./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 02:08:32,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:08:32,351 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:08:32,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:08:32,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:08:32,388 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:08:32,390 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:08:32,391 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:08:32,391 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:08:32,394 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:08:32,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:08:32,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:08:32,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:08:32,396 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:08:32,397 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:08:32,397 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:08:32,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:08:32,397 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:08:32,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:08:32,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:08:32,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:08:32,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:08:32,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:08:32,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:08:32,399 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:08:32,399 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:08:32,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:08:32,400 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:08:32,400 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:08:32,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:08:32,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:08:32,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:08:32,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:08:32,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:08:32,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:08:32,402 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:08:32,402 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:08:32,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:08:32,403 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:08:32,403 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:08:32,403 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:08:32,403 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:08:32,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:08:32,403 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-28 02:08:32,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:08:32,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:08:32,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:08:32,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:08:32,643 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:08:32,643 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-28 02:08:33,709 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:08:33,902 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:08:33,902 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-28 02:08:33,914 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b34f01201/a7d5636554cc4cf6968360c6a494cd5d/FLAGe12f5096d [2024-06-28 02:08:33,928 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b34f01201/a7d5636554cc4cf6968360c6a494cd5d [2024-06-28 02:08:33,930 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:08:33,930 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:08:33,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe025_rmo.yml/witness.yml [2024-06-28 02:08:34,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:08:34,136 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:08:34,138 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:08:34,139 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:08:34,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:08:34,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:08:33" (1/2) ... [2024-06-28 02:08:34,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9feb99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:08:34, skipping insertion in model container [2024-06-28 02:08:34,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:08:33" (1/2) ... [2024-06-28 02:08:34,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43b226ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:08:34, skipping insertion in model container [2024-06-28 02:08:34,145 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:08:34" (2/2) ... [2024-06-28 02:08:34,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9feb99 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34, skipping insertion in model container [2024-06-28 02:08:34,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:08:34" (2/2) ... [2024-06-28 02:08:34,146 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:08:34,325 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:08:34,325 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 02:08:34,326 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 02:08:34,326 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-28 02:08:34,326 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:08:34,326 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-28 02:08:34,350 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:08:34,486 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i[988,1001] [2024-06-28 02:08:34,648 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:08:34,655 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-28 02:08:34,686 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i[988,1001] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:08:34,835 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:08:34,862 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:08:34,863 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34 WrapperNode [2024-06-28 02:08:34,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:08:34,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:08:34,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:08:34,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:08:34,870 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 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,890 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 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,921 INFO L138 Inliner]: procedures = 175, calls = 108, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 277 [2024-06-28 02:08:34,921 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:08:34,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:08:34,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:08:34,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:08:34,930 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,935 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,950 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-28 02:08:34,950 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,951 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,964 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,970 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,972 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:08:34,985 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:08:34,985 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:08:34,985 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:08:34,986 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (1/1) ... [2024-06-28 02:08:34,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:08:35,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:08:35,042 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) [2024-06-28 02:08:35,079 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 [2024-06-28 02:08:35,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 02:08:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 02:08:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 02:08:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 02:08:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:08:35,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:08:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:08:35,094 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:08:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:08:35,094 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:08:35,094 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:08:35,094 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:08:35,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:08:35,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 02:08:35,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:08:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:08:35,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:08:35,098 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:08:35,251 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:08:35,253 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:08:35,719 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:08:35,719 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:08:36,188 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:08:36,188 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:08:36,189 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:08:36 BoogieIcfgContainer [2024-06-28 02:08:36,189 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:08:36,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:08:36,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:08:36,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:08:36,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:08:33" (1/4) ... [2024-06-28 02:08:36,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7b228a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:08:36, skipping insertion in model container [2024-06-28 02:08:36,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:08:34" (2/4) ... [2024-06-28 02:08:36,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7b228a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:08:36, skipping insertion in model container [2024-06-28 02:08:36,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:08:34" (3/4) ... [2024-06-28 02:08:36,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7b228a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:08:36, skipping insertion in model container [2024-06-28 02:08:36,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:08:36" (4/4) ... [2024-06-28 02:08:36,197 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_rmo.i [2024-06-28 02:08:36,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:08:36,213 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 02:08:36,213 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:08:36,273 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:08:36,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 48 transitions, 108 flow [2024-06-28 02:08:36,383 INFO L124 PetriNetUnfolderBase]: 1/45 cut-off events. [2024-06-28 02:08:36,383 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:08:36,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 45 events. 