in co-relation 24447. Up to 3369 conditions per place. [2024-06-27 20:45:35,510 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 81 changer transitions 0/214 dead transitions. [2024-06-27 20:45:35,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 214 transitions, 2349 flow [2024-06-27 20:45:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:45:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:45:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:45:35,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:45:35,511 INFO L175 Difference]: Start difference. First operand has 127 places, 162 transitions, 1723 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:45:35,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 214 transitions, 2349 flow [2024-06-27 20:45:35,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 214 transitions, 2168 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:45:35,612 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1713 flow [2024-06-27 20:45:35,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1713, PETRI_PLACES=130, PETRI_TRANSITIONS=162} [2024-06-27 20:45:35,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 20:45:35,613 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1713 flow [2024-06-27 20:45:35,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:35,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:35,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:35,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:45:35,613 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)] === [2024-06-27 20:45:35,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1530519723, now seen corresponding path program 1 times [2024-06-27 20:45:35,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:35,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055079989] [2024-06-27 20:45:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:35,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:38,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:38,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055079989] [2024-06-27 20:45:38,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055079989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:38,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:38,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:38,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953477132] [2024-06-27 20:45:38,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:38,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:38,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:38,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:38,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:38,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 1713 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:38,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:38,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:38,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:40,356 INFO L124 PetriNetUnfolderBase]: 2695/4359 cut-off events. [2024-06-27 20:45:40,356 INFO L125 PetriNetUnfolderBase]: For 92816/92820 co-relation queries the response was YES. [2024-06-27 20:45:40,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24656 conditions, 4359 events. 2695/4359 cut-off events. For 92816/92820 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25853 event pairs, 622 based on Foata normal form. 6/4339 useless extension candidates. Maximal degree in co-relation 24598. Up to 3533 conditions per place. [2024-06-27 20:45:40,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 84 changer transitions 0/207 dead transitions. [2024-06-27 20:45:40,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 207 transitions, 2345 flow [2024-06-27 20:45:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:45:40,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:45:40,390 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1713 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:45:40,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 207 transitions, 2345 flow [2024-06-27 20:45:40,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 207 transitions, 2147 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:45:40,490 INFO L231 Difference]: Finished difference. Result has 131 places, 168 transitions, 1790 flow [2024-06-27 20:45:40,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1790, PETRI_PLACES=131, PETRI_TRANSITIONS=168} [2024-06-27 20:45:40,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-27 20:45:40,491 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 168 transitions, 1790 flow [2024-06-27 20:45:40,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:40,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:40,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:40,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:45:40,491 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)] === [2024-06-27 20:45:40,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1239448631, now seen corresponding path program 2 times [2024-06-27 20:45:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:40,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742318425] [2024-06-27 20:45:40,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:40,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:43,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:43,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742318425] [2024-06-27 20:45:43,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742318425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:43,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:43,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:43,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426370785] [2024-06-27 20:45:43,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:43,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:43,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:43,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:43,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 168 transitions, 1790 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:43,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:43,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:43,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:45,443 INFO L124 PetriNetUnfolderBase]: 2737/4432 cut-off events. [2024-06-27 20:45:45,444 INFO L125 PetriNetUnfolderBase]: For 99733/99741 co-relation queries the response was YES. [2024-06-27 20:45:45,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25463 conditions, 4432 events. 2737/4432 cut-off events. For 99733/99741 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26381 event pairs, 606 based on Foata normal form. 10/4418 useless extension candidates. Maximal degree in co-relation 25403. Up to 3579 conditions per place. [2024-06-27 20:45:45,471 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 119 selfloop transitions, 91 changer transitions 0/215 dead transitions. [2024-06-27 20:45:45,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 215 transitions, 2466 flow [2024-06-27 20:45:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:45,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:45:45,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:45:45,473 INFO L175 Difference]: Start difference. First operand has 131 places, 168 transitions, 1790 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:45:45,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 215 transitions, 2466 flow [2024-06-27 20:45:45,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 215 transitions, 2246 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:45,568 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1892 flow [2024-06-27 20:45:45,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1892, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-27 20:45:45,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 20:45:45,569 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1892 flow [2024-06-27 20:45:45,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:45,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:45,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:45,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:45:45,569 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)] === [2024-06-27 20:45:45,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:45,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1495949141, now seen corresponding path program 3 times [2024-06-27 20:45:45,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:45,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523946904] [2024-06-27 20:45:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:45,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:48,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:48,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523946904] [2024-06-27 20:45:48,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523946904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:48,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:48,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:48,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87121459] [2024-06-27 20:45:48,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:48,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:48,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:48,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:48,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:48,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:48,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1892 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:48,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:48,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:48,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:50,204 INFO L124 PetriNetUnfolderBase]: 2729/4419 cut-off events. [2024-06-27 20:45:50,205 INFO L125 PetriNetUnfolderBase]: For 105024/105032 co-relation queries the response was YES. [2024-06-27 20:45:50,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25764 conditions, 4419 events. 2729/4419 cut-off events. For 105024/105032 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26285 event pairs, 604 based on Foata normal form. 10/4405 useless extension candidates. Maximal degree in co-relation 25702. Up to 3567 conditions per place. [2024-06-27 20:45:50,230 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 104 changer transitions 0/229 dead transitions. [2024-06-27 20:45:50,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 229 transitions, 2680 flow [2024-06-27 20:45:50,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:45:50,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:45:50,232 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1892 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:45:50,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 229 transitions, 2680 flow [2024-06-27 20:45:50,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 229 transitions, 2426 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:50,338 INFO L231 Difference]: Finished difference. Result has 139 places, 190 transitions, 2091 flow [2024-06-27 20:45:50,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1662, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2091, PETRI_PLACES=139, PETRI_TRANSITIONS=190} [2024-06-27 20:45:50,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 20:45:50,339 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 190 transitions, 2091 flow [2024-06-27 20:45:50,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:50,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:50,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:50,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:45:50,339 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)] === [2024-06-27 20:45:50,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1246867241, now seen corresponding path program 4 times [2024-06-27 20:45:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:50,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503628438] [2024-06-27 20:45:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:50,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:53,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:53,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503628438] [2024-06-27 20:45:53,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503628438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:53,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:53,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:45:53,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700164081] [2024-06-27 20:45:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:53,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:45:53,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:45:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:45:53,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:53,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 190 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:53,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:53,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:53,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:54,781 INFO L124 PetriNetUnfolderBase]: 2769/4498 cut-off events. [2024-06-27 20:45:54,781 INFO L125 PetriNetUnfolderBase]: For 110040/110048 co-relation queries the response was YES. [2024-06-27 20:45:54,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26345 conditions, 4498 events. 2769/4498 cut-off events. For 110040/110048 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 26998 event pairs, 522 based on Foata normal form. 10/4482 useless extension candidates. Maximal degree in co-relation 26281. Up to 3373 conditions per place. [2024-06-27 20:45:54,815 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 113 changer transitions 0/236 dead transitions. [2024-06-27 20:45:54,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 236 transitions, 2755 flow [2024-06-27 20:45:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:45:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:45:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:45:54,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:45:54,817 INFO L175 Difference]: Start difference. First operand has 139 places, 190 transitions, 2091 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:45:54,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 236 transitions, 2755 flow [2024-06-27 20:45:54,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 236 transitions, 2546 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 20:45:54,976 INFO L231 Difference]: Finished difference. Result has 145 places, 193 transitions, 2202 flow [2024-06-27 20:45:54,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2202, PETRI_PLACES=145, PETRI_TRANSITIONS=193} [2024-06-27 20:45:54,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 20:45:54,977 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 193 transitions, 2202 flow [2024-06-27 20:45:54,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:54,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:54,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:54,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:45:54,977 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:54,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:54,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1460399564, now seen corresponding path program 2 times [2024-06-27 20:45:54,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:54,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478558508] [2024-06-27 20:45:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:56,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:56,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478558508] [2024-06-27 20:45:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478558508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:56,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:56,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:45:56,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139766011] [2024-06-27 20:45:56,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:56,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:45:56,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:45:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:45:56,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:45:56,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 193 transitions, 2202 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:56,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:56,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:45:56,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:45:57,939 INFO L124 PetriNetUnfolderBase]: 2610/4364 cut-off events. [2024-06-27 20:45:57,939 INFO L125 PetriNetUnfolderBase]: For 112725/112769 co-relation queries the response was YES. [2024-06-27 20:45:57,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25394 conditions, 4364 events. 2610/4364 cut-off events. For 112725/112769 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27280 event pairs, 588 based on Foata normal form. 29/4353 useless extension candidates. Maximal degree in co-relation 25328. Up to 3915 conditions per place. [2024-06-27 20:45:57,976 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 176 selfloop transitions, 20 changer transitions 0/211 dead transitions. [2024-06-27 20:45:57,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2686 flow [2024-06-27 20:45:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:45:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:45:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 20:45:57,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:45:57,977 INFO L175 Difference]: Start difference. First operand has 145 places, 193 transitions, 2202 flow. Second operand 6 states and 105 transitions. [2024-06-27 20:45:57,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2686 flow [2024-06-27 20:45:58,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 211 transitions, 2446 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:45:58,193 INFO L231 Difference]: Finished difference. Result has 145 places, 196 transitions, 2060 flow [2024-06-27 20:45:58,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2060, PETRI_PLACES=145, PETRI_TRANSITIONS=196} [2024-06-27 20:45:58,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 20:45:58,194 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 196 transitions, 2060 flow [2024-06-27 20:45:58,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:45:58,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:45:58,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:45:58,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:45:58,194 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:45:58,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:45:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1467059852, now seen corresponding path program 1 times [2024-06-27 20:45:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:45:58,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216286784] [2024-06-27 20:45:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:45:58,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:45:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:45:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:45:59,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:45:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216286784] [2024-06-27 20:45:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216286784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:45:59,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:45:59,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:45:59,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111268200] [2024-06-27 20:45:59,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:45:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:45:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:45:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:45:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:45:59,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:45:59,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 196 transitions, 2060 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) [2024-06-27 20:45:59,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:45:59,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:45:59,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:00,882 INFO L124 PetriNetUnfolderBase]: 2773/4548 cut-off events. [2024-06-27 20:46:00,883 INFO L125 PetriNetUnfolderBase]: For 116763/116765 co-relation queries the response was YES. [2024-06-27 20:46:00,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25980 conditions, 4548 events. 2773/4548 cut-off events. For 116763/116765 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27546 event pairs, 670 based on Foata normal form. 2/4547 useless extension candidates. Maximal degree in co-relation 25913. Up to 4238 conditions per place. [2024-06-27 20:46:00,917 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 200 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-06-27 20:46:00,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 221 transitions, 2670 flow [2024-06-27 20:46:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:46:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:46:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:46:00,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:46:00,919 INFO L175 Difference]: Start difference. First operand has 145 places, 196 transitions, 2060 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:46:00,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 221 transitions, 2670 flow [2024-06-27 20:46:01,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 221 transitions, 2594 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:01,075 INFO L231 Difference]: Finished difference. Result has 147 places, 202 transitions, 2088 flow [2024-06-27 20:46:01,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2088, PETRI_PLACES=147, PETRI_TRANSITIONS=202} [2024-06-27 20:46:01,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-27 20:46:01,076 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 202 transitions, 2088 flow [2024-06-27 20:46:01,076 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) [2024-06-27 20:46:01,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:01,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:01,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:46:01,076 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)] === [2024-06-27 20:46:01,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:01,077 INFO L85 PathProgramCache]: Analyzing trace with hash -315525482, now seen corresponding path program 2 times [2024-06-27 20:46:01,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:01,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734676517] [2024-06-27 20:46:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:01,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:02,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734676517] [2024-06-27 20:46:02,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734676517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:02,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:02,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:46:02,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617129923] [2024-06-27 20:46:02,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:02,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:46:02,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:02,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:46:02,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:46:02,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:02,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 202 transitions, 2088 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) [2024-06-27 20:46:02,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:02,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:02,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:03,743 INFO L124 PetriNetUnfolderBase]: 2767/4541 cut-off events. [2024-06-27 20:46:03,743 INFO L125 PetriNetUnfolderBase]: For 121786/121791 co-relation queries the response was YES. [2024-06-27 20:46:03,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26170 conditions, 4541 events. 2767/4541 cut-off events. For 121786/121791 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 27514 event pairs, 669 based on Foata normal form. 4/4541 useless extension candidates. Maximal degree in co-relation 26102. Up to 4233 conditions per place. [2024-06-27 20:46:03,776 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 194 selfloop transitions, 16 changer transitions 0/215 dead transitions. [2024-06-27 20:46:03,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 2542 flow [2024-06-27 20:46:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:46:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:46:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 20:46:03,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:46:03,778 INFO L175 Difference]: Start difference. First operand has 147 places, 202 transitions, 2088 flow. Second operand 6 states and 100 transitions. [2024-06-27 20:46:03,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 2542 flow [2024-06-27 20:46:03,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 215 transitions, 2492 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-27 20:46:03,925 INFO L231 Difference]: Finished difference. Result has 151 places, 202 transitions, 2076 flow [2024-06-27 20:46:03,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2076, PETRI_PLACES=151, PETRI_TRANSITIONS=202} [2024-06-27 20:46:03,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-27 20:46:03,926 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 202 transitions, 2076 flow [2024-06-27 20:46:03,926 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) [2024-06-27 20:46:03,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:03,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:03,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:46:03,926 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:03,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:03,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1460384684, now seen corresponding path program 1 times [2024-06-27 20:46:03,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:03,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303593085] [2024-06-27 20:46:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:03,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:06,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303593085] [2024-06-27 20:46:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303593085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:06,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:06,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335230945] [2024-06-27 20:46:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:06,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:06,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:06,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:46:06,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 202 transitions, 2076 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:06,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:06,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:46:06,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:07,591 INFO L124 PetriNetUnfolderBase]: 2620/4326 cut-off events. [2024-06-27 20:46:07,592 INFO L125 PetriNetUnfolderBase]: For 126847/126886 co-relation queries the response was YES. [2024-06-27 20:46:07,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25241 conditions, 4326 events. 2620/4326 cut-off events. For 126847/126886 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26576 event pairs, 624 based on Foata normal form. 28/4307 useless extension candidates. Maximal degree in co-relation 25171. Up to 3952 conditions per place. [2024-06-27 20:46:07,628 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 190 selfloop transitions, 10 changer transitions 0/217 dead transitions. [2024-06-27 20:46:07,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 217 transitions, 2540 flow [2024-06-27 20:46:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:46:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:46:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 20:46:07,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:46:07,630 INFO L175 Difference]: Start difference. First operand has 151 places, 202 transitions, 2076 flow. Second operand 6 states and 102 transitions. [2024-06-27 20:46:07,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 217 transitions, 2540 flow [2024-06-27 20:46:07,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 217 transitions, 2490 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:07,784 INFO L231 Difference]: Finished difference. Result has 151 places, 204 transitions, 2085 flow [2024-06-27 20:46:07,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2085, PETRI_PLACES=151, PETRI_TRANSITIONS=204} [2024-06-27 20:46:07,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-27 20:46:07,785 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 204 transitions, 2085 flow [2024-06-27 20:46:07,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:07,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:07,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:07,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:46:07,785 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:07,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1588142021, now seen corresponding path program 1 times [2024-06-27 20:46:07,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:07,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697851355] [2024-06-27 20:46:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:07,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:09,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697851355] [2024-06-27 20:46:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697851355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:09,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:09,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:09,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558307016] [2024-06-27 20:46:09,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:09,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:09,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:09,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:09,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:09,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:09,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 204 transitions, 2085 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) [2024-06-27 20:46:09,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:09,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:09,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:11,216 INFO L124 PetriNetUnfolderBase]: 2834/4650 cut-off events. [2024-06-27 20:46:11,216 INFO L125 PetriNetUnfolderBase]: For 137759/137782 co-relation queries the response was YES. [2024-06-27 20:46:11,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27008 conditions, 4650 events. 2834/4650 cut-off events. For 137759/137782 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28400 event pairs, 565 based on Foata normal form. 30/4676 useless extension candidates. Maximal degree in co-relation 26938. Up to 4010 conditions per place. [2024-06-27 20:46:11,257 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 196 selfloop transitions, 58 changer transitions 0/259 dead transitions. [2024-06-27 20:46:11,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 259 transitions, 3047 flow [2024-06-27 20:46:11,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:46:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:46:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:46:11,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:46:11,259 INFO L175 Difference]: Start difference. First operand has 151 places, 204 transitions, 2085 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:46:11,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 259 transitions, 3047 flow [2024-06-27 20:46:11,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 259 transitions, 3004 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:11,483 INFO L231 Difference]: Finished difference. Result has 157 places, 223 transitions, 2409 flow [2024-06-27 20:46:11,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2409, PETRI_PLACES=157, PETRI_TRANSITIONS=223} [2024-06-27 20:46:11,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 20:46:11,483 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 223 transitions, 2409 flow [2024-06-27 20:46:11,483 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) [2024-06-27 20:46:11,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:11,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:11,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:46:11,484 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)] === [2024-06-27 20:46:11,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1834418350, now seen corresponding path program 1 times [2024-06-27 20:46:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:11,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680161651] [2024-06-27 20:46:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:14,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:14,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680161651] [2024-06-27 20:46:14,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680161651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:14,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:14,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:14,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160770439] [2024-06-27 20:46:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:14,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:14,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:14,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:14,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 223 transitions, 2409 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:14,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:14,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:14,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:17,237 INFO L124 PetriNetUnfolderBase]: 2930/4838 cut-off events. [2024-06-27 20:46:17,238 INFO L125 PetriNetUnfolderBase]: For 149472/149481 co-relation queries the response was YES. [2024-06-27 20:46:17,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28564 conditions, 4838 events. 2930/4838 cut-off events. For 149472/149481 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30016 event pairs, 632 based on Foata normal form. 16/4848 useless extension candidates. Maximal degree in co-relation 28492. Up to 3552 conditions per place. [2024-06-27 20:46:17,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 102 changer transitions 0/295 dead transitions. [2024-06-27 20:46:17,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 295 transitions, 3304 flow [2024-06-27 20:46:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:46:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:46:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-27 20:46:17,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:46:17,274 INFO L175 Difference]: Start difference. First operand has 157 places, 223 transitions, 2409 flow. Second operand 12 states and 219 transitions. [2024-06-27 20:46:17,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 295 transitions, 3304 flow [2024-06-27 20:46:17,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 295 transitions, 3196 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 20:46:17,476 INFO L231 Difference]: Finished difference. Result has 167 places, 230 transitions, 2638 flow [2024-06-27 20:46:17,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2638, PETRI_PLACES=167, PETRI_TRANSITIONS=230} [2024-06-27 20:46:17,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-27 20:46:17,478 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 230 transitions, 2638 flow [2024-06-27 20:46:17,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:17,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:17,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:17,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:46:17,478 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:17,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1043339639, now seen corresponding path program 2 times [2024-06-27 20:46:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918200837] [2024-06-27 20:46:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:19,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:19,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918200837] [2024-06-27 20:46:19,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918200837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:19,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:19,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:19,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648152529] [2024-06-27 20:46:19,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:19,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:19,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:19,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:19,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:19,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:19,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 230 transitions, 2638 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) [2024-06-27 20:46:19,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:19,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:19,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:20,804 INFO L124 PetriNetUnfolderBase]: 2914/4831 cut-off events. [2024-06-27 20:46:20,804 INFO L125 PetriNetUnfolderBase]: For 150580/150595 co-relation queries the response was YES. [2024-06-27 20:46:20,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28925 conditions, 4831 events. 2914/4831 cut-off events. For 150580/150595 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30127 event pairs, 614 based on Foata normal form. 20/4847 useless extension candidates. Maximal degree in co-relation 28849. Up to 4172 conditions per place. [2024-06-27 20:46:20,845 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 50 changer transitions 0/253 dead transitions. [2024-06-27 20:46:20,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 253 transitions, 3276 flow [2024-06-27 20:46:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:46:20,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:46:20,846 INFO L175 Difference]: Start difference. First operand has 167 places, 230 transitions, 2638 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:46:20,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 253 transitions, 3276 flow [2024-06-27 20:46:21,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 253 transitions, 2978 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-27 20:46:21,028 INFO L231 Difference]: Finished difference. Result has 164 places, 230 transitions, 2452 flow [2024-06-27 20:46:21,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2452, PETRI_PLACES=164, PETRI_TRANSITIONS=230} [2024-06-27 20:46:21,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 20:46:21,029 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 230 transitions, 2452 flow [2024-06-27 20:46:21,029 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) [2024-06-27 20:46:21,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:21,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:21,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:46:21,030 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)] === [2024-06-27 20:46:21,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:21,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1171352716, now seen corresponding path program 2 times [2024-06-27 20:46:21,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:21,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822007896] [2024-06-27 20:46:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:21,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:24,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:24,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822007896] [2024-06-27 20:46:24,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822007896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:24,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:24,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:24,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995570245] [2024-06-27 20:46:24,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:24,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:24,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:24,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:24,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:24,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 230 transitions, 2452 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:24,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:24,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:24,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:26,613 INFO L124 PetriNetUnfolderBase]: 3052/5071 cut-off events. [2024-06-27 20:46:26,613 INFO L125 PetriNetUnfolderBase]: For 158308/158316 co-relation queries the response was YES. [2024-06-27 20:46:26,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29496 conditions, 5071 events. 3052/5071 cut-off events. For 158308/158316 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32114 event pairs, 635 based on Foata normal form. 18/5075 useless extension candidates. Maximal degree in co-relation 29421. Up to 3898 conditions per place. [2024-06-27 20:46:26,655 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 126 changer transitions 0/314 dead transitions. [2024-06-27 20:46:26,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 314 transitions, 3511 flow [2024-06-27 20:46:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:46:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:46:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 232 transitions. [2024-06-27 20:46:26,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249084249084249 [2024-06-27 20:46:26,656 INFO L175 Difference]: Start difference. First operand has 164 places, 230 transitions, 2452 flow. Second operand 13 states and 232 transitions. [2024-06-27 20:46:26,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 314 transitions, 3511 flow [2024-06-27 20:46:26,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 314 transitions, 3411 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:46:26,858 INFO L231 Difference]: Finished difference. Result has 173 places, 247 transitions, 2858 flow [2024-06-27 20:46:26,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2858, PETRI_PLACES=173, PETRI_TRANSITIONS=247} [2024-06-27 20:46:26,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 20:46:26,858 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 247 transitions, 2858 flow [2024-06-27 20:46:26,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:26,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:26,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:26,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:46:26,859 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)] === [2024-06-27 20:46:26,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash -201469778, now seen corresponding path program 3 times [2024-06-27 20:46:26,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:26,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975741015] [2024-06-27 20:46:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:26,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:30,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:30,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975741015] [2024-06-27 20:46:30,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975741015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:30,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:30,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807224732] [2024-06-27 20:46:30,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:30,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:30,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:30,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 247 transitions, 2858 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:30,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:30,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:30,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:32,488 INFO L124 PetriNetUnfolderBase]: 3148/5236 cut-off events. [2024-06-27 20:46:32,488 INFO L125 PetriNetUnfolderBase]: For 169965/169969 co-relation queries the response was YES. [2024-06-27 20:46:32,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31084 conditions, 5236 events. 3148/5236 cut-off events. For 169965/169969 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33513 event pairs, 717 based on Foata normal form. 14/5228 useless extension candidates. Maximal degree in co-relation 31006. Up to 4066 conditions per place. [2024-06-27 20:46:32,530 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 121 changer transitions 0/308 dead transitions. [2024-06-27 20:46:32,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 308 transitions, 3726 flow [2024-06-27 20:46:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:46:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:46:32,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-27 20:46:32,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:46:32,532 INFO L175 Difference]: Start difference. First operand has 173 places, 247 transitions, 2858 flow. Second operand 12 states and 216 transitions. [2024-06-27 20:46:32,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 308 transitions, 3726 flow [2024-06-27 20:46:32,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 308 transitions, 3484 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:46:32,772 INFO L231 Difference]: Finished difference. Result has 180 places, 250 transitions, 2953 flow [2024-06-27 20:46:32,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2953, PETRI_PLACES=180, PETRI_TRANSITIONS=250} [2024-06-27 20:46:32,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 20:46:32,772 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 250 transitions, 2953 flow [2024-06-27 20:46:32,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:32,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:32,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:32,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:46:32,773 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)] === [2024-06-27 20:46:32,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:32,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1703654906, now seen corresponding path program 4 times [2024-06-27 20:46:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:32,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213541357] [2024-06-27 20:46:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:32,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:36,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213541357] [2024-06-27 20:46:36,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213541357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:36,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:36,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:36,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258647168] [2024-06-27 20:46:36,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:36,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:36,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:36,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:36,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:36,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:36,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 250 transitions, 2953 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:36,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:36,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:36,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:38,470 INFO L124 PetriNetUnfolderBase]: 3176/5327 cut-off events. [2024-06-27 20:46:38,470 INFO L125 PetriNetUnfolderBase]: For 166601/166609 co-relation queries the response was YES. [2024-06-27 20:46:38,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30702 conditions, 5327 events. 3176/5327 cut-off events. For 166601/166609 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34438 event pairs, 675 based on Foata normal form. 18/5331 useless extension candidates. Maximal degree in co-relation 30621. Up to 4118 conditions per place. [2024-06-27 20:46:38,514 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 123 changer transitions 0/316 dead transitions. [2024-06-27 20:46:38,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 316 transitions, 3808 flow [2024-06-27 20:46:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:46:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:46:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 234 transitions. [2024-06-27 20:46:38,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:46:38,515 INFO L175 Difference]: Start difference. First operand has 180 places, 250 transitions, 2953 flow. Second operand 13 states and 234 transitions. [2024-06-27 20:46:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 316 transitions, 3808 flow [2024-06-27 20:46:38,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 316 transitions, 3543 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:46:38,806 INFO L231 Difference]: Finished difference. Result has 186 places, 251 transitions, 2966 flow [2024-06-27 20:46:38,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2966, PETRI_PLACES=186, PETRI_TRANSITIONS=251} [2024-06-27 20:46:38,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 20:46:38,807 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 251 transitions, 2966 flow [2024-06-27 20:46:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:38,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:38,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:38,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:46:38,807 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:46:38,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash -574996306, now seen corresponding path program 5 times [2024-06-27 20:46:38,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:38,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892683991] [2024-06-27 20:46:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:41,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:41,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892683991] [2024-06-27 20:46:41,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892683991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:41,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:41,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:46:41,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227103756] [2024-06-27 20:46:41,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:41,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:46:41,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:46:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:46:41,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:41,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 251 transitions, 2966 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:41,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:41,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:41,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:44,259 INFO L124 PetriNetUnfolderBase]: 3156/5295 cut-off events. [2024-06-27 20:46:44,259 INFO L125 PetriNetUnfolderBase]: For 162293/162301 co-relation queries the response was YES. [2024-06-27 20:46:44,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30192 conditions, 5295 events. 3156/5295 cut-off events. For 162293/162301 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34177 event pairs, 619 based on Foata normal form. 18/5299 useless extension candidates. Maximal degree in co-relation 30109. Up to 3120 conditions per place. [2024-06-27 20:46:44,309 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 169 selfloop transitions, 139 changer transitions 0/313 dead transitions. [2024-06-27 20:46:44,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 313 transitions, 3722 flow [2024-06-27 20:46:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:46:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:46:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-27 20:46:44,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:46:44,311 INFO L175 Difference]: Start difference. First operand has 186 places, 251 transitions, 2966 flow. Second operand 12 states and 216 transitions. [2024-06-27 20:46:44,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 313 transitions, 3722 flow [2024-06-27 20:46:44,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 313 transitions, 3277 flow, removed 15 selfloop flow, removed 14 redundant places. [2024-06-27 20:46:44,576 INFO L231 Difference]: Finished difference. Result has 183 places, 250 transitions, 2733 flow [2024-06-27 20:46:44,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2733, PETRI_PLACES=183, PETRI_TRANSITIONS=250} [2024-06-27 20:46:44,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-27 20:46:44,577 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 250 transitions, 2733 flow [2024-06-27 20:46:44,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:46:44,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:44,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:44,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:46:44,577 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)] === [2024-06-27 20:46:44,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:44,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1032240089, now seen corresponding path program 3 times [2024-06-27 20:46:44,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:44,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514893772] [2024-06-27 20:46:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:44,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:46,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514893772] [2024-06-27 20:46:46,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514893772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:46,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:46,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:46,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938850220] [2024-06-27 20:46:46,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:46,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:46,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:46,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:46,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 250 transitions, 2733 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) [2024-06-27 20:46:46,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:46,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:46,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:48,210 INFO L124 PetriNetUnfolderBase]: 3164/5321 cut-off events. [2024-06-27 20:46:48,210 INFO L125 PetriNetUnfolderBase]: For 159045/159078 co-relation queries the response was YES. [2024-06-27 20:46:48,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29586 conditions, 5321 events. 3164/5321 cut-off events. For 159045/159078 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34564 event pairs, 701 based on Foata normal form. 20/5322 useless extension candidates. Maximal degree in co-relation 29505. Up to 4527 conditions per place. [2024-06-27 20:46:48,251 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 210 selfloop transitions, 61 changer transitions 0/276 dead transitions. [2024-06-27 20:46:48,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 276 transitions, 3609 flow [2024-06-27 20:46:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:46:48,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 20:46:48,252 INFO L175 Difference]: Start difference. First operand has 183 places, 250 transitions, 2733 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:46:48,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 276 transitions, 3609 flow [2024-06-27 20:46:48,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 276 transitions, 3247 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-27 20:46:48,466 INFO L231 Difference]: Finished difference. Result has 180 places, 258 transitions, 2631 flow [2024-06-27 20:46:48,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2631, PETRI_PLACES=180, PETRI_TRANSITIONS=258} [2024-06-27 20:46:48,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 20:46:48,467 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 258 transitions, 2631 flow [2024-06-27 20:46:48,467 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) [2024-06-27 20:46:48,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:48,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:46:48,467 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)] === [2024-06-27 20:46:48,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 484837853, now seen corresponding path program 1 times [2024-06-27 20:46:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:48,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336144860] [2024-06-27 20:46:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:48,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:50,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:50,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336144860] [2024-06-27 20:46:50,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336144860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:50,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:50,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:50,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574632564] [2024-06-27 20:46:50,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:50,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:50,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:50,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:50,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 258 transitions, 2631 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) [2024-06-27 20:46:50,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:50,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:50,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:51,994 INFO L124 PetriNetUnfolderBase]: 3174/5319 cut-off events. [2024-06-27 20:46:51,994 INFO L125 PetriNetUnfolderBase]: For 164555/164557 co-relation queries the response was YES. [2024-06-27 20:46:52,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29281 conditions, 5319 events. 3174/5319 cut-off events. For 164555/164557 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 34415 event pairs, 770 based on Foata normal form. 2/5318 useless extension candidates. Maximal degree in co-relation 29199. Up to 4888 conditions per place. [2024-06-27 20:46:52,046 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 260 selfloop transitions, 24 changer transitions 0/289 dead transitions. [2024-06-27 20:46:52,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 289 transitions, 3435 flow [2024-06-27 20:46:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:46:52,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:46:52,047 INFO L175 Difference]: Start difference. First operand has 180 places, 258 transitions, 2631 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:46:52,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 289 transitions, 3435 flow [2024-06-27 20:46:52,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 289 transitions, 3304 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 20:46:52,421 INFO L231 Difference]: Finished difference. Result has 184 places, 264 transitions, 2640 flow [2024-06-27 20:46:52,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2640, PETRI_PLACES=184, PETRI_TRANSITIONS=264} [2024-06-27 20:46:52,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-27 20:46:52,423 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 264 transitions, 2640 flow [2024-06-27 20:46:52,423 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) [2024-06-27 20:46:52,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:52,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:52,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:46:52,423 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)] === [2024-06-27 20:46:52,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1765786529, now seen corresponding path program 2 times [2024-06-27 20:46:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:52,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897885318] [2024-06-27 20:46:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:54,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:54,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897885318] [2024-06-27 20:46:54,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897885318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:54,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:54,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:54,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526757727] [2024-06-27 20:46:54,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:54,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:54,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:54,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:54,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:54,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 264 transitions, 2640 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) [2024-06-27 20:46:54,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:54,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:54,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:46:56,038 INFO L124 PetriNetUnfolderBase]: 3184/5333 cut-off events. [2024-06-27 20:46:56,038 INFO L125 PetriNetUnfolderBase]: For 171506/171508 co-relation queries the response was YES. [2024-06-27 20:46:56,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29653 conditions, 5333 events. 3184/5333 cut-off events. For 171506/171508 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 34454 event pairs, 770 based on Foata normal form. 2/5332 useless extension candidates. Maximal degree in co-relation 29569. Up to 4898 conditions per place. [2024-06-27 20:46:56,082 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 257 selfloop transitions, 26 changer transitions 0/288 dead transitions. [2024-06-27 20:46:56,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 288 transitions, 3398 flow [2024-06-27 20:46:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:46:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:46:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:46:56,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:46:56,083 INFO L175 Difference]: Start difference. First operand has 184 places, 264 transitions, 2640 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:46:56,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 288 transitions, 3398 flow [2024-06-27 20:46:56,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 288 transitions, 3318 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 20:46:56,428 INFO L231 Difference]: Finished difference. Result has 188 places, 267 transitions, 2664 flow [2024-06-27 20:46:56,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2664, PETRI_PLACES=188, PETRI_TRANSITIONS=267} [2024-06-27 20:46:56,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-27 20:46:56,428 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 267 transitions, 2664 flow [2024-06-27 20:46:56,428 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) [2024-06-27 20:46:56,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:46:56,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:46:56,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:46:56,429 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)] === [2024-06-27 20:46:56,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:46:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash -146553931, now seen corresponding path program 3 times [2024-06-27 20:46:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:46:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420067400] [2024-06-27 20:46:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:46:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:46:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:46:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:46:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:46:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420067400] [2024-06-27 20:46:58,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420067400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:46:58,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:46:58,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:46:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348417040] [2024-06-27 20:46:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:46:58,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:46:58,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:46:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:46:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:46:58,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:46:58,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 267 transitions, 2664 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) [2024-06-27 20:46:58,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:46:58,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:46:58,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:00,017 INFO L124 PetriNetUnfolderBase]: 3178/5327 cut-off events. [2024-06-27 20:47:00,018 INFO L125 PetriNetUnfolderBase]: For 175780/175785 co-relation queries the response was YES. [2024-06-27 20:47:00,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29639 conditions, 5327 events. 3178/5327 cut-off events. For 175780/175785 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34463 event pairs, 772 based on Foata normal form. 4/5326 useless extension candidates. Maximal degree in co-relation 29553. Up to 4893 conditions per place. [2024-06-27 20:47:00,059 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 26 changer transitions 0/282 dead transitions. [2024-06-27 20:47:00,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 282 transitions, 3256 flow [2024-06-27 20:47:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:47:00,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-27 20:47:00,064 INFO L175 Difference]: Start difference. First operand has 188 places, 267 transitions, 2664 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:47:00,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 282 transitions, 3256 flow [2024-06-27 20:47:00,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 282 transitions, 3186 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:00,380 INFO L231 Difference]: Finished difference. Result has 191 places, 267 transitions, 2652 flow [2024-06-27 20:47:00,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2652, PETRI_PLACES=191, PETRI_TRANSITIONS=267} [2024-06-27 20:47:00,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 20:47:00,381 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 267 transitions, 2652 flow [2024-06-27 20:47:00,381 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) [2024-06-27 20:47:00,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:00,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:00,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:47:00,382 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)] === [2024-06-27 20:47:00,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1997707733, now seen corresponding path program 1 times [2024-06-27 20:47:00,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:00,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438986549] [2024-06-27 20:47:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:00,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:02,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:02,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438986549] [2024-06-27 20:47:02,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438986549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:02,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:02,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:47:02,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917650453] [2024-06-27 20:47:02,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:02,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:47:02,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:47:02,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:47:02,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:02,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 267 transitions, 2652 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) [2024-06-27 20:47:02,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:02,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:02,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:03,955 INFO L124 PetriNetUnfolderBase]: 3238/5391 cut-off events. [2024-06-27 20:47:03,956 INFO L125 PetriNetUnfolderBase]: For 194275/194282 co-relation queries the response was YES. [2024-06-27 20:47:03,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30314 conditions, 5391 events. 3238/5391 cut-off events. For 194275/194282 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 34688 event pairs, 684 based on Foata normal form. 16/5403 useless extension candidates. Maximal degree in co-relation 30227. Up to 4666 conditions per place. [2024-06-27 20:47:03,996 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 70 changer transitions 0/311 dead transitions. [2024-06-27 20:47:03,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 311 transitions, 3706 flow [2024-06-27 20:47:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:47:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:47:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:47:03,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:47:03,998 INFO L175 Difference]: Start difference. First operand has 191 places, 267 transitions, 2652 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:47:03,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 311 transitions, 3706 flow [2024-06-27 20:47:04,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 311 transitions, 3628 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:04,281 INFO L231 Difference]: Finished difference. Result has 193 places, 279 transitions, 2891 flow [2024-06-27 20:47:04,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2891, PETRI_PLACES=193, PETRI_TRANSITIONS=279} [2024-06-27 20:47:04,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 20:47:04,282 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 279 transitions, 2891 flow [2024-06-27 20:47:04,282 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) [2024-06-27 20:47:04,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:04,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:04,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:47:04,282 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)] === [2024-06-27 20:47:04,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1306701129, now seen corresponding path program 2 times [2024-06-27 20:47:04,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:04,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974106284] [2024-06-27 20:47:04,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:04,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:06,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:06,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974106284] [2024-06-27 20:47:06,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974106284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:06,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:06,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:47:06,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206610946] [2024-06-27 20:47:06,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:06,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:47:06,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:47:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:47:06,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:06,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 279 transitions, 2891 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) [2024-06-27 20:47:06,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:06,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:06,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:07,720 INFO L124 PetriNetUnfolderBase]: 3206/5362 cut-off events. [2024-06-27 20:47:07,720 INFO L125 PetriNetUnfolderBase]: For 187586/187601 co-relation queries the response was YES. [2024-06-27 20:47:07,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30210 conditions, 5362 events. 3206/5362 cut-off events. For 187586/187601 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34682 event pairs, 680 based on Foata normal form. 20/5378 useless extension candidates. Maximal degree in co-relation 30122. Up to 4638 conditions per place. [2024-06-27 20:47:07,760 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 62 changer transitions 0/302 dead transitions. [2024-06-27 20:47:07,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 302 transitions, 3647 flow [2024-06-27 20:47:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:47:07,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:47:07,762 INFO L175 Difference]: Start difference. First operand has 193 places, 279 transitions, 2891 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:47:07,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 302 transitions, 3647 flow [2024-06-27 20:47:08,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 302 transitions, 3503 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:08,074 INFO L231 Difference]: Finished difference. Result has 195 places, 279 transitions, 2887 flow [2024-06-27 20:47:08,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2747, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2887, PETRI_PLACES=195, PETRI_TRANSITIONS=279} [2024-06-27 20:47:08,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 20:47:08,075 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 279 transitions, 2887 flow [2024-06-27 20:47:08,075 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) [2024-06-27 20:47:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:08,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:08,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:47:08,075 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)] === [2024-06-27 20:47:08,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:08,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1940390105, now seen corresponding path program 1 times [2024-06-27 20:47:08,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:08,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918683889] [2024-06-27 20:47:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:08,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:11,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918683889] [2024-06-27 20:47:11,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918683889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:11,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:11,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789822640] [2024-06-27 20:47:11,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:11,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:11,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:11,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:11,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:11,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:47:11,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 279 transitions, 2887 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:11,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:11,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:47:11,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:12,332 INFO L124 PetriNetUnfolderBase]: 3065/5169 cut-off events. [2024-06-27 20:47:12,332 INFO L125 PetriNetUnfolderBase]: For 188757/188789 co-relation queries the response was YES. [2024-06-27 20:47:12,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29273 conditions, 5169 events. 3065/5169 cut-off events. For 188757/188789 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33968 event pairs, 686 based on Foata normal form. 19/5141 useless extension candidates. Maximal degree in co-relation 29184. Up to 4622 conditions per place. [2024-06-27 20:47:12,378 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 262 selfloop transitions, 17 changer transitions 0/304 dead transitions. [2024-06-27 20:47:12,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 304 transitions, 3567 flow [2024-06-27 20:47:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:47:12,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:47:12,380 INFO L175 Difference]: Start difference. First operand has 195 places, 279 transitions, 2887 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:47:12,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 304 transitions, 3567 flow [2024-06-27 20:47:12,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 304 transitions, 3443 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:12,791 INFO L231 Difference]: Finished difference. Result has 196 places, 281 transitions, 2861 flow [2024-06-27 20:47:12,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2861, PETRI_PLACES=196, PETRI_TRANSITIONS=281} [2024-06-27 20:47:12,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 20:47:12,792 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 281 transitions, 2861 flow [2024-06-27 20:47:12,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:12,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:12,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:12,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:47:12,793 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)] === [2024-06-27 20:47:12,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1107578829, now seen corresponding path program 3 times [2024-06-27 20:47:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253714717] [2024-06-27 20:47:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:12,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:14,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:14,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253714717] [2024-06-27 20:47:14,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253714717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:14,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:14,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:47:14,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959240160] [2024-06-27 20:47:14,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:14,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:47:14,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:47:14,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:47:14,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:14,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 281 transitions, 2861 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) [2024-06-27 20:47:14,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:14,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:14,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:16,225 INFO L124 PetriNetUnfolderBase]: 3194/5333 cut-off events. [2024-06-27 20:47:16,225 INFO L125 PetriNetUnfolderBase]: For 191144/191150 co-relation queries the response was YES. [2024-06-27 20:47:16,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29899 conditions, 5333 events. 3194/5333 cut-off events. For 191144/191150 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34393 event pairs, 694 based on Foata normal form. 8/5327 useless extension candidates. Maximal degree in co-relation 29809. Up to 4798 conditions per place. [2024-06-27 20:47:16,273 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 36 changer transitions 0/304 dead transitions. [2024-06-27 20:47:16,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 304 transitions, 3531 flow [2024-06-27 20:47:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:47:16,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 20:47:16,274 INFO L175 Difference]: Start difference. First operand has 196 places, 281 transitions, 2861 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:47:16,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 304 transitions, 3531 flow [2024-06-27 20:47:16,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 304 transitions, 3431 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:16,581 INFO L231 Difference]: Finished difference. Result has 198 places, 281 transitions, 2841 flow [2024-06-27 20:47:16,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2841, PETRI_PLACES=198, PETRI_TRANSITIONS=281} [2024-06-27 20:47:16,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 20:47:16,582 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 281 transitions, 2841 flow [2024-06-27 20:47:16,582 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) [2024-06-27 20:47:16,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:16,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:16,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:47:16,582 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)] === [2024-06-27 20:47:16,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:16,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1095198669, now seen corresponding path program 4 times [2024-06-27 20:47:16,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:16,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781915542] [2024-06-27 20:47:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:16,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:18,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:18,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781915542] [2024-06-27 20:47:18,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781915542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:18,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:18,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:47:18,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506753631] [2024-06-27 20:47:18,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:18,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:47:18,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:47:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:47:18,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:18,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 281 transitions, 2841 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) [2024-06-27 20:47:18,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:18,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:18,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:20,228 INFO L124 PetriNetUnfolderBase]: 3204/5341 cut-off events. [2024-06-27 20:47:20,228 INFO L125 PetriNetUnfolderBase]: For 194344/194352 co-relation queries the response was YES. [2024-06-27 20:47:20,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30098 conditions, 5341 events. 3204/5341 cut-off events. For 194344/194352 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34341 event pairs, 687 based on Foata normal form. 8/5335 useless extension candidates. Maximal degree in co-relation 30007. Up to 4563 conditions per place. [2024-06-27 20:47:20,272 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 86 changer transitions 0/307 dead transitions. [2024-06-27 20:47:20,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 307 transitions, 3657 flow [2024-06-27 20:47:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:47:20,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:47:20,274 INFO L175 Difference]: Start difference. First operand has 198 places, 281 transitions, 2841 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:47:20,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 307 transitions, 3657 flow [2024-06-27 20:47:20,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 307 transitions, 3516 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:20,596 INFO L231 Difference]: Finished difference. Result has 198 places, 284 transitions, 2920 flow [2024-06-27 20:47:20,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2920, PETRI_PLACES=198, PETRI_TRANSITIONS=284} [2024-06-27 20:47:20,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 20:47:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 284 transitions, 2920 flow [2024-06-27 20:47:20,597 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) [2024-06-27 20:47:20,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:20,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:20,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:47:20,597 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)] === [2024-06-27 20:47:20,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1657945677, now seen corresponding path program 5 times [2024-06-27 20:47:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:20,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52104138] [2024-06-27 20:47:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:20,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:22,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:22,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52104138] [2024-06-27 20:47:22,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52104138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:22,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:22,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:47:22,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834571012] [2024-06-27 20:47:22,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:22,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:47:22,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:22,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:47:22,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:47:22,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:22,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 284 transitions, 2920 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) [2024-06-27 20:47:22,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:22,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:22,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:24,140 INFO L124 PetriNetUnfolderBase]: 3214/5373 cut-off events. [2024-06-27 20:47:24,140 INFO L125 PetriNetUnfolderBase]: For 201533/201566 co-relation queries the response was YES. [2024-06-27 20:47:24,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30534 conditions, 5373 events. 3214/5373 cut-off events. For 201533/201566 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34632 event pairs, 696 based on Foata normal form. 18/5372 useless extension candidates. Maximal degree in co-relation 30442. Up to 4569 conditions per place. [2024-06-27 20:47:24,188 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 82 changer transitions 0/304 dead transitions. [2024-06-27 20:47:24,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 304 transitions, 3718 flow [2024-06-27 20:47:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:47:24,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:47:24,189 INFO L175 Difference]: Start difference. First operand has 198 places, 284 transitions, 2920 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:47:24,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 304 transitions, 3718 flow [2024-06-27 20:47:24,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 304 transitions, 3565 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:24,449 INFO L231 Difference]: Finished difference. Result has 201 places, 287 transitions, 2985 flow [2024-06-27 20:47:24,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2770, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2985, PETRI_PLACES=201, PETRI_TRANSITIONS=287} [2024-06-27 20:47:24,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-27 20:47:24,449 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 287 transitions, 2985 flow [2024-06-27 20:47:24,450 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) [2024-06-27 20:47:24,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:24,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:24,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:47:24,450 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)] === [2024-06-27 20:47:24,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1010376755, now seen corresponding path program 6 times [2024-06-27 20:47:24,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:24,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91019099] [2024-06-27 20:47:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:24,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:26,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:26,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91019099] [2024-06-27 20:47:26,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91019099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:26,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:26,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:47:26,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916899921] [2024-06-27 20:47:26,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:26,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:47:26,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:26,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:47:26,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:47:26,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:26,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 287 transitions, 2985 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) [2024-06-27 20:47:26,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:26,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:26,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:28,021 INFO L124 PetriNetUnfolderBase]: 3198/5349 cut-off events. [2024-06-27 20:47:28,021 INFO L125 PetriNetUnfolderBase]: For 205425/205458 co-relation queries the response was YES. [2024-06-27 20:47:28,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30290 conditions, 5349 events. 3198/5349 cut-off events. For 205425/205458 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34498 event pairs, 697 based on Foata normal form. 20/5350 useless extension candidates. Maximal degree in co-relation 30197. Up to 4556 conditions per place. [2024-06-27 20:47:28,075 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 74 changer transitions 0/303 dead transitions. [2024-06-27 20:47:28,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 303 transitions, 3625 flow [2024-06-27 20:47:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:47:28,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:47:28,076 INFO L175 Difference]: Start difference. First operand has 201 places, 287 transitions, 2985 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:47:28,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 303 transitions, 3625 flow [2024-06-27 20:47:28,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 303 transitions, 3390 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:28,432 INFO L231 Difference]: Finished difference. Result has 203 places, 287 transitions, 2906 flow [2024-06-27 20:47:28,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2906, PETRI_PLACES=203, PETRI_TRANSITIONS=287} [2024-06-27 20:47:28,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 20:47:28,433 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 287 transitions, 2906 flow [2024-06-27 20:47:28,433 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) [2024-06-27 20:47:28,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:28,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:28,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:47:28,433 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)] === [2024-06-27 20:47:28,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1024195253, now seen corresponding path program 2 times [2024-06-27 20:47:28,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147516214] [2024-06-27 20:47:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:28,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:31,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:31,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147516214] [2024-06-27 20:47:31,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147516214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:31,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:31,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:31,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666552183] [2024-06-27 20:47:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:31,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:31,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:31,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:47:31,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 287 transitions, 2906 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:31,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:31,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:47:31,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:32,767 INFO L124 PetriNetUnfolderBase]: 3060/5175 cut-off events. [2024-06-27 20:47:32,768 INFO L125 PetriNetUnfolderBase]: For 210644/210680 co-relation queries the response was YES. [2024-06-27 20:47:32,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29429 conditions, 5175 events. 3060/5175 cut-off events. For 210644/210680 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34037 event pairs, 660 based on Foata normal form. 23/5158 useless extension candidates. Maximal degree in co-relation 29335. Up to 4606 conditions per place. [2024-06-27 20:47:32,819 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 257 selfloop transitions, 22 changer transitions 0/306 dead transitions. [2024-06-27 20:47:32,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 306 transitions, 3572 flow [2024-06-27 20:47:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:47:32,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 20:47:32,821 INFO L175 Difference]: Start difference. First operand has 203 places, 287 transitions, 2906 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:47:32,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 306 transitions, 3572 flow [2024-06-27 20:47:33,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 306 transitions, 3390 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:47:33,125 INFO L231 Difference]: Finished difference. Result has 203 places, 289 transitions, 2835 flow [2024-06-27 20:47:33,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2835, PETRI_PLACES=203, PETRI_TRANSITIONS=289} [2024-06-27 20:47:33,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 20:47:33,125 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 289 transitions, 2835 flow [2024-06-27 20:47:33,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:33,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:33,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:33,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:47:33,126 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)] === [2024-06-27 20:47:33,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:33,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1024670483, now seen corresponding path program 3 times [2024-06-27 20:47:33,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:33,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347117065] [2024-06-27 20:47:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:33,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:35,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:35,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347117065] [2024-06-27 20:47:35,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347117065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:35,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:35,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:35,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145020294] [2024-06-27 20:47:35,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:35,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:35,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:35,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:47:35,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 289 transitions, 2835 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:35,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:35,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:47:35,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:37,240 INFO L124 PetriNetUnfolderBase]: 3055/5168 cut-off events. [2024-06-27 20:47:37,241 INFO L125 PetriNetUnfolderBase]: For 214987/215023 co-relation queries the response was YES. [2024-06-27 20:47:37,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29197 conditions, 5168 events. 