1/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2024-06-28 02:08:36,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 48 transitions, 108 flow [2024-06-28 02:08:36,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 42 transitions, 93 flow [2024-06-28 02:08:36,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:08:36,431 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;@50be3c9e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:08:36,431 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-28 02:08:36,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:08:36,436 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 02:08:36,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:08:36,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:36,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:08:36,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:36,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash 898804559, now seen corresponding path program 1 times [2024-06-28 02:08:36,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:36,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907701268] [2024-06-28 02:08:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:38,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:38,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907701268] [2024-06-28 02:08:38,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907701268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:38,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:38,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:08:38,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732591060] [2024-06-28 02:08:38,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:38,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:08:38,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:08:38,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:08:38,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-06-28 02:08:38,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:38,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:38,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-06-28 02:08:38,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:39,472 INFO L124 PetriNetUnfolderBase]: 3395/5430 cut-off events. [2024-06-28 02:08:39,472 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 02:08:39,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10425 conditions, 5430 events. 3395/5430 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 32506 event pairs, 2190 based on Foata normal form. 0/5244 useless extension candidates. Maximal degree in co-relation 10413. Up to 4904 conditions per place. [2024-06-28 02:08:39,503 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 45 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-28 02:08:39,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 233 flow [2024-06-28 02:08:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:08:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:08:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-28 02:08:39,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-28 02:08:39,515 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 93 flow. Second operand 3 states and 92 transitions. [2024-06-28 02:08:39,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 233 flow [2024-06-28 02:08:39,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:08:39,525 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 127 flow [2024-06-28 02:08:39,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 02:08:39,529 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-06-28 02:08:39,530 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 127 flow [2024-06-28 02:08:39,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:39,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:39,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:08:39,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:39,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash 462791886, now seen corresponding path program 1 times [2024-06-28 02:08:39,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:39,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153169160] [2024-06-28 02:08:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:39,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:41,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:41,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153169160] [2024-06-28 02:08:41,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153169160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:41,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:41,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:08:41,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780629834] [2024-06-28 02:08:41,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:41,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:08:41,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:41,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:08:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:08:41,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:08:41,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:41,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:41,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:08:41,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:42,035 INFO L124 PetriNetUnfolderBase]: 4064/6243 cut-off events. [2024-06-28 02:08:42,036 INFO L125 PetriNetUnfolderBase]: For 946/946 co-relation queries the response was YES. [2024-06-28 02:08:42,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13500 conditions, 6243 events. 4064/6243 cut-off events. For 946/946 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 36182 event pairs, 1864 based on Foata normal form. 6/6246 useless extension candidates. Maximal degree in co-relation 13488. Up to 5783 conditions per place. [2024-06-28 02:08:42,067 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 60 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-06-28 02:08:42,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 341 flow [2024-06-28 02:08:42,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:08:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:08:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-28 02:08:42,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:08:42,072 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 127 flow. Second operand 4 states and 120 transitions. [2024-06-28 02:08:42,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 341 flow [2024-06-28 02:08:42,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:08:42,076 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 173 flow [2024-06-28 02:08:42,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-28 02:08:42,077 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-28 02:08:42,077 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 173 flow [2024-06-28 02:08:42,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:42,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:42,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:42,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:08:42,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:42,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:42,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1572438988, now seen corresponding path program 1 times [2024-06-28 02:08:42,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:42,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109758495] [2024-06-28 02:08:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:42,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:45,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:45,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109758495] [2024-06-28 02:08:45,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109758495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:45,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:45,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:08:45,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472336522] [2024-06-28 02:08:45,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:45,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:08:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:08:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:08:45,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:08:45,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:45,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:45,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:08:45,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:46,401 INFO L124 PetriNetUnfolderBase]: 4055/6228 cut-off events. [2024-06-28 02:08:46,401 INFO L125 PetriNetUnfolderBase]: For 2664/2664 co-relation queries the response was YES. [2024-06-28 02:08:46,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14777 conditions, 6228 events. 