3055/5168 cut-off events. For 214987/215023 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 33945 event pairs, 659 based on Foata normal form. 23/5151 useless extension candidates. Maximal degree in co-relation 29102. Up to 4577 conditions per place. [2024-06-27 20:47:37,292 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 254 selfloop transitions, 27 changer transitions 0/308 dead transitions. [2024-06-27 20:47:37,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 308 transitions, 3509 flow [2024-06-27 20:47:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:47:37,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-27 20:47:37,294 INFO L175 Difference]: Start difference. First operand has 203 places, 289 transitions, 2835 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:47:37,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 308 transitions, 3509 flow [2024-06-27 20:47:37,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 308 transitions, 3414 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:37,694 INFO L231 Difference]: Finished difference. Result has 205 places, 291 transitions, 2865 flow [2024-06-27 20:47:37,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2865, PETRI_PLACES=205, PETRI_TRANSITIONS=291} [2024-06-27 20:47:37,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-27 20:47:37,695 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 291 transitions, 2865 flow [2024-06-27 20:47:37,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:47:37,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:37,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:37,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:47:37,695 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)] === [2024-06-27 20:47:37,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:37,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1099952333, now seen corresponding path program 1 times [2024-06-27 20:47:37,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:37,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519360355] [2024-06-27 20:47:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:40,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:40,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519360355] [2024-06-27 20:47:40,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519360355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:40,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:40,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:40,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52064274] [2024-06-27 20:47:40,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:40,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:40,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:40,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 291 transitions, 2865 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) [2024-06-27 20:47:40,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:40,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:40,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:41,965 INFO L124 PetriNetUnfolderBase]: 3211/5376 cut-off events. [2024-06-27 20:47:41,965 INFO L125 PetriNetUnfolderBase]: For 220294/220296 co-relation queries the response was YES. [2024-06-27 20:47:41,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30363 conditions, 5376 events. 3211/5376 cut-off events. For 220294/220296 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34811 event pairs, 790 based on Foata normal form. 2/5375 useless extension candidates. Maximal degree in co-relation 30267. Up to 4967 conditions per place. [2024-06-27 20:47:42,015 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 17 changer transitions 0/320 dead transitions. [2024-06-27 20:47:42,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 320 transitions, 3603 flow [2024-06-27 20:47:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:47:42,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-27 20:47:42,016 INFO L175 Difference]: Start difference. First operand has 205 places, 291 transitions, 2865 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:47:42,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 320 transitions, 3603 flow [2024-06-27 20:47:42,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 320 transitions, 3494 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:42,323 INFO L231 Difference]: Finished difference. Result has 208 places, 294 transitions, 2838 flow [2024-06-27 20:47:42,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2838, PETRI_PLACES=208, PETRI_TRANSITIONS=294} [2024-06-27 20:47:42,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 20:47:42,324 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 294 transitions, 2838 flow [2024-06-27 20:47:42,324 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) [2024-06-27 20:47:42,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:42,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:42,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:47:42,324 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)] === [2024-06-27 20:47:42,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1099832363, now seen corresponding path program 2 times [2024-06-27 20:47:42,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:42,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859923756] [2024-06-27 20:47:42,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:42,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:44,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:44,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859923756] [2024-06-27 20:47:44,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859923756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:44,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:44,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:44,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561331223] [2024-06-27 20:47:44,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:44,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:44,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:44,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:44,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 294 transitions, 2838 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) [2024-06-27 20:47:44,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:44,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:44,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:46,514 INFO L124 PetriNetUnfolderBase]: 3221/5390 cut-off events. [2024-06-27 20:47:46,514 INFO L125 PetriNetUnfolderBase]: For 226460/226462 co-relation queries the response was YES. [2024-06-27 20:47:46,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30759 conditions, 5390 events. 3221/5390 cut-off events. For 226460/226462 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34860 event pairs, 769 based on Foata normal form. 2/5389 useless extension candidates. Maximal degree in co-relation 30662. Up to 4916 conditions per place. [2024-06-27 20:47:46,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 286 selfloop transitions, 36 changer transitions 0/327 dead transitions. [2024-06-27 20:47:46,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 327 transitions, 3752 flow [2024-06-27 20:47:46,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:47:46,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:47:46,568 INFO L175 Difference]: Start difference. First operand has 208 places, 294 transitions, 2838 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:47:46,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 327 transitions, 3752 flow [2024-06-27 20:47:46,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 327 transitions, 3692 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:47:46,888 INFO L231 Difference]: Finished difference. Result has 210 places, 300 transitions, 2946 flow [2024-06-27 20:47:46,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2946, PETRI_PLACES=210, PETRI_TRANSITIONS=300} [2024-06-27 20:47:46,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-27 20:47:46,889 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 300 transitions, 2946 flow [2024-06-27 20:47:46,889 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) [2024-06-27 20:47:46,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:46,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:46,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:47:46,889 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)] === [2024-06-27 20:47:46,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1095190733, now seen corresponding path program 3 times [2024-06-27 20:47:46,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:46,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112256815] [2024-06-27 20:47:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:46,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:49,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:49,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112256815] [2024-06-27 20:47:49,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112256815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:49,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:49,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:49,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089759859] [2024-06-27 20:47:49,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:49,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:49,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:49,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:49,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 300 transitions, 2946 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) [2024-06-27 20:47:49,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:49,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:49,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:51,099 INFO L124 PetriNetUnfolderBase]: 3231/5408 cut-off events. [2024-06-27 20:47:51,099 INFO L125 PetriNetUnfolderBase]: For 235197/235199 co-relation queries the response was YES. [2024-06-27 20:47:51,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31327 conditions, 5408 events. 3231/5408 cut-off events. For 235197/235199 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35043 event pairs, 771 based on Foata normal form. 2/5407 useless extension candidates. Maximal degree in co-relation 31229. Up to 4926 conditions per place. [2024-06-27 20:47:51,144 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 38 changer transitions 0/326 dead transitions. [2024-06-27 20:47:51,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 326 transitions, 3812 flow [2024-06-27 20:47:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:47:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:47:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:47:51,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:47:51,146 INFO L175 Difference]: Start difference. First operand has 210 places, 300 transitions, 2946 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:47:51,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 326 transitions, 3812 flow [2024-06-27 20:47:51,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 326 transitions, 3738 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 20:47:51,499 INFO L231 Difference]: Finished difference. Result has 214 places, 303 transitions, 3002 flow [2024-06-27 20:47:51,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3002, PETRI_PLACES=214, PETRI_TRANSITIONS=303} [2024-06-27 20:47:51,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-27 20:47:51,499 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 303 transitions, 3002 flow [2024-06-27 20:47:51,499 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) [2024-06-27 20:47:51,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:51,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:51,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:47:51,500 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)] === [2024-06-27 20:47:51,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1095183789, now seen corresponding path program 1 times [2024-06-27 20:47:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587295739] [2024-06-27 20:47:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:54,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:54,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587295739] [2024-06-27 20:47:54,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587295739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:54,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:54,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:54,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018906429] [2024-06-27 20:47:54,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:54,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:54,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:54,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:54,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:54,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:54,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 303 transitions, 3002 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) [2024-06-27 20:47:54,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:54,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:54,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:47:55,704 INFO L124 PetriNetUnfolderBase]: 3239/5420 cut-off events. [2024-06-27 20:47:55,704 INFO L125 PetriNetUnfolderBase]: For 242327/242329 co-relation queries the response was YES. [2024-06-27 20:47:55,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31592 conditions, 5420 events. 3239/5420 cut-off events. For 242327/242329 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35124 event pairs, 775 based on Foata normal form. 2/5419 useless extension candidates. Maximal degree in co-relation 31492. Up to 5009 conditions per place. [2024-06-27 20:47:55,757 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 302 selfloop transitions, 18 changer transitions 0/325 dead transitions. [2024-06-27 20:47:55,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 325 transitions, 3730 flow [2024-06-27 20:47:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:47:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:47:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:47:55,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:47:55,759 INFO L175 Difference]: Start difference. First operand has 214 places, 303 transitions, 3002 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:47:55,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 325 transitions, 3730 flow [2024-06-27 20:47:56,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 325 transitions, 3644 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:47:56,308 INFO L231 Difference]: Finished difference. Result has 216 places, 305 transitions, 2997 flow [2024-06-27 20:47:56,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2997, PETRI_PLACES=216, PETRI_TRANSITIONS=305} [2024-06-27 20:47:56,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 20:47:56,309 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 305 transitions, 2997 flow [2024-06-27 20:47:56,309 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) [2024-06-27 20:47:56,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:47:56,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:47:56,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:47:56,310 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)] === [2024-06-27 20:47:56,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:47:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1731024919, now seen corresponding path program 2 times [2024-06-27 20:47:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:47:56,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949240736] [2024-06-27 20:47:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:47:56,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:47:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:47:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:47:59,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:47:59,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949240736] [2024-06-27 20:47:59,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949240736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:47:59,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:47:59,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:47:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889163355] [2024-06-27 20:47:59,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:47:59,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:47:59,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:47:59,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:47:59,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:47:59,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:47:59,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 305 transitions, 2997 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) [2024-06-27 20:47:59,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:47:59,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:47:59,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:00,489 INFO L124 PetriNetUnfolderBase]: 3247/5433 cut-off events. [2024-06-27 20:48:00,489 INFO L125 PetriNetUnfolderBase]: For 250155/250160 co-relation queries the response was YES. [2024-06-27 20:48:00,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31793 conditions, 5433 events. 3247/5433 cut-off events. For 250155/250160 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35201 event pairs, 776 based on Foata normal form. 4/5433 useless extension candidates. Maximal degree in co-relation 31692. Up to 5021 conditions per place. [2024-06-27 20:48:00,543 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 299 selfloop transitions, 18 changer transitions 0/322 dead transitions. [2024-06-27 20:48:00,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 322 transitions, 3709 flow [2024-06-27 20:48:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:48:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:48:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:48:00,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 20:48:00,544 INFO L175 Difference]: Start difference. First operand has 216 places, 305 transitions, 2997 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:48:00,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 322 transitions, 3709 flow [2024-06-27 20:48:01,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 322 transitions, 3644 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:01,032 INFO L231 Difference]: Finished difference. Result has 218 places, 307 transitions, 3017 flow [2024-06-27 20:48:01,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2932, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3017, PETRI_PLACES=218, PETRI_TRANSITIONS=307} [2024-06-27 20:48:01,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 20:48:01,032 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 307 transitions, 3017 flow [2024-06-27 20:48:01,033 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) [2024-06-27 20:48:01,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:01,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:01,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:48:01,033 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)] === [2024-06-27 20:48:01,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:01,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1379376511, now seen corresponding path program 4 times [2024-06-27 20:48:01,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:01,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557216745] [2024-06-27 20:48:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:01,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:03,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:03,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557216745] [2024-06-27 20:48:03,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557216745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:03,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:03,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:03,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590199634] [2024-06-27 20:48:03,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:03,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:03,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:03,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:03,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:03,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:03,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 307 transitions, 3017 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) [2024-06-27 20:48:03,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:03,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:03,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:05,221 INFO L124 PetriNetUnfolderBase]: 3241/5425 cut-off events. [2024-06-27 20:48:05,222 INFO L125 PetriNetUnfolderBase]: For 253978/253983 co-relation queries the response was YES. [2024-06-27 20:48:05,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31768 conditions, 5425 events. 3241/5425 cut-off events. For 253978/253983 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35132 event pairs, 784 based on Foata normal form. 2/5421 useless extension candidates. Maximal degree in co-relation 31666. Up to 4945 conditions per place. [2024-06-27 20:48:05,278 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 281 selfloop transitions, 38 changer transitions 0/324 dead transitions. [2024-06-27 20:48:05,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 3697 flow [2024-06-27 20:48:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:05,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:48:05,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 20:48:05,279 INFO L175 Difference]: Start difference. First operand has 218 places, 307 transitions, 3017 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:48:05,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 3697 flow [2024-06-27 20:48:05,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 324 transitions, 3610 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:05,824 INFO L231 Difference]: Finished difference. Result has 221 places, 307 transitions, 3012 flow [2024-06-27 20:48:05,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3012, PETRI_PLACES=221, PETRI_TRANSITIONS=307} [2024-06-27 20:48:05,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 20:48:05,825 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 307 transitions, 3012 flow [2024-06-27 20:48:05,825 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) [2024-06-27 20:48:05,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:05,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:05,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:48:05,826 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)] === [2024-06-27 20:48:05,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1024676435, now seen corresponding path program 3 times [2024-06-27 20:48:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:05,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589721101] [2024-06-27 20:48:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:05,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:08,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:08,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589721101] [2024-06-27 20:48:08,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589721101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:08,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:08,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:08,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031337593] [2024-06-27 20:48:08,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:08,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:08,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:08,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:08,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:08,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:08,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 307 transitions, 3012 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) [2024-06-27 20:48:08,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:08,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:09,864 INFO L124 PetriNetUnfolderBase]: 3236/5418 cut-off events. [2024-06-27 20:48:09,865 INFO L125 PetriNetUnfolderBase]: For 256995/257000 co-relation queries the response was YES. [2024-06-27 20:48:09,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31681 conditions, 5418 events. 3236/5418 cut-off events. For 256995/257000 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35096 event pairs, 773 based on Foata normal form. 4/5418 useless extension candidates. Maximal degree in co-relation 31578. Up to 4986 conditions per place. [2024-06-27 20:48:09,916 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 296 selfloop transitions, 23 changer transitions 0/324 dead transitions. [2024-06-27 20:48:09,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 324 transitions, 3732 flow [2024-06-27 20:48:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:48:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:48:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:48:09,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-27 20:48:09,918 INFO L175 Difference]: Start difference. First operand has 221 places, 307 transitions, 3012 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:48:09,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 324 transitions, 3732 flow [2024-06-27 20:48:10,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 324 transitions, 3614 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:10,372 INFO L231 Difference]: Finished difference. Result has 220 places, 309 transitions, 2993 flow [2024-06-27 20:48:10,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2993, PETRI_PLACES=220, PETRI_TRANSITIONS=309} [2024-06-27 20:48:10,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 20:48:10,373 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 309 transitions, 2993 flow [2024-06-27 20:48:10,373 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) [2024-06-27 20:48:10,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:10,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:10,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:48:10,373 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)] === [2024-06-27 20:48:10,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:10,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1469549822, now seen corresponding path program 1 times [2024-06-27 20:48:10,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:10,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171764431] [2024-06-27 20:48:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:10,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:12,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:12,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171764431] [2024-06-27 20:48:12,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171764431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:12,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:12,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:12,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447592786] [2024-06-27 20:48:12,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:12,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:12,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:12,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:12,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:12,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 309 transitions, 2993 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) [2024-06-27 20:48:12,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:12,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:12,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:14,548 INFO L124 PetriNetUnfolderBase]: 3410/5671 cut-off events. [2024-06-27 20:48:14,548 INFO L125 PetriNetUnfolderBase]: For 339301/339322 co-relation queries the response was YES. [2024-06-27 20:48:14,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34889 conditions, 5671 events. 3410/5671 cut-off events. For 339301/339322 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36664 event pairs, 580 based on Foata normal form. 36/5703 useless extension candidates. Maximal degree in co-relation 34785. Up to 4658 conditions per place. [2024-06-27 20:48:14,599 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 279 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-27 20:48:14,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 361 transitions, 4107 flow [2024-06-27 20:48:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:48:14,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 20:48:14,600 INFO L175 Difference]: Start difference. First operand has 220 places, 309 transitions, 2993 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:48:14,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 361 transitions, 4107 flow [2024-06-27 20:48:15,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 361 transitions, 4024 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:48:15,007 INFO L231 Difference]: Finished difference. Result has 225 places, 313 transitions, 3177 flow [2024-06-27 20:48:15,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3177, PETRI_PLACES=225, PETRI_TRANSITIONS=313} [2024-06-27 20:48:15,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-27 20:48:15,008 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 313 transitions, 3177 flow [2024-06-27 20:48:15,008 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) [2024-06-27 20:48:15,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:15,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:15,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:48:15,008 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)] === [2024-06-27 20:48:15,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:15,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1491141092, now seen corresponding path program 2 times [2024-06-27 20:48:15,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:15,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930894652] [2024-06-27 20:48:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:15,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:17,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:17,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930894652] [2024-06-27 20:48:17,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930894652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:17,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:17,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:17,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323751074] [2024-06-27 20:48:17,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:17,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:17,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:17,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:17,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:17,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:17,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 313 transitions, 3177 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) [2024-06-27 20:48:17,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:17,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:17,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:19,222 INFO L124 PetriNetUnfolderBase]: 3482/5807 cut-off events. [2024-06-27 20:48:19,222 INFO L125 PetriNetUnfolderBase]: For 361443/361464 co-relation queries the response was YES. [2024-06-27 20:48:19,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36364 conditions, 5807 events. 3482/5807 cut-off events. For 361443/361464 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 37926 event pairs, 726 based on Foata normal form. 40/5843 useless extension candidates. Maximal degree in co-relation 36259. Up to 4978 conditions per place. [2024-06-27 20:48:19,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 72 changer transitions 0/355 dead transitions. [2024-06-27 20:48:19,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 355 transitions, 4067 flow [2024-06-27 20:48:19,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:19,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:48:19,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:48:19,286 INFO L175 Difference]: Start difference. First operand has 225 places, 313 transitions, 3177 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:48:19,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 355 transitions, 4067 flow [2024-06-27 20:48:19,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 355 transitions, 3913 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:19,770 INFO L231 Difference]: Finished difference. Result has 229 places, 315 transitions, 3235 flow [2024-06-27 20:48:19,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3235, PETRI_PLACES=229, PETRI_TRANSITIONS=315} [2024-06-27 20:48:19,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 20:48:19,771 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 315 transitions, 3235 flow [2024-06-27 20:48:19,771 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) [2024-06-27 20:48:19,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:19,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:19,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:48:19,771 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)] === [2024-06-27 20:48:19,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1806627782, now seen corresponding path program 3 times [2024-06-27 20:48:19,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:19,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871741555] [2024-06-27 20:48:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:19,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:22,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:22,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871741555] [2024-06-27 20:48:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871741555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:22,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:22,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246919998] [2024-06-27 20:48:22,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:22,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:22,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:22,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 315 transitions, 3235 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) [2024-06-27 20:48:22,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:22,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:22,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:23,653 INFO L124 PetriNetUnfolderBase]: 3436/5734 cut-off events. [2024-06-27 20:48:23,653 INFO L125 PetriNetUnfolderBase]: For 324640/324655 co-relation queries the response was YES. [2024-06-27 20:48:23,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34647 conditions, 5734 events. 3436/5734 cut-off events. For 324640/324655 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37440 event pairs, 721 based on Foata normal form. 32/5762 useless extension candidates. Maximal degree in co-relation 34540. Up to 4912 conditions per place. [2024-06-27 20:48:23,712 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 64 changer transitions 0/343 dead transitions. [2024-06-27 20:48:23,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 343 transitions, 4007 flow [2024-06-27 20:48:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:48:23,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:48:23,713 INFO L175 Difference]: Start difference. First operand has 229 places, 315 transitions, 3235 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:48:23,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 343 transitions, 4007 flow [2024-06-27 20:48:24,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 343 transitions, 3815 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:24,394 INFO L231 Difference]: Finished difference. Result has 229 places, 315 transitions, 3179 flow [2024-06-27 20:48:24,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3179, PETRI_PLACES=229, PETRI_TRANSITIONS=315} [2024-06-27 20:48:24,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 20:48:24,394 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 315 transitions, 3179 flow [2024-06-27 20:48:24,394 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) [2024-06-27 20:48:24,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:24,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:24,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:48:24,395 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)] === [2024-06-27 20:48:24,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash 630523458, now seen corresponding path program 1 times [2024-06-27 20:48:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143178163] [2024-06-27 20:48:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:26,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:26,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143178163] [2024-06-27 20:48:26,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143178163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:26,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:26,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:26,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17818838] [2024-06-27 20:48:26,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:26,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:26,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:26,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:26,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 315 transitions, 3179 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) [2024-06-27 20:48:26,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:26,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:26,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:28,670 INFO L124 PetriNetUnfolderBase]: 3600/5942 cut-off events. [2024-06-27 20:48:28,670 INFO L125 PetriNetUnfolderBase]: For 341270/341279 co-relation queries the response was YES. [2024-06-27 20:48:28,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36034 conditions, 5942 events. 3600/5942 cut-off events. For 341270/341279 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38539 event pairs, 723 based on Foata normal form. 20/5956 useless extension candidates. Maximal degree in co-relation 35926. Up to 4450 conditions per place. [2024-06-27 20:48:28,737 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 179 changer transitions 0/376 dead transitions. [2024-06-27 20:48:28,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 376 transitions, 4540 flow [2024-06-27 20:48:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:48:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:48:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-27 20:48:28,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-27 20:48:28,739 INFO L175 Difference]: Start difference. First operand has 229 places, 315 transitions, 3179 flow. Second operand 11 states and 195 transitions. [2024-06-27 20:48:28,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 376 transitions, 4540 flow [2024-06-27 20:48:29,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 376 transitions, 4391 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:29,263 INFO L231 Difference]: Finished difference. Result has 234 places, 335 transitions, 3620 flow [2024-06-27 20:48:29,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3620, PETRI_PLACES=234, PETRI_TRANSITIONS=335} [2024-06-27 20:48:29,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-27 20:48:29,263 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 335 transitions, 3620 flow [2024-06-27 20:48:29,264 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) [2024-06-27 20:48:29,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:29,264 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] [2024-06-27 20:48:29,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:48:29,264 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)] === [2024-06-27 20:48:29,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:29,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1600097474, now seen corresponding path program 2 times [2024-06-27 20:48:29,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:29,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468388869] [2024-06-27 20:48:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:29,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:31,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468388869] [2024-06-27 20:48:31,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468388869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:31,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:31,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:31,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102362727] [2024-06-27 20:48:31,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:31,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:31,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:31,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:31,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 335 transitions, 3620 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) [2024-06-27 20:48:31,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:31,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:31,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:33,334 INFO L124 PetriNetUnfolderBase]: 3628/5983 cut-off events. [2024-06-27 20:48:33,334 INFO L125 PetriNetUnfolderBase]: For 325798/325803 co-relation queries the response was YES. [2024-06-27 20:48:33,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36949 conditions, 5983 events. 3628/5983 cut-off events. For 325798/325803 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 38705 event pairs, 743 based on Foata normal form. 8/5985 useless extension candidates. Maximal degree in co-relation 36839. Up to 4474 conditions per place. [2024-06-27 20:48:33,395 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 183 changer transitions 0/378 dead transitions. [2024-06-27 20:48:33,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 378 transitions, 4884 flow [2024-06-27 20:48:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:48:33,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 20:48:33,397 INFO L175 Difference]: Start difference. First operand has 234 places, 335 transitions, 3620 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:48:33,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 378 transitions, 4884 flow [2024-06-27 20:48:33,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 378 transitions, 4545 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:33,956 INFO L231 Difference]: Finished difference. Result has 237 places, 343 transitions, 3764 flow [2024-06-27 20:48:33,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3764, PETRI_PLACES=237, PETRI_TRANSITIONS=343} [2024-06-27 20:48:33,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:48:33,956 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 343 transitions, 3764 flow [2024-06-27 20:48:33,956 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) [2024-06-27 20:48:33,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:33,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:33,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:48:33,957 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)] === [2024-06-27 20:48:33,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1195799974, now seen corresponding path program 3 times [2024-06-27 20:48:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954893134] [2024-06-27 20:48:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:36,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:36,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954893134] [2024-06-27 20:48:36,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954893134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:36,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:36,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:36,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086807980] [2024-06-27 20:48:36,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:36,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:36,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:36,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:36,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 343 transitions, 3764 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) [2024-06-27 20:48:36,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:36,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:36,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:37,780 INFO L124 PetriNetUnfolderBase]: 3616/5982 cut-off events. [2024-06-27 20:48:37,780 INFO L125 PetriNetUnfolderBase]: For 314339/314344 co-relation queries the response was YES. [2024-06-27 20:48:37,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36519 conditions, 5982 events. 3616/5982 cut-off events. For 314339/314344 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 38825 event pairs, 791 based on Foata normal form. 4/5980 useless extension candidates. Maximal degree in co-relation 36408. Up to 4466 conditions per place. [2024-06-27 20:48:37,838 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 197 selfloop transitions, 167 changer transitions 0/369 dead transitions. [2024-06-27 20:48:37,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 369 transitions, 4748 flow [2024-06-27 20:48:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:48:37,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:48:37,840 INFO L175 Difference]: Start difference. First operand has 237 places, 343 transitions, 3764 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:48:37,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 369 transitions, 4748 flow [2024-06-27 20:48:38,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 369 transitions, 4361 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 20:48:38,372 INFO L231 Difference]: Finished difference. Result has 238 places, 343 transitions, 3723 flow [2024-06-27 20:48:38,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3377, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3723, PETRI_PLACES=238, PETRI_TRANSITIONS=343} [2024-06-27 20:48:38,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-27 20:48:38,373 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 343 transitions, 3723 flow [2024-06-27 20:48:38,373 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) [2024-06-27 20:48:38,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:38,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:38,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:48:38,373 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)] === [2024-06-27 20:48:38,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1921564406, now seen corresponding path program 1 times [2024-06-27 20:48:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217484331] [2024-06-27 20:48:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:41,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:41,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217484331] [2024-06-27 20:48:41,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217484331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:41,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:41,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:48:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932630728] [2024-06-27 20:48:41,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:41,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:48:41,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:41,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:48:41,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:48:41,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:41,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 343 transitions, 3723 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:41,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:41,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:41,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:43,362 INFO L124 PetriNetUnfolderBase]: 3735/6185 cut-off events. [2024-06-27 20:48:43,362 INFO L125 PetriNetUnfolderBase]: For 373726/373741 co-relation queries the response was YES. [2024-06-27 20:48:43,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38650 conditions, 6185 events. 3735/6185 cut-off events. For 373726/373741 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 40649 event pairs, 733 based on Foata normal form. 24/6205 useless extension candidates. Maximal degree in co-relation 38538. Up to 5022 conditions per place. [2024-06-27 20:48:43,427 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 61 changer transitions 0/378 dead transitions. [2024-06-27 20:48:43,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 378 transitions, 4837 flow [2024-06-27 20:48:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:48:43,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:48:43,428 INFO L175 Difference]: Start difference. First operand has 238 places, 343 transitions, 3723 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:48:43,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 378 transitions, 4837 flow [2024-06-27 20:48:43,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 378 transitions, 4470 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:48:43,954 INFO L231 Difference]: Finished difference. Result has 239 places, 347 transitions, 3638 flow [2024-06-27 20:48:43,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3638, PETRI_PLACES=239, PETRI_TRANSITIONS=347} [2024-06-27 20:48:43,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 20:48:43,954 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 347 transitions, 3638 flow [2024-06-27 20:48:43,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:48:43,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:43,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:43,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:48:43,955 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)] === [2024-06-27 20:48:43,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1256786886, now seen corresponding path program 4 times [2024-06-27 20:48:43,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:43,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95556283] [2024-06-27 20:48:43,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:43,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:46,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:46,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95556283] [2024-06-27 20:48:46,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95556283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:46,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:46,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:46,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629297084] [2024-06-27 20:48:46,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:46,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:46,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:46,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:46,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 347 transitions, 3638 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) [2024-06-27 20:48:46,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:46,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:46,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:48,195 INFO L124 PetriNetUnfolderBase]: 3781/6256 cut-off events. [2024-06-27 20:48:48,195 INFO L125 PetriNetUnfolderBase]: For 397094/397127 co-relation queries the response was YES. [2024-06-27 20:48:48,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38823 conditions, 6256 events. 3781/6256 cut-off events. For 397094/397127 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 40990 event pairs, 758 based on Foata normal form. 36/6273 useless extension candidates. Maximal degree in co-relation 38709. Up to 5351 conditions per place. [2024-06-27 20:48:48,266 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 288 selfloop transitions, 78 changer transitions 0/371 dead transitions. [2024-06-27 20:48:48,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 371 transitions, 4508 flow [2024-06-27 20:48:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:48:48,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:48:48,267 INFO L175 Difference]: Start difference. First operand has 239 places, 347 transitions, 3638 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:48:48,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 371 transitions, 4508 flow [2024-06-27 20:48:48,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 371 transitions, 4378 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 20:48:48,912 INFO L231 Difference]: Finished difference. Result has 243 places, 349 transitions, 3734 flow [2024-06-27 20:48:48,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3734, PETRI_PLACES=243, PETRI_TRANSITIONS=349} [2024-06-27 20:48:48,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-27 20:48:48,913 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 349 transitions, 3734 flow [2024-06-27 20:48:48,913 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) [2024-06-27 20:48:48,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:48,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:48,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:48:48,913 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)] === [2024-06-27 20:48:48,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1617757250, now seen corresponding path program 4 times [2024-06-27 20:48:48,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:48,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598998194] [2024-06-27 20:48:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:51,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:51,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598998194] [2024-06-27 20:48:51,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598998194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:51,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:51,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:51,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845405401] [2024-06-27 20:48:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:51,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:51,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 349 transitions, 3734 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) [2024-06-27 20:48:51,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:51,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:51,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:53,103 INFO L124 PetriNetUnfolderBase]: 3853/6314 cut-off events. [2024-06-27 20:48:53,103 INFO L125 PetriNetUnfolderBase]: For 388845/388849 co-relation queries the response was YES. [2024-06-27 20:48:53,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40073 conditions, 6314 events. 3853/6314 cut-off events. For 388845/388849 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 41129 event pairs, 841 based on Foata normal form. 10/6296 useless extension candidates. Maximal degree in co-relation 39957. Up to 5259 conditions per place. [2024-06-27 20:48:53,173 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 259 selfloop transitions, 138 changer transitions 0/402 dead transitions. [2024-06-27 20:48:53,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 402 transitions, 5180 flow [2024-06-27 20:48:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:48:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:48:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 20:48:53,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:48:53,174 INFO L175 Difference]: Start difference. First operand has 243 places, 349 transitions, 3734 flow. Second operand 10 states and 175 transitions. [2024-06-27 20:48:53,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 402 transitions, 5180 flow [2024-06-27 20:48:53,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 402 transitions, 4982 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:53,944 INFO L231 Difference]: Finished difference. Result has 247 places, 368 transitions, 4093 flow [2024-06-27 20:48:53,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4093, PETRI_PLACES=247, PETRI_TRANSITIONS=368} [2024-06-27 20:48:53,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 20:48:53,945 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 368 transitions, 4093 flow [2024-06-27 20:48:53,945 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) [2024-06-27 20:48:53,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:53,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:48:53,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:48:53,945 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)] === [2024-06-27 20:48:53,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1247247466, now seen corresponding path program 5 times [2024-06-27 20:48:53,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:53,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047365705] [2024-06-27 20:48:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:53,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:48:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:48:56,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:48:56,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047365705] [2024-06-27 20:48:56,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047365705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:48:56,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:48:56,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:48:56,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892307388] [2024-06-27 20:48:56,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:48:56,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:48:56,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:48:56,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:48:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:48:56,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:48:56,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 368 transitions, 4093 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) [2024-06-27 20:48:56,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:48:56,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:48:56,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:48:58,003 INFO L124 PetriNetUnfolderBase]: 3841/6308 cut-off events. [2024-06-27 20:48:58,003 INFO L125 PetriNetUnfolderBase]: For 375485/375487 co-relation queries the response was YES. [2024-06-27 20:48:58,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39762 conditions, 6308 events. 3841/6308 cut-off events. For 375485/375487 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41110 event pairs, 857 based on Foata normal form. 4/6288 useless extension candidates. Maximal degree in co-relation 39645. Up to 5249 conditions per place. [2024-06-27 20:48:58,070 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 137 changer transitions 0/394 dead transitions. [2024-06-27 20:48:58,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 394 transitions, 5105 flow [2024-06-27 20:48:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:48:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:48:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:48:58,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:48:58,072 INFO L175 Difference]: Start difference. First operand has 247 places, 368 transitions, 4093 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:48:58,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 394 transitions, 5105 flow [2024-06-27 20:48:58,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 394 transitions, 4763 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 20:48:58,861 INFO L231 Difference]: Finished difference. Result has 249 places, 368 transitions, 4033 flow [2024-06-27 20:48:58,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3751, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4033, PETRI_PLACES=249, PETRI_TRANSITIONS=368} [2024-06-27 20:48:58,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-27 20:48:58,862 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 368 transitions, 4033 flow [2024-06-27 20:48:58,862 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) [2024-06-27 20:48:58,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:48:58,862 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] [2024-06-27 20:48:58,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:48:58,862 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)] === [2024-06-27 20:48:58,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:48:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash 252547774, now seen corresponding path program 6 times [2024-06-27 20:48:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:48:58,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154848872] [2024-06-27 20:48:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:48:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:48:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:01,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:01,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154848872] [2024-06-27 20:49:01,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154848872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:01,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:01,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:01,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749626479] [2024-06-27 20:49:01,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:01,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:01,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:01,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:01,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 368 transitions, 4033 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) [2024-06-27 20:49:01,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:01,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:01,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:03,014 INFO L124 PetriNetUnfolderBase]: 3817/6276 cut-off events. [2024-06-27 20:49:03,014 INFO L125 PetriNetUnfolderBase]: For 366512/366520 co-relation queries the response was YES. [2024-06-27 20:49:03,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38497 conditions, 6276 events. 3817/6276 cut-off events. For 366512/366520 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 40899 event pairs, 833 based on Foata normal form. 14/6266 useless extension candidates. Maximal degree in co-relation 38379. Up to 5281 conditions per place. [2024-06-27 20:49:03,074 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 268 selfloop transitions, 124 changer transitions 0/397 dead transitions. [2024-06-27 20:49:03,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 397 transitions, 4919 flow [2024-06-27 20:49:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:49:03,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:49:03,075 INFO L175 Difference]: Start difference. First operand has 249 places, 368 transitions, 4033 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:49:03,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 397 transitions, 4919 flow [2024-06-27 20:49:03,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 397 transitions, 4609 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:03,855 INFO L231 Difference]: Finished difference. Result has 250 places, 368 transitions, 3986 flow [2024-06-27 20:49:03,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3986, PETRI_PLACES=250, PETRI_TRANSITIONS=368} [2024-06-27 20:49:03,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 20:49:03,856 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 368 transitions, 3986 flow [2024-06-27 20:49:03,856 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) [2024-06-27 20:49:03,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:03,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:03,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:49:03,857 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)] === [2024-06-27 20:49:03,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:03,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1007115886, now seen corresponding path program 7 times [2024-06-27 20:49:03,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:03,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504246181] [2024-06-27 20:49:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:03,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:06,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:06,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504246181] [2024-06-27 20:49:06,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504246181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:06,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:06,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:06,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066137688] [2024-06-27 20:49:06,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:06,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:06,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:06,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:06,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:06,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 368 transitions, 3986 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) [2024-06-27 20:49:06,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:06,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:06,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:08,253 INFO L124 PetriNetUnfolderBase]: 3843/6325 cut-off events. [2024-06-27 20:49:08,253 INFO L125 PetriNetUnfolderBase]: For 364656/364664 co-relation queries the response was YES. [2024-06-27 20:49:08,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38817 conditions, 6325 events. 3843/6325 cut-off events. For 364656/364664 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 41475 event pairs, 746 based on Foata normal form. 8/6313 useless extension candidates. Maximal degree in co-relation 38698. Up to 4991 conditions per place. [2024-06-27 20:49:08,315 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 176 changer transitions 0/431 dead transitions. [2024-06-27 20:49:08,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 431 transitions, 5634 flow [2024-06-27 20:49:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:08,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:49:08,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:49:08,317 INFO L175 Difference]: Start difference. First operand has 250 places, 368 transitions, 3986 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:49:08,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 431 transitions, 5634 flow [2024-06-27 20:49:08,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 431 transitions, 5354 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:08,966 INFO L231 Difference]: Finished difference. Result has 253 places, 398 transitions, 4607 flow [2024-06-27 20:49:08,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3726, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4607, PETRI_PLACES=253, PETRI_TRANSITIONS=398} [2024-06-27 20:49:08,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 20:49:08,967 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 398 transitions, 4607 flow [2024-06-27 20:49:08,967 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) [2024-06-27 20:49:08,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:08,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:08,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:49:08,967 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)] === [2024-06-27 20:49:08,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash 408818464, now seen corresponding path program 8 times [2024-06-27 20:49:08,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:08,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40054779] [2024-06-27 20:49:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:11,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:11,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40054779] [2024-06-27 20:49:11,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40054779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:11,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:11,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:11,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313607597] [2024-06-27 20:49:11,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:11,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:11,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:11,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:11,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:11,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 398 transitions, 4607 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) [2024-06-27 20:49:11,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:11,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:11,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:13,393 INFO L124 PetriNetUnfolderBase]: 3869/6364 cut-off events. [2024-06-27 20:49:13,393 INFO L125 PetriNetUnfolderBase]: For 385130/385132 co-relation queries the response was YES. [2024-06-27 20:49:13,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40802 conditions, 6364 events. 3869/6364 cut-off events. For 385130/385132 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 41689 event pairs, 754 based on Foata normal form. 2/6346 useless extension candidates. Maximal degree in co-relation 40680. Up to 5006 conditions per place. [2024-06-27 20:49:13,470 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 179 changer transitions 0/433 dead transitions. [2024-06-27 20:49:13,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 433 transitions, 6179 flow [2024-06-27 20:49:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:49:13,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:49:13,472 INFO L175 Difference]: Start difference. First operand has 253 places, 398 transitions, 4607 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:49:13,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 433 transitions, 6179 flow [2024-06-27 20:49:14,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 433 transitions, 5935 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:14,493 INFO L231 Difference]: Finished difference. Result has 257 places, 404 transitions, 4893 flow [2024-06-27 20:49:14,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4391, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4893, PETRI_PLACES=257, PETRI_TRANSITIONS=404} [2024-06-27 20:49:14,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 20:49:14,494 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 404 transitions, 4893 flow [2024-06-27 20:49:14,494 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) [2024-06-27 20:49:14,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:14,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:14,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:49:14,494 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)] === [2024-06-27 20:49:14,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash -863462506, now seen corresponding path program 9 times [2024-06-27 20:49:14,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:14,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200557716] [2024-06-27 20:49:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:14,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:16,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:16,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200557716] [2024-06-27 20:49:16,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200557716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:16,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:16,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572053329] [2024-06-27 20:49:16,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:16,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:16,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:16,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 404 transitions, 4893 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) [2024-06-27 20:49:16,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:16,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:16,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:18,866 INFO L124 PetriNetUnfolderBase]: 3863/6356 cut-off events. [2024-06-27 20:49:18,866 INFO L125 PetriNetUnfolderBase]: For 384401/384403 co-relation queries the response was YES. [2024-06-27 20:49:18,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40693 conditions, 6356 events. 3863/6356 cut-off events. For 384401/384403 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 41603 event pairs, 768 based on Foata normal form. 2/6338 useless extension candidates. Maximal degree in co-relation 40570. Up to 5003 conditions per place. [2024-06-27 20:49:18,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 177 changer transitions 0/432 dead transitions. [2024-06-27 20:49:18,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 432 transitions, 6147 flow [2024-06-27 20:49:18,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:49:18,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:49:18,938 INFO L175 Difference]: Start difference. First operand has 257 places, 404 transitions, 4893 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:49:18,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 432 transitions, 6147 flow [2024-06-27 20:49:19,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 432 transitions, 5797 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:19,861 INFO L231 Difference]: Finished difference. Result has 261 places, 404 transitions, 4903 flow [2024-06-27 20:49:19,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4903, PETRI_PLACES=261, PETRI_TRANSITIONS=404} [2024-06-27 20:49:19,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 20:49:19,861 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 404 transitions, 4903 flow [2024-06-27 20:49:19,861 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) [2024-06-27 20:49:19,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:19,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:19,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:49:19,862 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)] === [2024-06-27 20:49:19,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1865204832, now seen corresponding path program 10 times [2024-06-27 20:49:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:19,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473405573] [2024-06-27 20:49:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:19,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:22,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:22,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473405573] [2024-06-27 20:49:22,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473405573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:22,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:22,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:22,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247017972] [2024-06-27 20:49:22,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:22,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:22,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:22,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:22,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 404 transitions, 4903 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) [2024-06-27 20:49:22,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:22,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:22,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:24,247 INFO L124 PetriNetUnfolderBase]: 3889/6416 cut-off events. [2024-06-27 20:49:24,247 INFO L125 PetriNetUnfolderBase]: For 401141/401174 co-relation queries the response was YES. [2024-06-27 20:49:24,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41266 conditions, 6416 events. 3889/6416 cut-off events. For 401141/401174 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42043 event pairs, 814 based on Foata normal form. 4/6399 useless extension candidates. Maximal degree in co-relation 41142. Up to 5018 conditions per place. [2024-06-27 20:49:24,317 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 170 changer transitions 0/434 dead transitions. [2024-06-27 20:49:24,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 434 transitions, 6472 flow [2024-06-27 20:49:24,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:49:24,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:49:24,318 INFO L175 Difference]: Start difference. First operand has 261 places, 404 transitions, 4903 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:49:24,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 434 transitions, 6472 flow [2024-06-27 20:49:25,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 434 transitions, 6061 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:25,181 INFO L231 Difference]: Finished difference. Result has 263 places, 413 transitions, 5083 flow [2024-06-27 20:49:25,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4506, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5083, PETRI_PLACES=263, PETRI_TRANSITIONS=413} [2024-06-27 20:49:25,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-27 20:49:25,182 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 413 transitions, 5083 flow [2024-06-27 20:49:25,182 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) [2024-06-27 20:49:25,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:25,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:25,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:49:25,182 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)] === [2024-06-27 20:49:25,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1157607536, now seen corresponding path program 11 times [2024-06-27 20:49:25,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:25,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157791131] [2024-06-27 20:49:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:25,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:27,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:27,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157791131] [2024-06-27 20:49:27,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157791131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:27,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:27,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:27,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576519662] [2024-06-27 20:49:27,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:27,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:27,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:27,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:27,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:27,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:27,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 413 transitions, 5083 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) [2024-06-27 20:49:27,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:27,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:27,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:29,345 INFO L124 PetriNetUnfolderBase]: 3883/6420 cut-off events. [2024-06-27 20:49:29,345 INFO L125 PetriNetUnfolderBase]: For 403465/403498 co-relation queries the response was YES. [2024-06-27 20:49:29,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41238 conditions, 6420 events. 3883/6420 cut-off events. For 403465/403498 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42260 event pairs, 820 based on Foata normal form. 4/6403 useless extension candidates. Maximal degree in co-relation 41112. Up to 5015 conditions per place. [2024-06-27 20:49:29,424 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 173 changer transitions 0/433 dead transitions. [2024-06-27 20:49:29,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 433 transitions, 6307 flow [2024-06-27 20:49:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:49:29,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:49:29,426 INFO L175 Difference]: Start difference. First operand has 263 places, 413 transitions, 5083 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:49:29,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 433 transitions, 6307 flow [2024-06-27 20:49:30,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 433 transitions, 5960 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:30,552 INFO L231 Difference]: Finished difference. Result has 267 places, 413 transitions, 5088 flow [2024-06-27 20:49:30,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4736, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5088, PETRI_PLACES=267, PETRI_TRANSITIONS=413} [2024-06-27 20:49:30,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-27 20:49:30,553 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 413 transitions, 5088 flow [2024-06-27 20:49:30,553 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) [2024-06-27 20:49:30,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:30,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:30,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:49:30,554 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)] === [2024-06-27 20:49:30,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1256910018, now seen corresponding path program 12 times [2024-06-27 20:49:30,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:30,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673579280] [2024-06-27 20:49:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:30,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:33,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:33,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673579280] [2024-06-27 20:49:33,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673579280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:33,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:33,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:49:33,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935681654] [2024-06-27 20:49:33,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:33,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:49:33,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:49:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:49:33,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:33,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 413 transitions, 5088 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) [2024-06-27 20:49:33,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:33,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:33,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:35,091 INFO L124 PetriNetUnfolderBase]: 3871/6392 cut-off events. [2024-06-27 20:49:35,092 INFO L125 PetriNetUnfolderBase]: For 405661/405694 co-relation queries the response was YES. [2024-06-27 20:49:35,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40635 conditions, 6392 events. 3871/6392 cut-off events. For 405661/405694 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 41950 event pairs, 817 based on Foata normal form. 6/6377 useless extension candidates. Maximal degree in co-relation 40508. Up to 5007 conditions per place. [2024-06-27 20:49:35,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 268 selfloop transitions, 160 changer transitions 0/433 dead transitions. [2024-06-27 20:49:35,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 433 transitions, 6316 flow [2024-06-27 20:49:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:49:35,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:49:35,175 INFO L175 Difference]: Start difference. First operand has 267 places, 413 transitions, 5088 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:49:35,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 433 transitions, 6316 flow [2024-06-27 20:49:36,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 433 transitions, 5880 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:36,492 INFO L231 Difference]: Finished difference. Result has 268 places, 413 transitions, 4979 flow [2024-06-27 20:49:36,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4979, PETRI_PLACES=268, PETRI_TRANSITIONS=413} [2024-06-27 20:49:36,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 20:49:36,493 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 413 transitions, 4979 flow [2024-06-27 20:49:36,493 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) [2024-06-27 20:49:36,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:36,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:36,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:49:36,493 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)] === [2024-06-27 20:49:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:36,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1269698820, now seen corresponding path program 2 times [2024-06-27 20:49:36,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:36,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174353247] [2024-06-27 20:49:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:39,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:39,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174353247] [2024-06-27 20:49:39,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174353247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:39,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:39,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:39,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228456748] [2024-06-27 20:49:39,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:39,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:39,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:39,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:39,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:39,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 413 transitions, 4979 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:39,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:39,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:39,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:41,301 INFO L124 PetriNetUnfolderBase]: 3990/6579 cut-off events. [2024-06-27 20:49:41,302 INFO L125 PetriNetUnfolderBase]: For 484151/484184 co-relation queries the response was YES. [2024-06-27 20:49:41,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43028 conditions, 6579 events. 3990/6579 cut-off events. For 484151/484184 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43284 event pairs, 759 based on Foata normal form. 28/6588 useless extension candidates. Maximal degree in co-relation 42900. Up to 5487 conditions per place. [2024-06-27 20:49:41,383 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 77 changer transitions 0/442 dead transitions. [2024-06-27 20:49:41,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 442 transitions, 6241 flow [2024-06-27 20:49:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:49:41,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:49:41,384 INFO L175 Difference]: Start difference. First operand has 268 places, 413 transitions, 4979 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:49:41,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 442 transitions, 6241 flow [2024-06-27 20:49:42,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 442 transitions, 5945 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 20:49:42,422 INFO L231 Difference]: Finished difference. Result has 270 places, 417 transitions, 4991 flow [2024-06-27 20:49:42,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4991, PETRI_PLACES=270, PETRI_TRANSITIONS=417} [2024-06-27 20:49:42,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 20:49:42,422 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 417 transitions, 4991 flow [2024-06-27 20:49:42,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:42,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:42,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:42,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:49:42,423 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)] === [2024-06-27 20:49:42,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:42,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1700015400, now seen corresponding path program 3 times [2024-06-27 20:49:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:42,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322734137] [2024-06-27 20:49:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:42,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:45,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:45,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322734137] [2024-06-27 20:49:45,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322734137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:45,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:45,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:45,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170883740] [2024-06-27 20:49:45,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:45,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:45,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:45,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:45,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:45,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 417 transitions, 4991 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:45,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:45,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:45,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:47,334 INFO L124 PetriNetUnfolderBase]: 4024/6639 cut-off events. [2024-06-27 20:49:47,334 INFO L125 PetriNetUnfolderBase]: For 487408/487441 co-relation queries the response was YES. [2024-06-27 20:49:47,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43230 conditions, 6639 events. 4024/6639 cut-off events. For 487408/487441 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43666 event pairs, 765 based on Foata normal form. 28/6648 useless extension candidates. Maximal degree in co-relation 43101. Up to 4963 conditions per place. [2024-06-27 20:49:47,413 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 356 selfloop transitions, 87 changer transitions 0/448 dead transitions. [2024-06-27 20:49:47,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 448 transitions, 6415 flow [2024-06-27 20:49:47,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:47,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:49:47,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:49:47,414 INFO L175 Difference]: Start difference. First operand has 270 places, 417 transitions, 4991 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:49:47,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 448 transitions, 6415 flow [2024-06-27 20:49:48,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 448 transitions, 6257 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:49:48,603 INFO L231 Difference]: Finished difference. Result has 275 places, 420 transitions, 5125 flow [2024-06-27 20:49:48,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5125, PETRI_PLACES=275, PETRI_TRANSITIONS=420} [2024-06-27 20:49:48,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 20:49:48,604 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 420 transitions, 5125 flow [2024-06-27 20:49:48,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:48,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:48,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:48,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:49:48,604 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)] === [2024-06-27 20:49:48,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2088426654, now seen corresponding path program 1 times [2024-06-27 20:49:48,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:48,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633344144] [2024-06-27 20:49:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:48,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:51,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:51,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633344144] [2024-06-27 20:49:51,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633344144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:51,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:51,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947810044] [2024-06-27 20:49:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:51,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:51,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:51,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 420 transitions, 5125 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:51,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:51,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:51,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:53,791 INFO L124 PetriNetUnfolderBase]: 4032/6649 cut-off events. [2024-06-27 20:49:53,791 INFO L125 PetriNetUnfolderBase]: For 463436/463438 co-relation queries the response was YES. [2024-06-27 20:49:53,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43553 conditions, 6649 events. 