4055/6228 cut-off events. For 2664/2664 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 36007 event pairs, 1406 based on Foata normal form. 6/6231 useless extension candidates. Maximal degree in co-relation 14763. Up to 5714 conditions per place. [2024-06-28 02:08:46,429 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 81 selfloop transitions, 16 changer transitions 0/105 dead transitions. [2024-06-28 02:08:46,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 514 flow [2024-06-28 02:08:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:08:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:08:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-28 02:08:46,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-28 02:08:46,432 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 173 flow. Second operand 6 states and 172 transitions. [2024-06-28 02:08:46,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 514 flow [2024-06-28 02:08:46,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 105 transitions, 486 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 02:08:46,435 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 233 flow [2024-06-28 02:08:46,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-28 02:08:46,436 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-28 02:08:46,436 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 233 flow [2024-06-28 02:08:46,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:46,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:46,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:46,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:08:46,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:46,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash -669034069, now seen corresponding path program 1 times [2024-06-28 02:08:46,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:46,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336288449] [2024-06-28 02:08:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:46,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:47,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:47,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336288449] [2024-06-28 02:08:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336288449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:47,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:47,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:08:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633349273] [2024-06-28 02:08:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:47,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:08:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:08:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:08:47,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:08:47,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:47,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:47,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:08:47,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:49,281 INFO L124 PetriNetUnfolderBase]: 3369/5417 cut-off events. [2024-06-28 02:08:49,282 INFO L125 PetriNetUnfolderBase]: For 4374/4374 co-relation queries the response was YES. [2024-06-28 02:08:49,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13803 conditions, 5417 events. 3369/5417 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32518 event pairs, 1315 based on Foata normal form. 2/5414 useless extension candidates. Maximal degree in co-relation 13786. Up to 4801 conditions per place. [2024-06-28 02:08:49,309 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 67 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-28 02:08:49,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 89 transitions, 507 flow [2024-06-28 02:08:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:08:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:08:49,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-28 02:08:49,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-28 02:08:49,312 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 233 flow. Second operand 5 states and 129 transitions. [2024-06-28 02:08:49,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 89 transitions, 507 flow [2024-06-28 02:08:49,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 469 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 02:08:49,319 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 296 flow [2024-06-28 02:08:49,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-28 02:08:49,320 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-06-28 02:08:49,321 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 296 flow [2024-06-28 02:08:49,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:49,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:49,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:49,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:08:49,322 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:49,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash 759747271, now seen corresponding path program 1 times [2024-06-28 02:08:49,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:49,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112632782] [2024-06-28 02:08:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:50,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:50,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112632782] [2024-06-28 02:08:50,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112632782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:50,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:50,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:08:50,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943075914] [2024-06-28 02:08:50,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:50,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:08:50,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:08:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:08:50,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:08:50,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:50,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:50,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:08:50,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:51,769 INFO L124 PetriNetUnfolderBase]: 3359/5401 cut-off events. [2024-06-28 02:08:51,770 INFO L125 PetriNetUnfolderBase]: For 6853/6856 co-relation queries the response was YES. [2024-06-28 02:08:51,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15039 conditions, 5401 events. 3359/5401 cut-off events. For 6853/6856 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 32542 event pairs, 1309 based on Foata normal form. 6/5403 useless extension candidates. Maximal degree in co-relation 15019. Up to 4793 conditions per place. [2024-06-28 02:08:51,795 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 66 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-06-28 02:08:51,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 506 flow [2024-06-28 02:08:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:08:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:08:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-28 02:08:51,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-28 02:08:51,800 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 296 flow. Second operand 5 states and 127 transitions. [2024-06-28 02:08:51,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 506 flow [2024-06-28 02:08:51,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 482 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 02:08:51,812 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 307 flow [2024-06-28 02:08:51,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-28 02:08:51,814 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-06-28 02:08:51,814 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 307 flow [2024-06-28 02:08:51,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:51,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:51,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:51,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:08:51,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:51,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:51,815 INFO L85 PathProgramCache]: Analyzing trace with hash -381104672, now seen corresponding path program 1 times [2024-06-28 02:08:51,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:51,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463922861] [2024-06-28 02:08:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:51,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:53,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:53,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463922861] [2024-06-28 02:08:53,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463922861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:53,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:53,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:08:53,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766154697] [2024-06-28 02:08:53,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:53,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:08:53,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:53,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:08:53,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:08:53,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:08:53,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:53,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:53,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:08:53,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:55,125 INFO L124 PetriNetUnfolderBase]: 4066/6255 cut-off events. [2024-06-28 02:08:55,125 INFO L125 PetriNetUnfolderBase]: For 9184/9184 co-relation queries the response was YES. [2024-06-28 02:08:55,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17885 conditions, 6255 events. 