4032/6649 cut-off events. For 463436/463438 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 43816 event pairs, 937 based on Foata normal form. 2/6648 useless extension candidates. Maximal degree in co-relation 43421. Up to 6179 conditions per place. [2024-06-27 20:49:53,876 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 414 selfloop transitions, 29 changer transitions 0/448 dead transitions. [2024-06-27 20:49:53,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 448 transitions, 6119 flow [2024-06-27 20:49:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:49:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:49:53,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:49:53,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:49:53,877 INFO L175 Difference]: Start difference. First operand has 275 places, 420 transitions, 5125 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:49:53,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 448 transitions, 6119 flow [2024-06-27 20:49:54,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 448 transitions, 5831 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:49:54,756 INFO L231 Difference]: Finished difference. Result has 277 places, 422 transitions, 4944 flow [2024-06-27 20:49:54,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4837, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4944, PETRI_PLACES=277, PETRI_TRANSITIONS=422} [2024-06-27 20:49:54,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 20:49:54,757 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 422 transitions, 4944 flow [2024-06-27 20:49:54,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:54,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:49:54,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:49:54,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:49:54,757 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)] === [2024-06-27 20:49:54,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:49:54,758 INFO L85 PathProgramCache]: Analyzing trace with hash 409035154, now seen corresponding path program 2 times [2024-06-27 20:49:54,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:49:54,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663775894] [2024-06-27 20:49:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:49:54,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:49:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:49:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:49:57,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:49:57,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663775894] [2024-06-27 20:49:57,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663775894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:49:57,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:49:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:49:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443215594] [2024-06-27 20:49:57,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:49:57,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:49:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:49:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:49:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:49:57,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:49:57,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 422 transitions, 4944 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:49:57,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:49:57,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:49:57,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:49:59,977 INFO L124 PetriNetUnfolderBase]: 4040/6661 cut-off events. [2024-06-27 20:49:59,978 INFO L125 PetriNetUnfolderBase]: For 473903/473905 co-relation queries the response was YES. [2024-06-27 20:50:00,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42597 conditions, 6661 events. 4040/6661 cut-off events. For 473903/473905 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 43854 event pairs, 939 based on Foata normal form. 2/6660 useless extension candidates. Maximal degree in co-relation 42465. Up to 6191 conditions per place. [2024-06-27 20:50:00,049 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 413 selfloop transitions, 28 changer transitions 0/446 dead transitions. [2024-06-27 20:50:00,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 446 transitions, 5926 flow [2024-06-27 20:50:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:50:00,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:50:00,050 INFO L175 Difference]: Start difference. First operand has 277 places, 422 transitions, 4944 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:50:00,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 446 transitions, 5926 flow [2024-06-27 20:50:01,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 446 transitions, 5835 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:01,286 INFO L231 Difference]: Finished difference. Result has 279 places, 424 transitions, 4962 flow [2024-06-27 20:50:01,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4962, PETRI_PLACES=279, PETRI_TRANSITIONS=424} [2024-06-27 20:50:01,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 20:50:01,287 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 424 transitions, 4962 flow [2024-06-27 20:50:01,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:01,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:01,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:01,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:50:01,288 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)] === [2024-06-27 20:50:01,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 843179118, now seen corresponding path program 3 times [2024-06-27 20:50:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:01,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131416172] [2024-06-27 20:50:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:01,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:04,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:04,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131416172] [2024-06-27 20:50:04,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131416172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:04,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:04,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:04,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841604764] [2024-06-27 20:50:04,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:04,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:04,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:04,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:04,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:04,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 424 transitions, 4962 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:04,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:04,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:04,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:06,340 INFO L124 PetriNetUnfolderBase]: 4048/6673 cut-off events. [2024-06-27 20:50:06,340 INFO L125 PetriNetUnfolderBase]: For 485990/485992 co-relation queries the response was YES. [2024-06-27 20:50:06,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42936 conditions, 6673 events. 4048/6673 cut-off events. For 485990/485992 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 43920 event pairs, 937 based on Foata normal form. 2/6672 useless extension candidates. Maximal degree in co-relation 42803. Up to 6183 conditions per place. [2024-06-27 20:50:06,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 410 selfloop transitions, 33 changer transitions 0/448 dead transitions. [2024-06-27 20:50:06,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 448 transitions, 5952 flow [2024-06-27 20:50:06,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:50:06,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 20:50:06,415 INFO L175 Difference]: Start difference. First operand has 279 places, 424 transitions, 4962 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:50:06,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 448 transitions, 5952 flow [2024-06-27 20:50:07,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 448 transitions, 5859 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:07,511 INFO L231 Difference]: Finished difference. Result has 281 places, 426 transitions, 4992 flow [2024-06-27 20:50:07,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4869, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4992, PETRI_PLACES=281, PETRI_TRANSITIONS=426} [2024-06-27 20:50:07,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 20:50:07,512 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 426 transitions, 4992 flow [2024-06-27 20:50:07,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:07,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:07,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:07,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:50:07,512 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)] === [2024-06-27 20:50:07,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2122159182, now seen corresponding path program 4 times [2024-06-27 20:50:07,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:07,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605677524] [2024-06-27 20:50:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:07,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:10,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:10,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605677524] [2024-06-27 20:50:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605677524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:10,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:10,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:10,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914803485] [2024-06-27 20:50:10,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:10,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:10,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:10,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:10,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:10,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:10,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 426 transitions, 4992 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:10,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:10,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:10,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:12,861 INFO L124 PetriNetUnfolderBase]: 4056/6691 cut-off events. [2024-06-27 20:50:12,861 INFO L125 PetriNetUnfolderBase]: For 497890/497895 co-relation queries the response was YES. [2024-06-27 20:50:12,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43309 conditions, 6691 events. 4056/6691 cut-off events. For 497890/497895 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 44150 event pairs, 940 based on Foata normal form. 4/6690 useless extension candidates. Maximal degree in co-relation 43175. Up to 6215 conditions per place. [2024-06-27 20:50:12,931 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 412 selfloop transitions, 28 changer transitions 0/445 dead transitions. [2024-06-27 20:50:12,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 445 transitions, 5966 flow [2024-06-27 20:50:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:50:12,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:50:12,932 INFO L175 Difference]: Start difference. First operand has 281 places, 426 transitions, 4992 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:50:12,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 445 transitions, 5966 flow [2024-06-27 20:50:13,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 445 transitions, 5859 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:13,990 INFO L231 Difference]: Finished difference. Result has 283 places, 428 transitions, 5002 flow [2024-06-27 20:50:13,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5002, PETRI_PLACES=283, PETRI_TRANSITIONS=428} [2024-06-27 20:50:13,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 20:50:13,991 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 428 transitions, 5002 flow [2024-06-27 20:50:13,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:13,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:13,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:13,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:50:13,991 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)] === [2024-06-27 20:50:13,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1441652658, now seen corresponding path program 5 times [2024-06-27 20:50:13,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:13,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697596206] [2024-06-27 20:50:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:13,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:17,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:17,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697596206] [2024-06-27 20:50:17,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697596206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:17,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:17,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:17,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281197229] [2024-06-27 20:50:17,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:17,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:17,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:17,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 428 transitions, 5002 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:17,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:17,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:17,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:19,247 INFO L124 PetriNetUnfolderBase]: 4064/6703 cut-off events. [2024-06-27 20:50:19,248 INFO L125 PetriNetUnfolderBase]: For 510152/510157 co-relation queries the response was YES. [2024-06-27 20:50:19,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43634 conditions, 6703 events. 4064/6703 cut-off events. For 510152/510157 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44169 event pairs, 940 based on Foata normal form. 4/6702 useless extension candidates. Maximal degree in co-relation 43499. Up to 6213 conditions per place. [2024-06-27 20:50:19,334 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 411 selfloop transitions, 31 changer transitions 0/447 dead transitions. [2024-06-27 20:50:19,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 447 transitions, 5984 flow [2024-06-27 20:50:19,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:50:19,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 20:50:19,335 INFO L175 Difference]: Start difference. First operand has 283 places, 428 transitions, 5002 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:50:19,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 447 transitions, 5984 flow [2024-06-27 20:50:20,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 447 transitions, 5883 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:20,778 INFO L231 Difference]: Finished difference. Result has 285 places, 430 transitions, 5028 flow [2024-06-27 20:50:20,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4901, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5028, PETRI_PLACES=285, PETRI_TRANSITIONS=430} [2024-06-27 20:50:20,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 20:50:20,779 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 430 transitions, 5028 flow [2024-06-27 20:50:20,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:20,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:20,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:20,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:50:20,779 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)] === [2024-06-27 20:50:20,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1700200098, now seen corresponding path program 6 times [2024-06-27 20:50:20,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:20,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471453365] [2024-06-27 20:50:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:24,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:24,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471453365] [2024-06-27 20:50:24,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471453365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:24,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:24,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:24,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626199489] [2024-06-27 20:50:24,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:24,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:24,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:24,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:24,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 430 transitions, 5028 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:24,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:24,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:24,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:25,714 INFO L124 PetriNetUnfolderBase]: 4059/6694 cut-off events. [2024-06-27 20:50:25,714 INFO L125 PetriNetUnfolderBase]: For 514483/514488 co-relation queries the response was YES. [2024-06-27 20:50:25,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43609 conditions, 6694 events. 4059/6694 cut-off events. For 514483/514488 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44221 event pairs, 912 based on Foata normal form. 4/6693 useless extension candidates. Maximal degree in co-relation 43473. Up to 6158 conditions per place. [2024-06-27 20:50:25,797 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 402 selfloop transitions, 42 changer transitions 0/449 dead transitions. [2024-06-27 20:50:25,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 449 transitions, 6018 flow [2024-06-27 20:50:25,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:50:25,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:50:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:50:25,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:50:25,798 INFO L175 Difference]: Start difference. First operand has 285 places, 430 transitions, 5028 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:50:25,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 449 transitions, 6018 flow [2024-06-27 20:50:27,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 449 transitions, 5907 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:27,111 INFO L231 Difference]: Finished difference. Result has 287 places, 432 transitions, 5070 flow [2024-06-27 20:50:27,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5070, PETRI_PLACES=287, PETRI_TRANSITIONS=432} [2024-06-27 20:50:27,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 20:50:27,112 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 432 transitions, 5070 flow [2024-06-27 20:50:27,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:27,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:27,112 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] [2024-06-27 20:50:27,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:50:27,112 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)] === [2024-06-27 20:50:27,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1946916659, now seen corresponding path program 1 times [2024-06-27 20:50:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:27,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039726056] [2024-06-27 20:50:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:29,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:29,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039726056] [2024-06-27 20:50:29,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039726056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:29,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:29,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:29,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892879291] [2024-06-27 20:50:29,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:29,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:29,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:29,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:29,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 432 transitions, 5070 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:29,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:29,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:29,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:31,614 INFO L124 PetriNetUnfolderBase]: 4131/6805 cut-off events. [2024-06-27 20:50:31,614 INFO L125 PetriNetUnfolderBase]: For 566370/566379 co-relation queries the response was YES. [2024-06-27 20:50:31,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44769 conditions, 6805 events. 4131/6805 cut-off events. For 566370/566379 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 44946 event pairs, 856 based on Foata normal form. 14/6813 useless extension candidates. Maximal degree in co-relation 44632. Up to 5191 conditions per place. [2024-06-27 20:50:31,835 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 240 selfloop transitions, 248 changer transitions 0/493 dead transitions. [2024-06-27 20:50:31,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 493 transitions, 6764 flow [2024-06-27 20:50:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:50:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:50:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-27 20:50:31,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-27 20:50:31,837 INFO L175 Difference]: Start difference. First operand has 287 places, 432 transitions, 5070 flow. Second operand 11 states and 200 transitions. [2024-06-27 20:50:31,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 493 transitions, 6764 flow [2024-06-27 20:50:33,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 493 transitions, 6627 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:33,172 INFO L231 Difference]: Finished difference. Result has 292 places, 450 transitions, 5687 flow [2024-06-27 20:50:33,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4933, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5687, PETRI_PLACES=292, PETRI_TRANSITIONS=450} [2024-06-27 20:50:33,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-27 20:50:33,172 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 450 transitions, 5687 flow [2024-06-27 20:50:33,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:33,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:33,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:50:33,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:50:33,173 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:33,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1946766929, now seen corresponding path program 2 times [2024-06-27 20:50:33,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:33,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040493406] [2024-06-27 20:50:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:33,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:35,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:35,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040493406] [2024-06-27 20:50:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040493406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:35,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:35,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:50:35,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548915015] [2024-06-27 20:50:35,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:35,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:50:35,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:35,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:50:35,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:50:35,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:35,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 450 transitions, 5687 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:35,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:35,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:35,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:37,591 INFO L124 PetriNetUnfolderBase]: 4215/6937 cut-off events. [2024-06-27 20:50:37,591 INFO L125 PetriNetUnfolderBase]: For 597675/597684 co-relation queries the response was YES. [2024-06-27 20:50:37,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47328 conditions, 6937 events. 4215/6937 cut-off events. For 597675/597684 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 45871 event pairs, 856 based on Foata normal form. 10/6941 useless extension candidates. Maximal degree in co-relation 47190. Up to 5271 conditions per place. [2024-06-27 20:50:37,699 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 236 selfloop transitions, 264 changer transitions 0/505 dead transitions. [2024-06-27 20:50:37,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 505 transitions, 7425 flow [2024-06-27 20:50:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:50:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:50:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:50:37,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:50:37,701 INFO L175 Difference]: Start difference. First operand has 292 places, 450 transitions, 5687 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:50:37,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 505 transitions, 7425 flow [2024-06-27 20:50:39,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 505 transitions, 6756 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 20:50:39,210 INFO L231 Difference]: Finished difference. Result has 294 places, 468 transitions, 5831 flow [2024-06-27 20:50:39,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5086, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5831, PETRI_PLACES=294, PETRI_TRANSITIONS=468} [2024-06-27 20:50:39,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-27 20:50:39,210 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 468 transitions, 5831 flow [2024-06-27 20:50:39,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:39,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:39,210 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] [2024-06-27 20:50:39,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:50:39,211 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:39,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1356822679, now seen corresponding path program 3 times [2024-06-27 20:50:39,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:39,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238283886] [2024-06-27 20:50:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:39,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:41,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:41,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238283886] [2024-06-27 20:50:41,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238283886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:41,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:41,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:41,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964758492] [2024-06-27 20:50:41,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:41,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:41,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:41,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 468 transitions, 5831 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:41,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:41,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:41,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:44,568 INFO L124 PetriNetUnfolderBase]: 4319/7075 cut-off events. [2024-06-27 20:50:44,568 INFO L125 PetriNetUnfolderBase]: For 659241/659250 co-relation queries the response was YES. [2024-06-27 20:50:44,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48849 conditions, 7075 events. 4319/7075 cut-off events. For 659241/659250 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 46735 event pairs, 857 based on Foata normal form. 12/7081 useless extension candidates. Maximal degree in co-relation 48710. Up to 5371 conditions per place. [2024-06-27 20:50:44,646 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 251 selfloop transitions, 283 changer transitions 0/539 dead transitions. [2024-06-27 20:50:44,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 539 transitions, 7719 flow [2024-06-27 20:50:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 20:50:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 20:50:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2024-06-27 20:50:44,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139194139194139 [2024-06-27 20:50:44,647 INFO L175 Difference]: Start difference. First operand has 294 places, 468 transitions, 5831 flow. Second operand 13 states and 226 transitions. [2024-06-27 20:50:44,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 539 transitions, 7719 flow [2024-06-27 20:50:46,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 539 transitions, 7264 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:50:46,145 INFO L231 Difference]: Finished difference. Result has 301 places, 492 transitions, 6284 flow [2024-06-27 20:50:46,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6284, PETRI_PLACES=301, PETRI_TRANSITIONS=492} [2024-06-27 20:50:46,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-27 20:50:46,146 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 492 transitions, 6284 flow [2024-06-27 20:50:46,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:46,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:46,146 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] [2024-06-27 20:50:46,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:50:46,146 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:46,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:46,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1729902434, now seen corresponding path program 1 times [2024-06-27 20:50:46,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:46,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045619107] [2024-06-27 20:50:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:46,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:49,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:49,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045619107] [2024-06-27 20:50:49,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045619107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:49,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:49,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584630018] [2024-06-27 20:50:49,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:49,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:49,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:49,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:49,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:49,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:49,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 492 transitions, 6284 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:49,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:49,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:49,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:51,901 INFO L124 PetriNetUnfolderBase]: 4403/7202 cut-off events. [2024-06-27 20:50:51,902 INFO L125 PetriNetUnfolderBase]: For 692160/692169 co-relation queries the response was YES. [2024-06-27 20:50:51,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50783 conditions, 7202 events. 4403/7202 cut-off events. For 692160/692169 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 47666 event pairs, 879 based on Foata normal form. 8/7204 useless extension candidates. Maximal degree in co-relation 50643. Up to 5275 conditions per place. [2024-06-27 20:50:51,982 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 271 selfloop transitions, 269 changer transitions 0/545 dead transitions. [2024-06-27 20:50:51,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 545 transitions, 8090 flow [2024-06-27 20:50:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:50:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:50:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-06-27 20:50:51,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:50:51,984 INFO L175 Difference]: Start difference. First operand has 301 places, 492 transitions, 6284 flow. Second operand 12 states and 210 transitions. [2024-06-27 20:50:51,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 545 transitions, 8090 flow [2024-06-27 20:50:53,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 545 transitions, 7636 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 20:50:53,660 INFO L231 Difference]: Finished difference. Result has 305 places, 503 transitions, 6613 flow [2024-06-27 20:50:53,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5830, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6613, PETRI_PLACES=305, PETRI_TRANSITIONS=503} [2024-06-27 20:50:53,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 20:50:53,661 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 503 transitions, 6613 flow [2024-06-27 20:50:53,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:53,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:50:53,661 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] [2024-06-27 20:50:53,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:50:53,661 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:50:53,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:50:53,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1941225989, now seen corresponding path program 4 times [2024-06-27 20:50:53,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:50:53,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230489388] [2024-06-27 20:50:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:50:53,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:50:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:50:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:50:56,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:50:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230489388] [2024-06-27 20:50:56,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230489388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:50:56,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:50:56,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:50:56,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123404886] [2024-06-27 20:50:56,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:50:56,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:50:56,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:50:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:50:56,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:50:56,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:50:56,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 503 transitions, 6613 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:50:56,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:50:56,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:50:56,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:50:59,433 INFO L124 PetriNetUnfolderBase]: 4411/7223 cut-off events. [2024-06-27 20:50:59,433 INFO L125 PetriNetUnfolderBase]: For 711633/711642 co-relation queries the response was YES. [2024-06-27 20:50:59,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51406 conditions, 7223 events. 4411/7223 cut-off events. For 711633/711642 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 47926 event pairs, 867 based on Foata normal form. 12/7229 useless extension candidates. Maximal degree in co-relation 51264. Up to 5497 conditions per place. [2024-06-27 20:50:59,524 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 289 changer transitions 0/560 dead transitions. [2024-06-27 20:50:59,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 560 transitions, 8325 flow [2024-06-27 20:50:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 20:50:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 20:50:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 253 transitions. [2024-06-27 20:50:59,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015873015873016 [2024-06-27 20:50:59,526 INFO L175 Difference]: Start difference. First operand has 305 places, 503 transitions, 6613 flow. Second operand 15 states and 253 transitions. [2024-06-27 20:50:59,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 560 transitions, 8325 flow [2024-06-27 20:51:01,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 560 transitions, 8031 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:51:01,035 INFO L231 Difference]: Finished difference. Result has 313 places, 509 transitions, 7005 flow [2024-06-27 20:51:01,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6319, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7005, PETRI_PLACES=313, PETRI_TRANSITIONS=509} [2024-06-27 20:51:01,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 20:51:01,036 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 509 transitions, 7005 flow [2024-06-27 20:51:01,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:01,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:01,036 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] [2024-06-27 20:51:01,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:51:01,036 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:01,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1558821909, now seen corresponding path program 5 times [2024-06-27 20:51:01,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:01,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761755831] [2024-06-27 20:51:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:03,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:03,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761755831] [2024-06-27 20:51:03,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761755831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:03,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:03,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:51:03,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043935022] [2024-06-27 20:51:03,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:03,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:51:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:51:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:51:03,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:03,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 509 transitions, 7005 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:03,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:03,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:05,241 INFO L124 PetriNetUnfolderBase]: 4399/7219 cut-off events. [2024-06-27 20:51:05,241 INFO L125 PetriNetUnfolderBase]: For 692299/692304 co-relation queries the response was YES. [2024-06-27 20:51:05,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51994 conditions, 7219 events. 4399/7219 cut-off events. For 692299/692304 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47932 event pairs, 927 based on Foata normal form. 4/7217 useless extension candidates. Maximal degree in co-relation 51850. Up to 5487 conditions per place. [2024-06-27 20:51:05,333 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 277 changer transitions 0/534 dead transitions. [2024-06-27 20:51:05,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 534 transitions, 8503 flow [2024-06-27 20:51:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:51:05,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:51:05,335 INFO L175 Difference]: Start difference. First operand has 313 places, 509 transitions, 7005 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:51:05,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 534 transitions, 8503 flow [2024-06-27 20:51:07,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 534 transitions, 7909 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-27 20:51:07,236 INFO L231 Difference]: Finished difference. Result has 308 places, 509 transitions, 6974 flow [2024-06-27 20:51:07,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6411, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6974, PETRI_PLACES=308, PETRI_TRANSITIONS=509} [2024-06-27 20:51:07,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-27 20:51:07,237 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 509 transitions, 6974 flow [2024-06-27 20:51:07,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:07,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:07,237 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] [2024-06-27 20:51:07,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:51:07,237 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:07,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1781763532, now seen corresponding path program 1 times [2024-06-27 20:51:07,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:07,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250278147] [2024-06-27 20:51:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:10,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:10,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250278147] [2024-06-27 20:51:10,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250278147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:10,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:10,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:10,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976617520] [2024-06-27 20:51:10,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:10,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:10,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:10,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 509 transitions, 6974 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:10,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:10,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:10,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:12,584 INFO L124 PetriNetUnfolderBase]: 4443/7275 cut-off events. [2024-06-27 20:51:12,584 INFO L125 PetriNetUnfolderBase]: For 742740/742747 co-relation queries the response was YES. [2024-06-27 20:51:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52527 conditions, 7275 events. 4443/7275 cut-off events. For 742740/742747 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 48386 event pairs, 896 based on Foata normal form. 16/7287 useless extension candidates. Maximal degree in co-relation 52382. Up to 6419 conditions per place. [2024-06-27 20:51:12,680 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 72 changer transitions 0/547 dead transitions. [2024-06-27 20:51:12,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 547 transitions, 8241 flow [2024-06-27 20:51:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:51:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:51:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 20:51:12,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:51:12,682 INFO L175 Difference]: Start difference. First operand has 308 places, 509 transitions, 6974 flow. Second operand 10 states and 170 transitions. [2024-06-27 20:51:12,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 547 transitions, 8241 flow [2024-06-27 20:51:14,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 547 transitions, 7675 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:51:14,699 INFO L231 Difference]: Finished difference. Result has 311 places, 511 transitions, 6621 flow [2024-06-27 20:51:14,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6621, PETRI_PLACES=311, PETRI_TRANSITIONS=511} [2024-06-27 20:51:14,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 20:51:14,700 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 511 transitions, 6621 flow [2024-06-27 20:51:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:14,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:14,700 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] [2024-06-27 20:51:14,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:51:14,700 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:14,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1781770693, now seen corresponding path program 6 times [2024-06-27 20:51:14,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:14,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700096931] [2024-06-27 20:51:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:14,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:17,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:17,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700096931] [2024-06-27 20:51:17,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700096931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:17,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:17,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:17,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733683051] [2024-06-27 20:51:17,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:17,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:17,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:17,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:17,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:17,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 511 transitions, 6621 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:17,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:17,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:17,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:19,925 INFO L124 PetriNetUnfolderBase]: 4463/7294 cut-off events. [2024-06-27 20:51:19,925 INFO L125 PetriNetUnfolderBase]: For 718121/718126 co-relation queries the response was YES. [2024-06-27 20:51:19,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52079 conditions, 7294 events. 4463/7294 cut-off events. For 718121/718126 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 48296 event pairs, 899 based on Foata normal form. 4/7292 useless extension candidates. Maximal degree in co-relation 51933. Up to 5575 conditions per place. [2024-06-27 20:51:20,024 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 255 selfloop transitions, 291 changer transitions 0/551 dead transitions. [2024-06-27 20:51:20,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 551 transitions, 8085 flow [2024-06-27 20:51:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 20:51:20,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-27 20:51:20,025 INFO L175 Difference]: Start difference. First operand has 311 places, 511 transitions, 6621 flow. Second operand 11 states and 193 transitions. [2024-06-27 20:51:20,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 551 transitions, 8085 flow [2024-06-27 20:51:22,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 551 transitions, 7913 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:22,457 INFO L231 Difference]: Finished difference. Result has 314 places, 517 transitions, 7131 flow [2024-06-27 20:51:22,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6449, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7131, PETRI_PLACES=314, PETRI_TRANSITIONS=517} [2024-06-27 20:51:22,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-27 20:51:22,457 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 517 transitions, 7131 flow [2024-06-27 20:51:22,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:22,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:22,458 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] [2024-06-27 20:51:22,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:51:22,458 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:22,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:22,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1936584142, now seen corresponding path program 2 times [2024-06-27 20:51:22,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:22,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451653760] [2024-06-27 20:51:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:22,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:25,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:25,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451653760] [2024-06-27 20:51:25,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451653760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:25,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514517953] [2024-06-27 20:51:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:25,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:25,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:25,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:25,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 517 transitions, 7131 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:25,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:25,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:25,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:27,809 INFO L124 PetriNetUnfolderBase]: 4483/7338 cut-off events. [2024-06-27 20:51:27,810 INFO L125 PetriNetUnfolderBase]: For 735647/735652 co-relation queries the response was YES. [2024-06-27 20:51:27,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53178 conditions, 7338 events. 4483/7338 cut-off events. For 735647/735652 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 48743 event pairs, 905 based on Foata normal form. 4/7336 useless extension candidates. Maximal degree in co-relation 53031. Up to 5367 conditions per place. [2024-06-27 20:51:27,904 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 275 selfloop transitions, 277 changer transitions 0/557 dead transitions. [2024-06-27 20:51:27,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 557 transitions, 8831 flow [2024-06-27 20:51:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:51:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:51:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-27 20:51:27,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 20:51:27,905 INFO L175 Difference]: Start difference. First operand has 314 places, 517 transitions, 7131 flow. Second operand 11 states and 196 transitions. [2024-06-27 20:51:27,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 557 transitions, 8831 flow [2024-06-27 20:51:30,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 557 transitions, 8413 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:30,162 INFO L231 Difference]: Finished difference. Result has 317 places, 521 transitions, 7346 flow [2024-06-27 20:51:30,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6713, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7346, PETRI_PLACES=317, PETRI_TRANSITIONS=521} [2024-06-27 20:51:30,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-27 20:51:30,163 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 521 transitions, 7346 flow [2024-06-27 20:51:30,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:30,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:30,163 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] [2024-06-27 20:51:30,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:51:30,163 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:30,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:30,163 INFO L85 PathProgramCache]: Analyzing trace with hash 174942786, now seen corresponding path program 2 times [2024-06-27 20:51:30,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:30,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195188927] [2024-06-27 20:51:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:30,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:33,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:33,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195188927] [2024-06-27 20:51:33,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195188927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:33,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:33,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:33,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254963893] [2024-06-27 20:51:33,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:33,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:33,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:33,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:33,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 521 transitions, 7346 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:33,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:33,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:33,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:35,772 INFO L124 PetriNetUnfolderBase]: 4527/7431 cut-off events. [2024-06-27 20:51:35,772 INFO L125 PetriNetUnfolderBase]: For 790508/790523 co-relation queries the response was YES. [2024-06-27 20:51:35,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53970 conditions, 7431 events. 4527/7431 cut-off events. For 790508/790523 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 49645 event pairs, 907 based on Foata normal form. 24/7451 useless extension candidates. Maximal degree in co-relation 53822. Up to 6551 conditions per place. [2024-06-27 20:51:35,860 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 64 changer transitions 0/551 dead transitions. [2024-06-27 20:51:35,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 551 transitions, 8601 flow [2024-06-27 20:51:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:51:35,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:51:35,861 INFO L175 Difference]: Start difference. First operand has 317 places, 521 transitions, 7346 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:51:35,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 551 transitions, 8601 flow [2024-06-27 20:51:38,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 551 transitions, 8026 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 20:51:38,241 INFO L231 Difference]: Finished difference. Result has 317 places, 523 transitions, 6970 flow [2024-06-27 20:51:38,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6771, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6970, PETRI_PLACES=317, PETRI_TRANSITIONS=523} [2024-06-27 20:51:38,242 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-27 20:51:38,242 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 523 transitions, 6970 flow [2024-06-27 20:51:38,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:38,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:38,242 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] [2024-06-27 20:51:38,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:51:38,242 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:38,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash -707610298, now seen corresponding path program 3 times [2024-06-27 20:51:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980991841] [2024-06-27 20:51:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:41,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980991841] [2024-06-27 20:51:41,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980991841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:41,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:41,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262354119] [2024-06-27 20:51:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:41,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:41,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:41,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:41,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:41,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 523 transitions, 6970 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:41,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:41,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:41,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:43,354 INFO L124 PetriNetUnfolderBase]: 4515/7417 cut-off events. [2024-06-27 20:51:43,355 INFO L125 PetriNetUnfolderBase]: For 742467/742472 co-relation queries the response was YES. [2024-06-27 20:51:43,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52755 conditions, 7417 events. 4515/7417 cut-off events. For 742467/742472 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49526 event pairs, 993 based on Foata normal form. 4/7415 useless extension candidates. Maximal degree in co-relation 52606. Up to 5427 conditions per place. [2024-06-27 20:51:43,455 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 289 selfloop transitions, 256 changer transitions 0/550 dead transitions. [2024-06-27 20:51:43,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 550 transitions, 8370 flow [2024-06-27 20:51:43,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:43,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:51:43,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:51:43,457 INFO L175 Difference]: Start difference. First operand has 317 places, 523 transitions, 6970 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:51:43,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 550 transitions, 8370 flow [2024-06-27 20:51:45,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 550 transitions, 8172 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:51:45,826 INFO L231 Difference]: Finished difference. Result has 320 places, 523 transitions, 7292 flow [2024-06-27 20:51:45,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7292, PETRI_PLACES=320, PETRI_TRANSITIONS=523} [2024-06-27 20:51:45,826 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 20:51:45,827 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 523 transitions, 7292 flow [2024-06-27 20:51:45,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:45,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:45,827 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] [2024-06-27 20:51:45,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:51:45,827 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:45,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:45,828 INFO L85 PathProgramCache]: Analyzing trace with hash 174704985, now seen corresponding path program 7 times [2024-06-27 20:51:45,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:45,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143381167] [2024-06-27 20:51:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:45,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:48,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:48,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:48,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143381167] [2024-06-27 20:51:48,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143381167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:48,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:48,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:48,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616801267] [2024-06-27 20:51:48,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:48,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:48,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:48,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:48,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 523 transitions, 7292 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:48,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:48,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:48,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:50,889 INFO L124 PetriNetUnfolderBase]: 4503/7387 cut-off events. [2024-06-27 20:51:50,889 INFO L125 PetriNetUnfolderBase]: For 737708/737713 co-relation queries the response was YES. [2024-06-27 20:51:50,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52854 conditions, 7387 events. 4503/7387 cut-off events. For 737708/737713 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49173 event pairs, 975 based on Foata normal form. 4/7385 useless extension candidates. Maximal degree in co-relation 52704. Up to 5645 conditions per place. [2024-06-27 20:51:50,987 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 271 selfloop transitions, 273 changer transitions 0/549 dead transitions. [2024-06-27 20:51:50,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 549 transitions, 8646 flow [2024-06-27 20:51:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:51:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:51:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:51:50,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:51:50,991 INFO L175 Difference]: Start difference. First operand has 320 places, 523 transitions, 7292 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:51:50,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 549 transitions, 8646 flow [2024-06-27 20:51:53,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 549 transitions, 8074 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:51:53,163 INFO L231 Difference]: Finished difference. Result has 320 places, 523 transitions, 7276 flow [2024-06-27 20:51:53,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6720, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7276, PETRI_PLACES=320, PETRI_TRANSITIONS=523} [2024-06-27 20:51:53,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 20:51:53,164 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 523 transitions, 7276 flow [2024-06-27 20:51:53,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:53,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:51:53,164 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] [2024-06-27 20:51:53,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:51:53,164 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:51:53,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:51:53,165 INFO L85 PathProgramCache]: Analyzing trace with hash 183283026, now seen corresponding path program 3 times [2024-06-27 20:51:53,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:51:53,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605535380] [2024-06-27 20:51:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:51:53,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:51:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:51:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:51:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:51:56,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605535380] [2024-06-27 20:51:56,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605535380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:51:56,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:51:56,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:51:56,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303807563] [2024-06-27 20:51:56,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:51:56,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:51:56,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:51:56,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:51:56,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:51:56,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:51:56,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 523 transitions, 7276 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:51:56,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:51:56,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:51:56,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:51:58,513 INFO L124 PetriNetUnfolderBase]: 4488/7376 cut-off events. [2024-06-27 20:51:58,513 INFO L125 PetriNetUnfolderBase]: For 741918/741933 co-relation queries the response was YES. [2024-06-27 20:51:58,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51927 conditions, 7376 events. 4488/7376 cut-off events. For 741918/741933 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 49375 event pairs, 866 based on Foata normal form. 24/7396 useless extension candidates. Maximal degree in co-relation 51776. Up to 6058 conditions per place. [2024-06-27 20:51:58,625 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 487 selfloop transitions, 66 changer transitions 0/558 dead transitions. [2024-06-27 20:51:58,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 558 transitions, 8791 flow [2024-06-27 20:51:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:51:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:51:58,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:51:58,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:51:58,626 INFO L175 Difference]: Start difference. First operand has 320 places, 523 transitions, 7276 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:51:58,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 558 transitions, 8791 flow [2024-06-27 20:52:00,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 558 transitions, 8077 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:52:00,844 INFO L231 Difference]: Finished difference. Result has 319 places, 525 transitions, 6767 flow [2024-06-27 20:52:00,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6562, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6767, PETRI_PLACES=319, PETRI_TRANSITIONS=525} [2024-06-27 20:52:00,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-27 20:52:00,844 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 525 transitions, 6767 flow [2024-06-27 20:52:00,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:00,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:00,845 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] [2024-06-27 20:52:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:52:00,845 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:00,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash -284133804, now seen corresponding path program 4 times [2024-06-27 20:52:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:00,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438205169] [2024-06-27 20:52:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:00,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:03,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:03,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438205169] [2024-06-27 20:52:03,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438205169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:03,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:03,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:03,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483311961] [2024-06-27 20:52:03,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:03,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:03,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:03,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:03,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:03,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:03,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 525 transitions, 6767 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:03,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:03,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:03,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:06,166 INFO L124 PetriNetUnfolderBase]: 4498/7357 cut-off events. [2024-06-27 20:52:06,166 INFO L125 PetriNetUnfolderBase]: For 701893/701901 co-relation queries the response was YES. [2024-06-27 20:52:06,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51431 conditions, 7357 events. 4498/7357 cut-off events. For 701893/701901 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 48935 event pairs, 967 based on Foata normal form. 8/7341 useless extension candidates. Maximal degree in co-relation 51279. Up to 6228 conditions per place. [2024-06-27 20:52:06,264 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 404 selfloop transitions, 150 changer transitions 0/559 dead transitions. [2024-06-27 20:52:06,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 559 transitions, 8049 flow [2024-06-27 20:52:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:52:06,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:52:06,266 INFO L175 Difference]: Start difference. First operand has 319 places, 525 transitions, 6767 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:52:06,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 559 transitions, 8049 flow [2024-06-27 20:52:09,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 559 transitions, 7912 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:52:09,220 INFO L231 Difference]: Finished difference. Result has 323 places, 528 transitions, 7022 flow [2024-06-27 20:52:09,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6630, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7022, PETRI_PLACES=323, PETRI_TRANSITIONS=528} [2024-06-27 20:52:09,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-27 20:52:09,221 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 528 transitions, 7022 flow [2024-06-27 20:52:09,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:09,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:09,221 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] [2024-06-27 20:52:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:52:09,221 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:09,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1990955631, now seen corresponding path program 8 times [2024-06-27 20:52:09,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:09,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92008265] [2024-06-27 20:52:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:11,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:11,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92008265] [2024-06-27 20:52:11,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92008265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:11,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:11,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10840093] [2024-06-27 20:52:11,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:11,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:11,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:11,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:11,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 528 transitions, 7022 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:11,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:11,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:11,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:14,595 INFO L124 PetriNetUnfolderBase]: 4602/7554 cut-off events. [2024-06-27 20:52:14,596 INFO L125 PetriNetUnfolderBase]: For 788432/788440 co-relation queries the response was YES. [2024-06-27 20:52:14,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53797 conditions, 7554 events. 4602/7554 cut-off events. For 788432/788440 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 50636 event pairs, 939 based on Foata normal form. 14/7554 useless extension candidates. Maximal degree in co-relation 53644. Up to 6350 conditions per place. [2024-06-27 20:52:14,703 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 155 changer transitions 0/596 dead transitions. [2024-06-27 20:52:14,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 596 transitions, 8906 flow [2024-06-27 20:52:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-27 20:52:14,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:52:14,704 INFO L175 Difference]: Start difference. First operand has 323 places, 528 transitions, 7022 flow. Second operand 12 states and 207 transitions. [2024-06-27 20:52:14,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 596 transitions, 8906 flow [2024-06-27 20:52:17,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 596 transitions, 8510 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:17,533 INFO L231 Difference]: Finished difference. Result has 329 places, 552 transitions, 7382 flow [2024-06-27 20:52:17,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6626, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7382, PETRI_PLACES=329, PETRI_TRANSITIONS=552} [2024-06-27 20:52:17,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 20:52:17,534 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 552 transitions, 7382 flow [2024-06-27 20:52:17,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:17,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:17,534 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] [2024-06-27 20:52:17,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:52:17,534 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:17,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -760951882, now seen corresponding path program 5 times [2024-06-27 20:52:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:17,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285992622] [2024-06-27 20:52:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:20,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:20,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285992622] [2024-06-27 20:52:20,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285992622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:20,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:20,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:20,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549181044] [2024-06-27 20:52:20,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:20,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:20,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:20,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:20,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:20,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:20,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 552 transitions, 7382 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:20,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:20,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:20,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:23,058 INFO L124 PetriNetUnfolderBase]: 4612/7533 cut-off events. [2024-06-27 20:52:23,059 INFO L125 PetriNetUnfolderBase]: For 775487/775495 co-relation queries the response was YES. [2024-06-27 20:52:23,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53969 conditions, 7533 events. 4612/7533 cut-off events. For 775487/775495 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 50210 event pairs, 985 based on Foata normal form. 8/7517 useless extension candidates. Maximal degree in co-relation 53815. Up to 6424 conditions per place. [2024-06-27 20:52:23,157 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 446 selfloop transitions, 134 changer transitions 0/585 dead transitions. [2024-06-27 20:52:23,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 585 transitions, 8706 flow [2024-06-27 20:52:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:52:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:52:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:52:23,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:52:23,158 INFO L175 Difference]: Start difference. First operand has 329 places, 552 transitions, 7382 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:52:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 585 transitions, 8706 flow [2024-06-27 20:52:26,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 585 transitions, 8384 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 20:52:26,041 INFO L231 Difference]: Finished difference. Result has 329 places, 555 transitions, 7415 flow [2024-06-27 20:52:26,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7415, PETRI_PLACES=329, PETRI_TRANSITIONS=555} [2024-06-27 20:52:26,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 20:52:26,041 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 555 transitions, 7415 flow [2024-06-27 20:52:26,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:26,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:26,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:52:26,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:52:26,041 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:26,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:26,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1070379665, now seen corresponding path program 9 times [2024-06-27 20:52:26,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:26,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226115178] [2024-06-27 20:52:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:28,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:28,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226115178] [2024-06-27 20:52:28,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226115178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:28,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:28,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331540321] [2024-06-27 20:52:28,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:28,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:28,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:28,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:28,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:28,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 555 transitions, 7415 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:28,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:28,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:28,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:31,446 INFO L124 PetriNetUnfolderBase]: 4588/7504 cut-off events. [2024-06-27 20:52:31,446 INFO L125 PetriNetUnfolderBase]: For 778399/778403 co-relation queries the response was YES. [2024-06-27 20:52:31,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53015 conditions, 7504 events. 4588/7504 cut-off events. For 778399/778403 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 50053 event pairs, 967 based on Foata normal form. 10/7492 useless extension candidates. Maximal degree in co-relation 52860. Up to 6276 conditions per place. [2024-06-27 20:52:31,551 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 172 changer transitions 0/594 dead transitions. [2024-06-27 20:52:31,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 594 transitions, 8915 flow [2024-06-27 20:52:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:52:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:52:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-06-27 20:52:31,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-27 20:52:31,552 INFO L175 Difference]: Start difference. First operand has 329 places, 555 transitions, 7415 flow. Second operand 12 states and 206 transitions. [2024-06-27 20:52:31,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 594 transitions, 8915 flow [2024-06-27 20:52:34,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 594 transitions, 8576 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:34,437 INFO L231 Difference]: Finished difference. Result has 334 places, 555 transitions, 7438 flow [2024-06-27 20:52:34,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7076, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7438, PETRI_PLACES=334, PETRI_TRANSITIONS=555} [2024-06-27 20:52:34,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-27 20:52:34,437 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 555 transitions, 7438 flow [2024-06-27 20:52:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:34,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:34,438 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] [2024-06-27 20:52:34,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:52:34,438 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:34,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash -760952099, now seen corresponding path program 10 times [2024-06-27 20:52:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:34,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133895184] [2024-06-27 20:52:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:37,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:37,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133895184] [2024-06-27 20:52:37,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133895184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:37,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:37,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:37,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094855689] [2024-06-27 20:52:37,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:37,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:37,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 555 transitions, 7438 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:37,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:37,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:37,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:39,642 INFO L124 PetriNetUnfolderBase]: 4564/7508 cut-off events. [2024-06-27 20:52:39,642 INFO L125 PetriNetUnfolderBase]: For 744266/744274 co-relation queries the response was YES. [2024-06-27 20:52:39,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52206 conditions, 7508 events. 4564/7508 cut-off events. For 744266/744274 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 50520 event pairs, 937 based on Foata normal form. 14/7508 useless extension candidates. Maximal degree in co-relation 52050. Up to 6312 conditions per place. [2024-06-27 20:52:39,907 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 155 changer transitions 0/596 dead transitions. [2024-06-27 20:52:39,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 596 transitions, 8746 flow [2024-06-27 20:52:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:39,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-27 20:52:39,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-27 20:52:39,908 INFO L175 Difference]: Start difference. First operand has 334 places, 555 transitions, 7438 flow. Second operand 11 states and 193 transitions. [2024-06-27 20:52:39,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 596 transitions, 8746 flow [2024-06-27 20:52:43,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 596 transitions, 7901 flow, removed 46 selfloop flow, removed 14 redundant places. [2024-06-27 20:52:43,096 INFO L231 Difference]: Finished difference. Result has 331 places, 555 transitions, 6919 flow [2024-06-27 20:52:43,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6593, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6919, PETRI_PLACES=331, PETRI_TRANSITIONS=555} [2024-06-27 20:52:43,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 20:52:43,097 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 555 transitions, 6919 flow [2024-06-27 20:52:43,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:43,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:43,097 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] [2024-06-27 20:52:43,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:52:43,097 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:43,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:43,098 INFO L85 PathProgramCache]: Analyzing trace with hash -14605696, now seen corresponding path program 6 times [2024-06-27 20:52:43,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:43,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045592492] [2024-06-27 20:52:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:43,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:46,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:46,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045592492] [2024-06-27 20:52:46,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045592492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:46,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:46,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:46,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871382284] [2024-06-27 20:52:46,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:46,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:46,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:46,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:46,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:46,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:46,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 555 transitions, 6919 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:46,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:46,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:46,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:48,631 INFO L124 PetriNetUnfolderBase]: 4574/7472 cut-off events. [2024-06-27 20:52:48,631 INFO L125 PetriNetUnfolderBase]: For 719755/719759 co-relation queries the response was YES. [2024-06-27 20:52:48,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51814 conditions, 7472 events. 4574/7472 cut-off events. For 719755/719759 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 49759 event pairs, 978 based on Foata normal form. 4/7450 useless extension candidates. Maximal degree in co-relation 51658. Up to 6295 conditions per place. [2024-06-27 20:52:48,747 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 437 selfloop transitions, 153 changer transitions 0/595 dead transitions. [2024-06-27 20:52:48,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 595 transitions, 8569 flow [2024-06-27 20:52:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:52:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:52:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 20:52:48,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-27 20:52:48,748 INFO L175 Difference]: Start difference. First operand has 331 places, 555 transitions, 6919 flow. Second operand 11 states and 188 transitions. [2024-06-27 20:52:48,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 595 transitions, 8569 flow [2024-06-27 20:52:51,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 595 transitions, 8215 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-27 20:52:51,442 INFO L231 Difference]: Finished difference. Result has 331 places, 561 transitions, 7044 flow [2024-06-27 20:52:51,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7044, PETRI_PLACES=331, PETRI_TRANSITIONS=561} [2024-06-27 20:52:51,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 20:52:51,443 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 561 transitions, 7044 flow [2024-06-27 20:52:51,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:51,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:51,443 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] [2024-06-27 20:52:51,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:52:51,443 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:51,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash 764046843, now seen corresponding path program 11 times [2024-06-27 20:52:51,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:51,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761401485] [2024-06-27 20:52:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:51,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:52:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:52:54,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:52:54,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761401485] [2024-06-27 20:52:54,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761401485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:52:54,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:52:54,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:52:54,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634307675] [2024-06-27 20:52:54,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:52:54,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:52:54,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:52:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:52:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:52:54,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:52:54,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 561 transitions, 7044 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:54,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:52:54,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:52:54,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:52:57,173 INFO L124 PetriNetUnfolderBase]: 4582/7508 cut-off events. [2024-06-27 20:52:57,173 INFO L125 PetriNetUnfolderBase]: For 744346/744350 co-relation queries the response was YES. [2024-06-27 20:52:57,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51352 conditions, 7508 events. 4582/7508 cut-off events. For 744346/744350 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 50248 event pairs, 963 based on Foata normal form. 10/7496 useless extension candidates. Maximal degree in co-relation 51196. Up to 6268 conditions per place. [2024-06-27 20:52:57,268 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 178 changer transitions 0/610 dead transitions. [2024-06-27 20:52:57,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 610 transitions, 8668 flow [2024-06-27 20:52:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 20:52:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 20:52:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 232 transitions. [2024-06-27 20:52:57,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:52:57,269 INFO L175 Difference]: Start difference. First operand has 331 places, 561 transitions, 7044 flow. Second operand 14 states and 232 transitions. [2024-06-27 20:52:57,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 610 transitions, 8668 flow [2024-06-27 20:52:59,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 610 transitions, 8406 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:52:59,423 INFO L231 Difference]: Finished difference. Result has 338 places, 567 transitions, 7232 flow [2024-06-27 20:52:59,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7232, PETRI_PLACES=338, PETRI_TRANSITIONS=567} [2024-06-27 20:52:59,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-27 20:52:59,424 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 567 transitions, 7232 flow [2024-06-27 20:52:59,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:52:59,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:52:59,424 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] [2024-06-27 20:52:59,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:52:59,424 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:52:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:52:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1136445853, now seen corresponding path program 12 times [2024-06-27 20:52:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:52:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346992870] [2024-06-27 20:52:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:52:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:52:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:02,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:02,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346992870] [2024-06-27 20:53:02,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346992870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:02,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:02,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:02,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922464626] [2024-06-27 20:53:02,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:02,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:02,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:02,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:02,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 567 transitions, 7232 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:02,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:02,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:02,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:04,424 INFO L124 PetriNetUnfolderBase]: 4570/7475 cut-off events. [2024-06-27 20:53:04,425 INFO L125 PetriNetUnfolderBase]: For 707977/707979 co-relation queries the response was YES. [2024-06-27 20:53:04,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51380 conditions, 7475 events. 4570/7475 cut-off events. For 707977/707979 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49887 event pairs, 985 based on Foata normal form. 4/7455 useless extension candidates. Maximal degree in co-relation 51222. Up to 6314 conditions per place. [2024-06-27 20:53:04,529 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 435 selfloop transitions, 153 changer transitions 0/593 dead transitions. [2024-06-27 20:53:04,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 593 transitions, 8482 flow [2024-06-27 20:53:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:53:04,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:53:04,530 INFO L175 Difference]: Start difference. First operand has 338 places, 567 transitions, 7232 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:53:04,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 593 transitions, 8482 flow [2024-06-27 20:53:07,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 593 transitions, 8110 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-27 20:53:07,453 INFO L231 Difference]: Finished difference. Result has 335 places, 567 transitions, 7175 flow [2024-06-27 20:53:07,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7175, PETRI_PLACES=335, PETRI_TRANSITIONS=567} [2024-06-27 20:53:07,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 20:53:07,453 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 567 transitions, 7175 flow [2024-06-27 20:53:07,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:07,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:07,453 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] [2024-06-27 20:53:07,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:53:07,454 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:07,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash -718970254, now seen corresponding path program 7 times [2024-06-27 20:53:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451236910] [2024-06-27 20:53:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:10,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:10,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451236910] [2024-06-27 20:53:10,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451236910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:10,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:10,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497984474] [2024-06-27 20:53:10,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:10,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:10,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:10,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:10,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:10,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 567 transitions, 7175 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:10,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:10,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:10,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:12,885 INFO L124 PetriNetUnfolderBase]: 4564/7463 cut-off events. [2024-06-27 20:53:12,885 INFO L125 PetriNetUnfolderBase]: For 695506/695508 co-relation queries the response was YES. [2024-06-27 20:53:12,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51097 conditions, 7463 events. 4564/7463 cut-off events. For 695506/695508 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 49794 event pairs, 985 based on Foata normal form. 2/7439 useless extension candidates. Maximal degree in co-relation 50938. Up to 6286 conditions per place. [2024-06-27 20:53:12,978 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 152 changer transitions 0/593 dead transitions. [2024-06-27 20:53:12,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 593 transitions, 8425 flow [2024-06-27 20:53:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:53:12,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:53:12,979 INFO L175 Difference]: Start difference. First operand has 335 places, 567 transitions, 7175 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:53:12,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 593 transitions, 8425 flow [2024-06-27 20:53:16,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 593 transitions, 8071 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 20:53:16,260 INFO L231 Difference]: Finished difference. Result has 336 places, 567 transitions, 7132 flow [2024-06-27 20:53:16,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6821, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7132, PETRI_PLACES=336, PETRI_TRANSITIONS=567} [2024-06-27 20:53:16,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 20:53:16,261 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 567 transitions, 7132 flow [2024-06-27 20:53:16,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:16,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:16,261 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] [2024-06-27 20:53:16,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:53:16,261 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:16,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -377166922, now seen corresponding path program 8 times [2024-06-27 20:53:16,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:16,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731987583] [2024-06-27 20:53:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:16,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:19,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731987583] [2024-06-27 20:53:19,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731987583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:19,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:19,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:19,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117918919] [2024-06-27 20:53:19,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:19,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:19,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:19,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:19,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 567 transitions, 7132 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:19,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:19,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:19,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:21,692 INFO L124 PetriNetUnfolderBase]: 4606/7483 cut-off events. [2024-06-27 20:53:21,692 INFO L125 PetriNetUnfolderBase]: For 734628/734636 co-relation queries the response was YES. [2024-06-27 20:53:21,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52094 conditions, 7483 events. 4606/7483 cut-off events. For 734628/734636 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49675 event pairs, 928 based on Foata normal form. 8/7463 useless extension candidates. Maximal degree in co-relation 51934. Up to 5192 conditions per place. [2024-06-27 20:53:21,802 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 247 selfloop transitions, 361 changer transitions 0/613 dead transitions. [2024-06-27 20:53:21,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 613 transitions, 9430 flow [2024-06-27 20:53:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:53:21,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:53:21,804 INFO L175 Difference]: Start difference. First operand has 336 places, 567 transitions, 7132 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:53:21,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 613 transitions, 9430 flow [2024-06-27 20:53:24,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 613 transitions, 9001 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 20:53:24,911 INFO L231 Difference]: Finished difference. Result has 336 places, 580 transitions, 7765 flow [2024-06-27 20:53:24,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6703, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7765, PETRI_PLACES=336, PETRI_TRANSITIONS=580} [2024-06-27 20:53:24,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 20:53:24,911 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 580 transitions, 7765 flow [2024-06-27 20:53:24,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:24,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:24,912 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] [2024-06-27 20:53:24,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:53:24,912 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:24,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash -578638339, now seen corresponding path program 13 times [2024-06-27 20:53:24,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:24,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405099824] [2024-06-27 20:53:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:27,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:27,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405099824] [2024-06-27 20:53:27,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405099824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:27,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:27,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:27,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299225431] [2024-06-27 20:53:27,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:27,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:27,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:27,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:27,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:27,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:27,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 580 transitions, 7765 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:27,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:27,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:27,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:30,425 INFO L124 PetriNetUnfolderBase]: 4632/7621 cut-off events. [2024-06-27 20:53:30,426 INFO L125 PetriNetUnfolderBase]: For 764037/764045 co-relation queries the response was YES. [2024-06-27 20:53:30,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53677 conditions, 7621 events. 4632/7621 cut-off events. For 764037/764045 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 51450 event pairs, 833 based on Foata normal form. 8/7615 useless extension candidates. Maximal degree in co-relation 53517. Up to 6025 conditions per place. [2024-06-27 20:53:30,525 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 356 selfloop transitions, 267 changer transitions 0/628 dead transitions. [2024-06-27 20:53:30,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 628 transitions, 9653 flow [2024-06-27 20:53:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:53:30,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:53:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-27 20:53:30,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-27 20:53:30,526 INFO L175 Difference]: Start difference. First operand has 336 places, 580 transitions, 7765 flow. Second operand 11 states and 191 transitions. [2024-06-27 20:53:30,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 628 transitions, 9653 flow [2024-06-27 20:53:33,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 628 transitions, 9382 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-27 20:53:33,588 INFO L231 Difference]: Finished difference. Result has 344 places, 586 transitions, 8108 flow [2024-06-27 20:53:33,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7494, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8108, PETRI_PLACES=344, PETRI_TRANSITIONS=586} [2024-06-27 20:53:33,589 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 20:53:33,589 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 586 transitions, 8108 flow [2024-06-27 20:53:33,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:33,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:33,589 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] [2024-06-27 20:53:33,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:53:33,590 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:33,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1982693194, now seen corresponding path program 4 times [2024-06-27 20:53:33,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:33,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789551895] [2024-06-27 20:53:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:33,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:36,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:36,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789551895] [2024-06-27 20:53:36,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789551895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:36,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:36,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:36,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979263024] [2024-06-27 20:53:36,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:36,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:36,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:36,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:36,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 586 transitions, 8108 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:36,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:36,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:36,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:38,867 INFO L124 PetriNetUnfolderBase]: 4620/7611 cut-off events. [2024-06-27 20:53:38,867 INFO L125 PetriNetUnfolderBase]: For 759907/759913 co-relation queries the response was YES. [2024-06-27 20:53:38,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53708 conditions, 7611 events. 4620/7611 cut-off events. For 759907/759913 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 51460 event pairs, 989 based on Foata normal form. 6/7603 useless extension candidates. Maximal degree in co-relation 53545. Up to 6894 conditions per place. [2024-06-27 20:53:38,975 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 568 selfloop transitions, 38 changer transitions 0/611 dead transitions. [2024-06-27 20:53:38,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 611 transitions, 9396 flow [2024-06-27 20:53:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:53:38,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:53:38,976 INFO L175 Difference]: Start difference. First operand has 344 places, 586 transitions, 8108 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:53:38,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 611 transitions, 9396 flow [2024-06-27 20:53:42,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 611 transitions, 8805 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 20:53:42,733 INFO L231 Difference]: Finished difference. Result has 344 places, 586 transitions, 7599 flow [2024-06-27 20:53:42,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7517, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7599, PETRI_PLACES=344, PETRI_TRANSITIONS=586} [2024-06-27 20:53:42,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 20:53:42,734 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 586 transitions, 7599 flow [2024-06-27 20:53:42,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:42,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:42,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:53:42,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:53:42,734 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:42,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash -376900012, now seen corresponding path program 9 times [2024-06-27 20:53:42,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:42,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307056657] [2024-06-27 20:53:42,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:42,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:45,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:45,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307056657] [2024-06-27 20:53:45,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307056657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:45,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:45,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:45,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520871207] [2024-06-27 20:53:45,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:45,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:45,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:45,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:45,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:45,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:45,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 586 transitions, 7599 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:45,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:45,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:45,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:48,151 INFO L124 PetriNetUnfolderBase]: 4614/7492 cut-off events. [2024-06-27 20:53:48,151 INFO L125 PetriNetUnfolderBase]: For 756942/756950 co-relation queries the response was YES. [2024-06-27 20:53:48,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52230 conditions, 7492 events. 4614/7492 cut-off events. For 756942/756950 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 49756 event pairs, 925 based on Foata normal form. 8/7472 useless extension candidates. Maximal degree in co-relation 52067. Up to 5184 conditions per place. [2024-06-27 20:53:48,262 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 242 selfloop transitions, 371 changer transitions 0/618 dead transitions. [2024-06-27 20:53:48,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 618 transitions, 9369 flow [2024-06-27 20:53:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:53:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:53:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:53:48,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:53:48,264 INFO L175 Difference]: Start difference. First operand has 344 places, 586 transitions, 7599 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:53:48,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 618 transitions, 9369 flow [2024-06-27 20:53:51,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 618 transitions, 9166 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 20:53:51,432 INFO L231 Difference]: Finished difference. Result has 345 places, 586 transitions, 8144 flow [2024-06-27 20:53:51,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7396, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8144, PETRI_PLACES=345, PETRI_TRANSITIONS=586} [2024-06-27 20:53:51,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-27 20:53:51,433 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 586 transitions, 8144 flow [2024-06-27 20:53:51,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:51,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:53:51,433 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] [2024-06-27 20:53:51,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:53:51,433 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:53:51,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:53:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1535950324, now seen corresponding path program 5 times [2024-06-27 20:53:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:53:51,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054958067] [2024-06-27 20:53:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:53:51,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:53:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:53:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:53:54,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:53:54,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054958067] [2024-06-27 20:53:54,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054958067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:53:54,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:53:54,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:53:54,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406409814] [2024-06-27 20:53:54,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:53:54,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:53:54,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:53:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:53:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:53:54,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:53:54,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 586 transitions, 8144 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:53:54,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:53:54,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:53:54,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:53:56,961 INFO L124 PetriNetUnfolderBase]: 4622/7594 cut-off events. [2024-06-27 20:53:56,961 INFO L125 PetriNetUnfolderBase]: For 771776/771784 co-relation queries the response was YES. [2024-06-27 20:53:57,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53667 conditions, 7594 events. 4622/7594 cut-off events. For 771776/771784 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 51132 event pairs, 836 based on Foata normal form. 8/7588 useless extension candidates. Maximal degree in co-relation 53503. Up to 6652 conditions per place. [2024-06-27 20:53:57,052 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 516 selfloop transitions, 91 changer transitions 0/612 dead transitions. [2024-06-27 20:53:57,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 612 transitions, 9483 flow [2024-06-27 20:53:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:53:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:53:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:53:57,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:53:57,053 INFO L175 Difference]: Start difference. First operand has 345 places, 586 transitions, 8144 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:53:57,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 612 transitions, 9483 flow [2024-06-27 20:54:00,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 612 transitions, 8829 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:54:00,800 INFO L231 Difference]: Finished difference. Result has 346 places, 588 transitions, 7738 flow [2024-06-27 20:54:00,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7490, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7738, PETRI_PLACES=346, PETRI_TRANSITIONS=588} [2024-06-27 20:54:00,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 20:54:00,800 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 588 transitions, 7738 flow [2024-06-27 20:54:00,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:00,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:00,801 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] [2024-06-27 20:54:00,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:54:00,801 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:00,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 33100839, now seen corresponding path program 14 times [2024-06-27 20:54:00,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:00,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828029999] [2024-06-27 20:54:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:00,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:03,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:03,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828029999] [2024-06-27 20:54:03,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828029999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:03,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:03,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:54:03,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232653994] [2024-06-27 20:54:03,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:54:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:54:03,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:54:03,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:03,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 588 transitions, 7738 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:03,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:03,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:03,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:05,600 INFO L124 PetriNetUnfolderBase]: 4616/7613 cut-off events. [2024-06-27 20:54:05,600 INFO L125 PetriNetUnfolderBase]: For 768236/768269 co-relation queries the response was YES. [2024-06-27 20:54:05,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52514 conditions, 7613 events. 4616/7613 cut-off events. For 768236/768269 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51434 event pairs, 927 based on Foata normal form. 4/7596 useless extension candidates. Maximal degree in co-relation 52349. Up to 6004 conditions per place. [2024-06-27 20:54:05,705 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 239 changer transitions 0/607 dead transitions. [2024-06-27 20:54:05,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 607 transitions, 9224 flow [2024-06-27 20:54:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:05,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:54:05,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:54:05,706 INFO L175 Difference]: Start difference. First operand has 346 places, 588 transitions, 7738 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:54:05,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 607 transitions, 9224 flow [2024-06-27 20:54:09,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 607 transitions, 8995 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:09,354 INFO L231 Difference]: Finished difference. Result has 348 places, 588 transitions, 7993 flow [2024-06-27 20:54:09,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7993, PETRI_PLACES=348, PETRI_TRANSITIONS=588} [2024-06-27 20:54:09,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 20:54:09,355 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 588 transitions, 7993 flow [2024-06-27 20:54:09,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:09,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:09,355 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] [2024-06-27 20:54:09,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:54:09,355 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:09,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:09,355 INFO L85 PathProgramCache]: Analyzing trace with hash 3469684, now seen corresponding path program 6 times [2024-06-27 20:54:09,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:09,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121246456] [2024-06-27 20:54:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:09,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:12,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:12,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121246456] [2024-06-27 20:54:12,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121246456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:12,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:12,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:12,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346939004] [2024-06-27 20:54:12,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:12,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:12,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:12,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:12,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:12,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:12,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 588 transitions, 7993 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:12,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:12,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:12,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:14,811 INFO L124 PetriNetUnfolderBase]: 4624/7606 cut-off events. [2024-06-27 20:54:14,812 INFO L125 PetriNetUnfolderBase]: For 782517/782525 co-relation queries the response was YES. [2024-06-27 20:54:14,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53135 conditions, 7606 events. 4624/7606 cut-off events. For 782517/782525 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51343 event pairs, 838 based on Foata normal form. 8/7600 useless extension candidates. Maximal degree in co-relation 52969. Up to 6570 conditions per place. [2024-06-27 20:54:14,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 515 selfloop transitions, 98 changer transitions 0/618 dead transitions. [2024-06-27 20:54:14,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 618 transitions, 9382 flow [2024-06-27 20:54:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:54:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:54:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:54:14,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:54:14,905 INFO L175 Difference]: Start difference. First operand has 348 places, 588 transitions, 7993 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:54:14,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 618 transitions, 9382 flow [2024-06-27 20:54:18,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 618 transitions, 8886 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:18,300 INFO L231 Difference]: Finished difference. Result has 350 places, 590 transitions, 7757 flow [2024-06-27 20:54:18,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7497, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7757, PETRI_PLACES=350, PETRI_TRANSITIONS=590} [2024-06-27 20:54:18,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-27 20:54:18,301 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 590 transitions, 7757 flow [2024-06-27 20:54:18,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:18,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:18,301 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] [2024-06-27 20:54:18,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:54:18,301 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:18,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:18,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1543295030, now seen corresponding path program 10 times [2024-06-27 20:54:18,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:18,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017357961] [2024-06-27 20:54:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:18,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:18,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:21,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:21,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017357961] [2024-06-27 20:54:21,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017357961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:21,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:21,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:21,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434465728] [2024-06-27 20:54:21,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:21,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:21,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:21,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:21,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 590 transitions, 7757 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:21,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:21,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:21,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:23,978 INFO L124 PetriNetUnfolderBase]: 4666/7576 cut-off events. [2024-06-27 20:54:23,978 INFO L125 PetriNetUnfolderBase]: For 826304/826306 co-relation queries the response was YES. [2024-06-27 20:54:24,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53863 conditions, 7576 events. 4666/7576 cut-off events. For 826304/826306 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 50394 event pairs, 958 based on Foata normal form. 2/7550 useless extension candidates. Maximal degree in co-relation 53696. Up to 5229 conditions per place. [2024-06-27 20:54:24,086 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 253 selfloop transitions, 370 changer transitions 0/628 dead transitions. [2024-06-27 20:54:24,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 628 transitions, 10276 flow [2024-06-27 20:54:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:54:24,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:54:24,087 INFO L175 Difference]: Start difference. First operand has 350 places, 590 transitions, 7757 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:54:24,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 628 transitions, 10276 flow [2024-06-27 20:54:27,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 628 transitions, 10039 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:27,748 INFO L231 Difference]: Finished difference. Result has 353 places, 599 transitions, 8521 flow [2024-06-27 20:54:27,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7520, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8521, PETRI_PLACES=353, PETRI_TRANSITIONS=599} [2024-06-27 20:54:27,749 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 20:54:27,749 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 599 transitions, 8521 flow [2024-06-27 20:54:27,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:27,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:27,749 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] [2024-06-27 20:54:27,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:54:27,749 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:27,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1633662959, now seen corresponding path program 15 times [2024-06-27 20:54:27,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:27,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944889273] [2024-06-27 20:54:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:27,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:30,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:30,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944889273] [2024-06-27 20:54:30,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944889273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:30,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:30,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160283960] [2024-06-27 20:54:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:30,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:30,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:30,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:30,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 599 transitions, 8521 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:30,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:30,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:30,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:33,141 INFO L124 PetriNetUnfolderBase]: 4692/7681 cut-off events. [2024-06-27 20:54:33,141 INFO L125 PetriNetUnfolderBase]: For 856964/856966 co-relation queries the response was YES. [2024-06-27 20:54:33,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55433 conditions, 7681 events. 4692/7681 cut-off events. For 856964/856966 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51619 event pairs, 886 based on Foata normal form. 2/7663 useless extension candidates. Maximal degree in co-relation 55265. Up to 6099 conditions per place. [2024-06-27 20:54:33,248 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 264 changer transitions 0/635 dead transitions. [2024-06-27 20:54:33,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 635 transitions, 10411 flow [2024-06-27 20:54:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:54:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:54:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 20:54:33,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:54:33,249 INFO L175 Difference]: Start difference. First operand has 353 places, 599 transitions, 8521 flow. Second operand 10 states and 170 transitions. [2024-06-27 20:54:33,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 635 transitions, 10411 flow [2024-06-27 20:54:37,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 635 transitions, 9725 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 20:54:37,395 INFO L231 Difference]: Finished difference. Result has 359 places, 605 transitions, 8443 flow [2024-06-27 20:54:37,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8443, PETRI_PLACES=359, PETRI_TRANSITIONS=605} [2024-06-27 20:54:37,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-27 20:54:37,396 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 605 transitions, 8443 flow [2024-06-27 20:54:37,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:37,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:37,396 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] [2024-06-27 20:54:37,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:54:37,396 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:37,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash -989913634, now seen corresponding path program 11 times [2024-06-27 20:54:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:37,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775203788] [2024-06-27 20:54:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:37,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:40,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:40,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:40,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775203788] [2024-06-27 20:54:40,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775203788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:40,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:40,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:40,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899958913] [2024-06-27 20:54:40,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:40,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:40,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:40,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:40,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:40,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 605 transitions, 8443 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:40,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:40,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:40,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:42,755 INFO L124 PetriNetUnfolderBase]: 4686/7630 cut-off events. [2024-06-27 20:54:42,755 INFO L125 PetriNetUnfolderBase]: For 856152/856154 co-relation queries the response was YES. [2024-06-27 20:54:42,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54751 conditions, 7630 events. 4686/7630 cut-off events. For 856152/856154 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 50885 event pairs, 979 based on Foata normal form. 2/7608 useless extension candidates. Maximal degree in co-relation 54582. Up to 5241 conditions per place. [2024-06-27 20:54:42,865 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 248 selfloop transitions, 380 changer transitions 0/633 dead transitions. [2024-06-27 20:54:42,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 633 transitions, 10491 flow [2024-06-27 20:54:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:54:42,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:54:42,867 INFO L175 Difference]: Start difference. First operand has 359 places, 605 transitions, 8443 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:54:42,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 633 transitions, 10491 flow [2024-06-27 20:54:46,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 633 transitions, 10067 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:46,632 INFO L231 Difference]: Finished difference. Result has 362 places, 605 transitions, 8785 flow [2024-06-27 20:54:46,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8785, PETRI_PLACES=362, PETRI_TRANSITIONS=605} [2024-06-27 20:54:46,633 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-27 20:54:46,633 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 605 transitions, 8785 flow [2024-06-27 20:54:46,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:46,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:46,633 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] [2024-06-27 20:54:46,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:54:46,633 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:46,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash 998335697, now seen corresponding path program 16 times [2024-06-27 20:54:46,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:46,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760659584] [2024-06-27 20:54:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:46,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:49,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:49,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760659584] [2024-06-27 20:54:49,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760659584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:49,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:49,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500303629] [2024-06-27 20:54:49,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:49,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:49,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:49,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:49,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:49,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:49,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 605 transitions, 8785 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:49,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:49,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:49,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:54:52,075 INFO L124 PetriNetUnfolderBase]: 4680/7660 cut-off events. [2024-06-27 20:54:52,075 INFO L125 PetriNetUnfolderBase]: For 859126/859128 co-relation queries the response was YES. [2024-06-27 20:54:52,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55151 conditions, 7660 events. 4680/7660 cut-off events. For 859126/859128 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 51463 event pairs, 915 based on Foata normal form. 2/7642 useless extension candidates. Maximal degree in co-relation 54980. Up to 6086 conditions per place. [2024-06-27 20:54:52,187 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 262 changer transitions 0/632 dead transitions. [2024-06-27 20:54:52,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 632 transitions, 10355 flow [2024-06-27 20:54:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:54:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:54:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:54:52,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:54:52,189 INFO L175 Difference]: Start difference. First operand has 362 places, 605 transitions, 8785 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:54:52,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 632 transitions, 10355 flow [2024-06-27 20:54:55,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 632 transitions, 9698 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:54:55,813 INFO L231 Difference]: Finished difference. Result has 365 places, 605 transitions, 8658 flow [2024-06-27 20:54:55,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8128, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8658, PETRI_PLACES=365, PETRI_TRANSITIONS=605} [2024-06-27 20:54:55,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-27 20:54:55,814 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 605 transitions, 8658 flow [2024-06-27 20:54:55,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:55,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:54:55,814 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] [2024-06-27 20:54:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:54:55,814 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:54:55,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:54:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -218879438, now seen corresponding path program 12 times [2024-06-27 20:54:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:54:55,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620078678] [2024-06-27 20:54:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:54:55,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:54:55,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:54:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:54:58,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:54:58,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620078678] [2024-06-27 20:54:58,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620078678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:54:58,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:54:58,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:54:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243607722] [2024-06-27 20:54:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:54:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:54:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:54:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:54:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:54:58,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:54:58,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 605 transitions, 8658 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:54:58,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:54:58,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:54:58,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:01,609 INFO L124 PetriNetUnfolderBase]: 4674/7615 cut-off events. [2024-06-27 20:55:01,609 INFO L125 PetriNetUnfolderBase]: For 858533/858535 co-relation queries the response was YES. [2024-06-27 20:55:01,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54514 conditions, 7615 events. 4674/7615 cut-off events. For 858533/858535 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 50802 event pairs, 994 based on Foata normal form. 2/7593 useless extension candidates. Maximal degree in co-relation 54342. Up to 5235 conditions per place. [2024-06-27 20:55:01,711 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 253 selfloop transitions, 374 changer transitions 0/632 dead transitions. [2024-06-27 20:55:01,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 632 transitions, 10470 flow [2024-06-27 20:55:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:55:01,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:55:01,712 INFO L175 Difference]: Start difference. First operand has 365 places, 605 transitions, 8658 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:55:01,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 632 transitions, 10470 flow [2024-06-27 20:55:04,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 632 transitions, 9883 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 20:55:04,857 INFO L231 Difference]: Finished difference. Result has 366 places, 605 transitions, 8825 flow [2024-06-27 20:55:04,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8071, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8825, PETRI_PLACES=366, PETRI_TRANSITIONS=605} [2024-06-27 20:55:04,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-27 20:55:04,858 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 605 transitions, 8825 flow [2024-06-27 20:55:04,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:04,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:04,858 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] [2024-06-27 20:55:04,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:55:04,858 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:04,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:04,859 INFO L85 PathProgramCache]: Analyzing trace with hash 382586724, now seen corresponding path program 7 times [2024-06-27 20:55:04,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:04,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407068434] [2024-06-27 20:55:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:04,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:07,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:07,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407068434] [2024-06-27 20:55:07,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407068434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:07,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:07,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:07,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817818961] [2024-06-27 20:55:07,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:07,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:07,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:07,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:07,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 605 transitions, 8825 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:07,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:07,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:07,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:10,161 INFO L124 PetriNetUnfolderBase]: 4682/7727 cut-off events. [2024-06-27 20:55:10,161 INFO L125 PetriNetUnfolderBase]: For 870528/870561 co-relation queries the response was YES. [2024-06-27 20:55:10,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55167 conditions, 7727 events. 4682/7727 cut-off events. For 870528/870561 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 52373 event pairs, 855 based on Foata normal form. 18/7726 useless extension candidates. Maximal degree in co-relation 54994. Up to 6738 conditions per place. [2024-06-27 20:55:10,272 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 536 selfloop transitions, 84 changer transitions 0/625 dead transitions. [2024-06-27 20:55:10,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 625 transitions, 10174 flow [2024-06-27 20:55:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:55:10,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 20:55:10,273 INFO L175 Difference]: Start difference. First operand has 366 places, 605 transitions, 8825 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:55:10,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 625 transitions, 10174 flow [2024-06-27 20:55:14,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 625 transitions, 9361 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-27 20:55:14,573 INFO L231 Difference]: Finished difference. Result has 365 places, 607 transitions, 8250 flow [2024-06-27 20:55:14,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8012, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8250, PETRI_PLACES=365, PETRI_TRANSITIONS=607} [2024-06-27 20:55:14,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-27 20:55:14,574 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 607 transitions, 8250 flow [2024-06-27 20:55:14,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:14,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:14,574 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, 1] [2024-06-27 20:55:14,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:55:14,574 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:14,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:14,575 INFO L85 PathProgramCache]: Analyzing trace with hash 317787764, now seen corresponding path program 8 times [2024-06-27 20:55:14,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:14,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850812194] [2024-06-27 20:55:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:14,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:17,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:17,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850812194] [2024-06-27 20:55:17,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850812194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:17,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299272304] [2024-06-27 20:55:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:17,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:17,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:17,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 607 transitions, 8250 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:17,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:17,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:20,118 INFO L124 PetriNetUnfolderBase]: 4726/7795 cut-off events. [2024-06-27 20:55:20,118 INFO L125 PetriNetUnfolderBase]: For 952955/952988 co-relation queries the response was YES. [2024-06-27 20:55:20,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54639 conditions, 7795 events. 4726/7795 cut-off events. For 952955/952988 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 52881 event pairs, 877 based on Foata normal form. 28/7804 useless extension candidates. Maximal degree in co-relation 54465. Up to 6764 conditions per place. [2024-06-27 20:55:20,230 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 550 selfloop transitions, 76 changer transitions 0/631 dead transitions. [2024-06-27 20:55:20,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 631 transitions, 9655 flow [2024-06-27 20:55:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:55:20,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 20:55:20,231 INFO L175 Difference]: Start difference. First operand has 365 places, 607 transitions, 8250 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:55:20,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 631 transitions, 9655 flow [2024-06-27 20:55:24,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 631 transitions, 9440 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:24,286 INFO L231 Difference]: Finished difference. Result has 367 places, 609 transitions, 8262 flow [2024-06-27 20:55:24,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8262, PETRI_PLACES=367, PETRI_TRANSITIONS=609} [2024-06-27 20:55:24,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 20:55:24,286 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 609 transitions, 8262 flow [2024-06-27 20:55:24,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:24,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:24,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:24,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:55:24,286 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:24,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash 704179316, now seen corresponding path program 9 times [2024-06-27 20:55:24,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:24,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279070021] [2024-06-27 20:55:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:24,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:27,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:27,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279070021] [2024-06-27 20:55:27,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279070021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:27,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:27,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:27,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769474389] [2024-06-27 20:55:27,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:27,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:27,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:27,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:27,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:27,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 609 transitions, 8262 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:27,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:27,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:27,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:29,479 INFO L124 PetriNetUnfolderBase]: 4691/7740 cut-off events. [2024-06-27 20:55:29,479 INFO L125 PetriNetUnfolderBase]: For 872668/872701 co-relation queries the response was YES. [2024-06-27 20:55:29,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52834 conditions, 7740 events. 4691/7740 cut-off events. For 872668/872701 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 52448 event pairs, 844 based on Foata normal form. 28/7749 useless extension candidates. Maximal degree in co-relation 52659. Up to 6473 conditions per place. [2024-06-27 20:55:29,582 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 549 selfloop transitions, 81 changer transitions 0/635 dead transitions. [2024-06-27 20:55:29,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 635 transitions, 9650 flow [2024-06-27 20:55:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:55:29,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:55:29,583 INFO L175 Difference]: Start difference. First operand has 367 places, 609 transitions, 8262 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:55:29,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 635 transitions, 9650 flow [2024-06-27 20:55:33,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 635 transitions, 9426 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:33,764 INFO L231 Difference]: Finished difference. Result has 369 places, 609 transitions, 8207 flow [2024-06-27 20:55:33,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8038, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8207, PETRI_PLACES=369, PETRI_TRANSITIONS=609} [2024-06-27 20:55:33,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 20:55:33,765 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 609 transitions, 8207 flow [2024-06-27 20:55:33,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:33,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:33,765 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] [2024-06-27 20:55:33,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:55:33,765 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:33,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1519908178, now seen corresponding path program 10 times [2024-06-27 20:55:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:33,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397917392] [2024-06-27 20:55:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:36,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:36,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397917392] [2024-06-27 20:55:36,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397917392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:36,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:36,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:36,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971052828] [2024-06-27 20:55:36,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:36,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:36,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:36,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:36,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:36,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:36,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 609 transitions, 8207 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:36,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:36,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:36,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:38,999 INFO L124 PetriNetUnfolderBase]: 4699/7752 cut-off events. [2024-06-27 20:55:38,999 INFO L125 PetriNetUnfolderBase]: For 807045/807078 co-relation queries the response was YES. [2024-06-27 20:55:39,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52815 conditions, 7752 events. 4699/7752 cut-off events. For 807045/807078 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 52633 event pairs, 860 based on Foata normal form. 18/7751 useless extension candidates. Maximal degree in co-relation 52639. Up to 6647 conditions per place. [2024-06-27 20:55:39,307 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 537 selfloop transitions, 91 changer transitions 0/633 dead transitions. [2024-06-27 20:55:39,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 633 transitions, 9610 flow [2024-06-27 20:55:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:55:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:55:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:55:39,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:55:39,308 INFO L175 Difference]: Start difference. First operand has 369 places, 609 transitions, 8207 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:55:39,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 633 transitions, 9610 flow [2024-06-27 20:55:43,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 633 transitions, 9419 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 20:55:43,225 INFO L231 Difference]: Finished difference. Result has 370 places, 611 transitions, 8266 flow [2024-06-27 20:55:43,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8016, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8266, PETRI_PLACES=370, PETRI_TRANSITIONS=611} [2024-06-27 20:55:43,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 20:55:43,226 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 611 transitions, 8266 flow [2024-06-27 20:55:43,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:43,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:43,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:55:43,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:55:43,226 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:43,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1563846498, now seen corresponding path program 13 times [2024-06-27 20:55:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:43,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853158834] [2024-06-27 20:55:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:43,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853158834] [2024-06-27 20:55:46,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853158834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:46,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:46,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:46,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115115082] [2024-06-27 20:55:46,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:46,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:46,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:46,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:46,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:46,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:46,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 611 transitions, 8266 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:46,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:46,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:46,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:48,798 INFO L124 PetriNetUnfolderBase]: 4725/7802 cut-off events. [2024-06-27 20:55:48,799 INFO L125 PetriNetUnfolderBase]: For 838016/838049 co-relation queries the response was YES. [2024-06-27 20:55:48,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53494 conditions, 7802 events. 4725/7802 cut-off events. For 838016/838049 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 52993 event pairs, 1059 based on Foata normal form. 2/7781 useless extension candidates. Maximal degree in co-relation 53317. Up to 5289 conditions per place. [2024-06-27 20:55:48,916 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 277 selfloop transitions, 357 changer transitions 0/639 dead transitions. [2024-06-27 20:55:48,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 639 transitions, 10530 flow [2024-06-27 20:55:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:55:48,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:55:48,918 INFO L175 Difference]: Start difference. First operand has 370 places, 611 transitions, 8266 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:55:48,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 639 transitions, 10530 flow [2024-06-27 20:55:53,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 639 transitions, 10303 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:55:53,055 INFO L231 Difference]: Finished difference. Result has 373 places, 617 transitions, 8941 flow [2024-06-27 20:55:53,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8039, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8941, PETRI_PLACES=373, PETRI_TRANSITIONS=617} [2024-06-27 20:55:53,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-27 20:55:53,055 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 617 transitions, 8941 flow [2024-06-27 20:55:53,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:53,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:55:53,056 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] [2024-06-27 20:55:53,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:55:53,056 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:55:53,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:55:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash 309506610, now seen corresponding path program 14 times [2024-06-27 20:55:53,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:55:53,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264254782] [2024-06-27 20:55:53,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:55:53,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:55:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:55:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:55:56,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:55:56,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264254782] [2024-06-27 20:55:56,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264254782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:55:56,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:55:56,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:55:56,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767900413] [2024-06-27 20:55:56,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:55:56,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:55:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:55:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:55:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:55:56,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:55:56,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 617 transitions, 8941 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:55:56,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:55:56,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:55:56,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:55:58,849 INFO L124 PetriNetUnfolderBase]: 4729/7812 cut-off events. [2024-06-27 20:55:58,849 INFO L125 PetriNetUnfolderBase]: For 856104/856137 co-relation queries the response was YES. [2024-06-27 20:55:58,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54244 conditions, 7812 events. 4729/7812 cut-off events. For 856104/856137 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 53153 event pairs, 1045 based on Foata normal form. 4/7793 useless extension candidates. Maximal degree in co-relation 54066. Up to 5290 conditions per place. [2024-06-27 20:55:58,958 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 290 selfloop transitions, 346 changer transitions 0/641 dead transitions. [2024-06-27 20:55:58,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 641 transitions, 10872 flow [2024-06-27 20:55:58,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:55:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:55:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:55:58,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:55:58,959 INFO L175 Difference]: Start difference. First operand has 373 places, 617 transitions, 8941 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:55:58,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 641 transitions, 10872 flow [2024-06-27 20:56:03,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 641 transitions, 9896 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 20:56:03,542 INFO L231 Difference]: Finished difference. Result has 374 places, 620 transitions, 8763 flow [2024-06-27 20:56:03,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7981, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8763, PETRI_PLACES=374, PETRI_TRANSITIONS=620} [2024-06-27 20:56:03,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 20:56:03,543 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 620 transitions, 8763 flow [2024-06-27 20:56:03,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:03,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:03,543 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] [2024-06-27 20:56:03,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:56:03,543 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:03,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash 309506393, now seen corresponding path program 17 times [2024-06-27 20:56:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147858973] [2024-06-27 20:56:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:03,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:06,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:06,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147858973] [2024-06-27 20:56:06,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147858973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:06,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:06,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:06,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016672687] [2024-06-27 20:56:06,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:06,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:06,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:06,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:56:06,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 620 transitions, 8763 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:06,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:06,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:56:06,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:09,191 INFO L124 PetriNetUnfolderBase]: 4739/7828 cut-off events. [2024-06-27 20:56:09,191 INFO L125 PetriNetUnfolderBase]: For 844351/844384 co-relation queries the response was YES. [2024-06-27 20:56:09,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54039 conditions, 7828 events. 4739/7828 cut-off events. For 844351/844384 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 53276 event pairs, 944 based on Foata normal form. 4/7811 useless extension candidates. Maximal degree in co-relation 53860. Up to 6169 conditions per place. [2024-06-27 20:56:09,290 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 241 changer transitions 0/644 dead transitions. [2024-06-27 20:56:09,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 644 transitions, 10395 flow [2024-06-27 20:56:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 20:56:09,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-27 20:56:09,292 INFO L175 Difference]: Start difference. First operand has 374 places, 620 transitions, 8763 flow. Second operand 9 states and 150 transitions. [2024-06-27 20:56:09,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 644 transitions, 10395 flow [2024-06-27 20:56:13,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 644 transitions, 9431 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:56:13,077 INFO L231 Difference]: Finished difference. Result has 376 places, 623 transitions, 8329 flow [2024-06-27 20:56:13,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7801, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8329, PETRI_PLACES=376, PETRI_TRANSITIONS=623} [2024-06-27 20:56:13,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-27 20:56:13,078 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 623 transitions, 8329 flow [2024-06-27 20:56:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:13,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:13,078 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] [2024-06-27 20:56:13,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:56:13,078 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:13,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1287175129, now seen corresponding path program 18 times [2024-06-27 20:56:13,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:13,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485803227] [2024-06-27 20:56:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:13,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:15,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:15,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485803227] [2024-06-27 20:56:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485803227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:15,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:15,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772868725] [2024-06-27 20:56:15,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:15,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:15,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:15,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:15,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:56:15,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 623 transitions, 8329 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:15,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:15,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:56:15,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:18,487 INFO L124 PetriNetUnfolderBase]: 4749/7846 cut-off events. [2024-06-27 20:56:18,487 INFO L125 PetriNetUnfolderBase]: For 853883/853916 co-relation queries the response was YES. [2024-06-27 20:56:18,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52795 conditions, 7846 events. 4749/7846 cut-off events. For 853883/853916 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 53385 event pairs, 942 based on Foata normal form. 4/7829 useless extension candidates. Maximal degree in co-relation 52616. Up to 6179 conditions per place. [2024-06-27 20:56:18,602 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 257 changer transitions 0/649 dead transitions. [2024-06-27 20:56:18,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 649 transitions, 9981 flow [2024-06-27 20:56:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:56:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:56:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-27 20:56:18,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-27 20:56:18,604 INFO L175 Difference]: Start difference. First operand has 376 places, 623 transitions, 8329 flow. Second operand 10 states and 162 transitions. [2024-06-27 20:56:18,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 649 transitions, 9981 flow [2024-06-27 20:56:22,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 649 transitions, 9531 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:22,067 INFO L231 Difference]: Finished difference. Result has 380 places, 626 transitions, 8445 flow [2024-06-27 20:56:22,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7882, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8445, PETRI_PLACES=380, PETRI_TRANSITIONS=626} [2024-06-27 20:56:22,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 20:56:22,068 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 626 transitions, 8445 flow [2024-06-27 20:56:22,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:22,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:22,068 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] [2024-06-27 20:56:22,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:56:22,068 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:22,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:22,069 INFO L85 PathProgramCache]: Analyzing trace with hash 453396923, now seen corresponding path program 19 times [2024-06-27 20:56:22,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:22,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862312886] [2024-06-27 20:56:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:22,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:24,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:24,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862312886] [2024-06-27 20:56:24,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862312886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:24,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:24,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:24,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483678308] [2024-06-27 20:56:24,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:24,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:24,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:24,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:24,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:24,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:56:24,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 626 transitions, 8445 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:24,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:24,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:56:24,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:27,580 INFO L124 PetriNetUnfolderBase]: 4743/7824 cut-off events. [2024-06-27 20:56:27,580 INFO L125 PetriNetUnfolderBase]: For 849539/849572 co-relation queries the response was YES. [2024-06-27 20:56:27,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52665 conditions, 7824 events. 4743/7824 cut-off events. For 849539/849572 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 53107 event pairs, 944 based on Foata normal form. 4/7807 useless extension candidates. Maximal degree in co-relation 52485. Up to 6174 conditions per place. [2024-06-27 20:56:27,694 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 254 changer transitions 0/646 dead transitions. [2024-06-27 20:56:27,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 646 transitions, 9779 flow [2024-06-27 20:56:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:56:27,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 20:56:27,695 INFO L175 Difference]: Start difference. First operand has 380 places, 626 transitions, 8445 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:56:27,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 646 transitions, 9779 flow [2024-06-27 20:56:32,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 646 transitions, 9044 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:56:32,172 INFO L231 Difference]: Finished difference. Result has 380 places, 626 transitions, 8224 flow [2024-06-27 20:56:32,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7710, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8224, PETRI_PLACES=380, PETRI_TRANSITIONS=626} [2024-06-27 20:56:32,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 20:56:32,172 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 626 transitions, 8224 flow [2024-06-27 20:56:32,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:32,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:32,172 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] [2024-06-27 20:56:32,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:56:32,173 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:32,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1513234994, now seen corresponding path program 15 times [2024-06-27 20:56:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:32,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615401037] [2024-06-27 20:56:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:32,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:35,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:35,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615401037] [2024-06-27 20:56:35,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615401037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:35,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:35,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:35,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493084223] [2024-06-27 20:56:35,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:35,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:35,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:35,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:56:35,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 626 transitions, 8224 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:35,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:35,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:56:35,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:37,770 INFO L124 PetriNetUnfolderBase]: 4737/7816 cut-off events. [2024-06-27 20:56:37,770 INFO L125 PetriNetUnfolderBase]: For 840823/840856 co-relation queries the response was YES. [2024-06-27 20:56:37,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52149 conditions, 7816 events. 4737/7816 cut-off events. For 840823/840856 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 53018 event pairs, 1056 based on Foata normal form. 2/7795 useless extension candidates. Maximal degree in co-relation 51969. Up to 5296 conditions per place. [2024-06-27 20:56:38,090 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 274 selfloop transitions, 368 changer transitions 0/647 dead transitions. [2024-06-27 20:56:38,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 647 transitions, 10086 flow [2024-06-27 20:56:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:56:38,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:56:38,092 INFO L175 Difference]: Start difference. First operand has 380 places, 626 transitions, 8224 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:56:38,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 647 transitions, 10086 flow [2024-06-27 20:56:42,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 647 transitions, 9444 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-27 20:56:42,526 INFO L231 Difference]: Finished difference. Result has 379 places, 626 transitions, 8324 flow [2024-06-27 20:56:42,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8324, PETRI_PLACES=379, PETRI_TRANSITIONS=626} [2024-06-27 20:56:42,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 20:56:42,527 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 626 transitions, 8324 flow [2024-06-27 20:56:42,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:42,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:42,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:42,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:56:42,527 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:42,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1505616434, now seen corresponding path program 16 times [2024-06-27 20:56:42,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:42,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709532802] [2024-06-27 20:56:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:42,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:45,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:45,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709532802] [2024-06-27 20:56:45,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709532802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:45,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:45,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:45,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778886107] [2024-06-27 20:56:45,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:45,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:45,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:45,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:45,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:45,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:56:45,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 626 transitions, 8324 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:45,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:45,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:56:45,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:48,620 INFO L124 PetriNetUnfolderBase]: 4731/7820 cut-off events. [2024-06-27 20:56:48,620 INFO L125 PetriNetUnfolderBase]: For 835273/835306 co-relation queries the response was YES. [2024-06-27 20:56:48,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52118 conditions, 7820 events. 4731/7820 cut-off events. For 835273/835306 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 53223 event pairs, 1062 based on Foata normal form. 2/7799 useless extension candidates. Maximal degree in co-relation 51937. Up to 5293 conditions per place. [2024-06-27 20:56:48,749 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 280 selfloop transitions, 361 changer transitions 0/646 dead transitions. [2024-06-27 20:56:48,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 646 transitions, 9920 flow [2024-06-27 20:56:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:56:48,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:56:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:56:48,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:56:48,750 INFO L175 Difference]: Start difference. First operand has 379 places, 626 transitions, 8324 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:56:48,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 646 transitions, 9920 flow [2024-06-27 20:56:54,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 646 transitions, 9147 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:56:54,197 INFO L231 Difference]: Finished difference. Result has 381 places, 626 transitions, 8279 flow [2024-06-27 20:56:54,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7551, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8279, PETRI_PLACES=381, PETRI_TRANSITIONS=626} [2024-06-27 20:56:54,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-27 20:56:54,198 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 626 transitions, 8279 flow [2024-06-27 20:56:54,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:54,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:54,198 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] [2024-06-27 20:56:54,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:56:54,198 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:54,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:54,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1166589266, now seen corresponding path program 11 times [2024-06-27 20:56:54,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:54,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352266305] [2024-06-27 20:56:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:54,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:57,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:57,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:57,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352266305] [2024-06-27 20:56:57,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352266305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:57,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:57,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:57,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929268329] [2024-06-27 20:56:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:57,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:57,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:57,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:56:57,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 626 transitions, 8279 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:57,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:57,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:56:57,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:59,468 INFO L124 PetriNetUnfolderBase]: 4739/7814 cut-off events. [2024-06-27 20:56:59,469 INFO L125 PetriNetUnfolderBase]: For 846656/846689 co-relation queries the response was YES. [2024-06-27 20:56:59,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52221 conditions, 7814 events. 4739/7814 cut-off events. For 846656/846689 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 52913 event pairs, 802 based on Foata normal form. 18/7813 useless extension candidates. Maximal degree in co-relation 52039. Up to 5876 conditions per place. [2024-06-27 20:56:59,589 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 546 selfloop transitions, 104 changer transitions 0/655 dead transitions. [2024-06-27 20:56:59,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 655 transitions, 10040 flow [2024-06-27 20:56:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:56:59,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:56:59,590 INFO L175 Difference]: Start difference. First operand has 381 places, 626 transitions, 8279 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:56:59,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 655 transitions, 10040 flow [2024-06-27 20:57:04,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 655 transitions, 9237 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:57:04,831 INFO L231 Difference]: Finished difference. Result has 379 places, 628 transitions, 7752 flow [2024-06-27 20:57:04,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7476, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7752, PETRI_PLACES=379, PETRI_TRANSITIONS=628} [2024-06-27 20:57:04,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 20:57:04,832 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 628 transitions, 7752 flow [2024-06-27 20:57:04,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:04,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:04,832 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] [2024-06-27 20:57:04,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:57:04,833 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:04,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:04,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1160875346, now seen corresponding path program 12 times [2024-06-27 20:57:04,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:04,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210775202] [2024-06-27 20:57:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:04,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:07,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:07,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210775202] [2024-06-27 20:57:07,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210775202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:07,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:07,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:07,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220299901] [2024-06-27 20:57:07,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:07,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:07,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:07,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:57:07,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 628 transitions, 7752 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:07,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:07,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:57:07,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:10,157 INFO L124 PetriNetUnfolderBase]: 4714/7773 cut-off events. [2024-06-27 20:57:10,157 INFO L125 PetriNetUnfolderBase]: For 836136/836169 co-relation queries the response was YES. [2024-06-27 20:57:10,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50229 conditions, 7773 events. 4714/7773 cut-off events. For 836136/836169 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 52750 event pairs, 823 based on Foata normal form. 24/7778 useless extension candidates. Maximal degree in co-relation 50047. Up to 5862 conditions per place. [2024-06-27 20:57:10,274 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 553 selfloop transitions, 96 changer transitions 0/654 dead transitions. [2024-06-27 20:57:10,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 654 transitions, 9166 flow [2024-06-27 20:57:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:57:10,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:57:10,276 INFO L175 Difference]: Start difference. First operand has 379 places, 628 transitions, 7752 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:57:10,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 654 transitions, 9166 flow [2024-06-27 20:57:13,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 654 transitions, 8881 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:13,959 INFO L231 Difference]: Finished difference. Result has 382 places, 628 transitions, 7665 flow [2024-06-27 20:57:13,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7467, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7665, PETRI_PLACES=382, PETRI_TRANSITIONS=628} [2024-06-27 20:57:13,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-27 20:57:13,959 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 628 transitions, 7665 flow [2024-06-27 20:57:13,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:13,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:13,960 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] [2024-06-27 20:57:13,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:57:13,960 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:13,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash -286980844, now seen corresponding path program 1 times [2024-06-27 20:57:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:13,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538981973] [2024-06-27 20:57:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:16,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:16,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538981973] [2024-06-27 20:57:16,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538981973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:16,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:16,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:16,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387524778] [2024-06-27 20:57:16,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:16,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:16,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:16,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:16,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:57:16,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 628 transitions, 7665 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:16,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:16,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:57:16,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:19,573 INFO L124 PetriNetUnfolderBase]: 4801/7912 cut-off events. [2024-06-27 20:57:19,573 INFO L125 PetriNetUnfolderBase]: For 944207/944209 co-relation queries the response was YES. [2024-06-27 20:57:19,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52674 conditions, 7912 events. 4801/7912 cut-off events. For 944207/944209 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 53828 event pairs, 1119 based on Foata normal form. 8/7917 useless extension candidates. Maximal degree in co-relation 52491. Up to 7196 conditions per place. [2024-06-27 20:57:19,676 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 646 selfloop transitions, 21 changer transitions 0/672 dead transitions. [2024-06-27 20:57:19,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 672 transitions, 9511 flow [2024-06-27 20:57:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:57:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:57:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:57:19,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:57:19,677 INFO L175 Difference]: Start difference. First operand has 382 places, 628 transitions, 7665 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:57:19,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 672 transitions, 9511 flow [2024-06-27 20:57:23,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 672 transitions, 9291 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:57:23,331 INFO L231 Difference]: Finished difference. Result has 384 places, 630 transitions, 7569 flow [2024-06-27 20:57:23,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7445, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7569, PETRI_PLACES=384, PETRI_TRANSITIONS=630} [2024-06-27 20:57:23,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 20:57:23,332 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 630 transitions, 7569 flow [2024-06-27 20:57:23,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:23,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:23,332 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] [2024-06-27 20:57:23,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:57:23,332 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:23,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1160011498, now seen corresponding path program 2 times [2024-06-27 20:57:23,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:23,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946165213] [2024-06-27 20:57:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:23,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:26,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:26,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946165213] [2024-06-27 20:57:26,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946165213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:26,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:26,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:26,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922377696] [2024-06-27 20:57:26,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:26,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:26,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:26,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:26,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:26,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:57:26,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 630 transitions, 7569 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:26,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:26,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:57:26,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:28,607 INFO L124 PetriNetUnfolderBase]: 4778/7879 cut-off events. [2024-06-27 20:57:28,607 INFO L125 PetriNetUnfolderBase]: For 880788/880790 co-relation queries the response was YES. [2024-06-27 20:57:28,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50495 conditions, 7879 events. 4778/7879 cut-off events. For 880788/880790 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 53630 event pairs, 1142 based on Foata normal form. 10/7886 useless extension candidates. Maximal degree in co-relation 50311. Up to 7240 conditions per place. [2024-06-27 20:57:28,719 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 639 selfloop transitions, 18 changer transitions 0/662 dead transitions. [2024-06-27 20:57:28,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 662 transitions, 9001 flow [2024-06-27 20:57:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:57:28,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:57:28,720 INFO L175 Difference]: Start difference. First operand has 384 places, 630 transitions, 7569 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:57:28,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 662 transitions, 9001 flow [2024-06-27 20:57:32,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 662 transitions, 8931 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:32,874 INFO L231 Difference]: Finished difference. Result has 387 places, 630 transitions, 7540 flow [2024-06-27 20:57:32,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7499, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7540, PETRI_PLACES=387, PETRI_TRANSITIONS=630} [2024-06-27 20:57:32,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 20:57:32,875 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 630 transitions, 7540 flow [2024-06-27 20:57:32,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:32,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:32,875 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] [2024-06-27 20:57:32,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:57:32,875 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:32,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash -376890092, now seen corresponding path program 3 times [2024-06-27 20:57:32,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:32,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631798643] [2024-06-27 20:57:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:32,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:35,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631798643] [2024-06-27 20:57:35,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631798643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:35,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:35,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534771672] [2024-06-27 20:57:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:35,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:35,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:35,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:35,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:57:35,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 630 transitions, 7540 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:35,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:35,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:57:35,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15