4066/6255 cut-off events. For 9184/9184 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36367 event pairs, 1467 based on Foata normal form. 2/6251 useless extension candidates. Maximal degree in co-relation 17862. Up to 5637 conditions per place. [2024-06-28 02:08:55,183 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 81 selfloop transitions, 24 changer transitions 0/112 dead transitions. [2024-06-28 02:08:55,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 685 flow [2024-06-28 02:08:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:08:55,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:08:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:08:55,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-06-28 02:08:55,185 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 307 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:08:55,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 685 flow [2024-06-28 02:08:55,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 666 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 02:08:55,191 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 423 flow [2024-06-28 02:08:55,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-28 02:08:55,192 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2024-06-28 02:08:55,192 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 423 flow [2024-06-28 02:08:55,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:55,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:55,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:55,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:08:55,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:55,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:55,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2076485964, now seen corresponding path program 2 times [2024-06-28 02:08:55,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:55,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577471130] [2024-06-28 02:08:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:55,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:56,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:56,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577471130] [2024-06-28 02:08:56,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577471130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:56,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:56,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:08:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142055194] [2024-06-28 02:08:56,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:08:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:08:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:08:56,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:08:56,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 423 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:56,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:56,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:08:56,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:08:58,343 INFO L124 PetriNetUnfolderBase]: 4061/6237 cut-off events. [2024-06-28 02:08:58,343 INFO L125 PetriNetUnfolderBase]: For 13600/13600 co-relation queries the response was YES. [2024-06-28 02:08:58,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19477 conditions, 6237 events. 4061/6237 cut-off events. For 13600/13600 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 36202 event pairs, 1483 based on Foata normal form. 2/6229 useless extension candidates. Maximal degree in co-relation 19451. Up to 5634 conditions per place. [2024-06-28 02:08:58,372 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 75 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-28 02:08:58,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 768 flow [2024-06-28 02:08:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:08:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:08:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-28 02:08:58,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243055555555556 [2024-06-28 02:08:58,375 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 423 flow. Second operand 6 states and 151 transitions. [2024-06-28 02:08:58,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 768 flow [2024-06-28 02:08:58,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 723 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-28 02:08:58,386 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 484 flow [2024-06-28 02:08:58,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-28 02:08:58,387 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-28 02:08:58,387 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 484 flow [2024-06-28 02:08:58,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:58,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:08:58,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:08:58,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:08:58,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:08:58,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:08:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash -779660986, now seen corresponding path program 1 times [2024-06-28 02:08:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:08:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468367971] [2024-06-28 02:08:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:08:58,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:08:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:08:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:08:59,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:08:59,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468367971] [2024-06-28 02:08:59,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468367971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:08:59,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:08:59,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:08:59,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228875320] [2024-06-28 02:08:59,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:08:59,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:08:59,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:08:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:08:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:08:59,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:08:59,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:08:59,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:08:59,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:08:59,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:01,301 INFO L124 PetriNetUnfolderBase]: 4239/6500 cut-off events. [2024-06-28 02:09:01,301 INFO L125 PetriNetUnfolderBase]: For 16285/16287 co-relation queries the response was YES. [2024-06-28 02:09:01,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21060 conditions, 6500 events. 4239/6500 cut-off events. For 16285/16287 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37589 event pairs, 1468 based on Foata normal form. 6/6500 useless extension candidates. Maximal degree in co-relation 21032. Up to 5772 conditions per place. [2024-06-28 02:09:01,352 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 95 selfloop transitions, 47 changer transitions 0/149 dead transitions. [2024-06-28 02:09:01,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 149 transitions, 1131 flow [2024-06-28 02:09:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-28 02:09:01,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-28 02:09:01,355 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 484 flow. Second operand 7 states and 188 transitions. [2024-06-28 02:09:01,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 149 transitions, 1131 flow [2024-06-28 02:09:01,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 149 transitions, 1040 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 02:09:01,370 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 741 flow [2024-06-28 02:09:01,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=741, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2024-06-28 02:09:01,372 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 29 predicate places. [2024-06-28 02:09:01,372 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 741 flow [2024-06-28 02:09:01,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:01,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:01,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:01,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:09:01,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:01,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1544337840, now seen corresponding path program 2 times [2024-06-28 02:09:01,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:01,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226694185] [2024-06-28 02:09:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:01,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:03,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:03,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226694185] [2024-06-28 02:09:03,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226694185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:03,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:03,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:09:03,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603780822] [2024-06-28 02:09:03,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:03,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:09:03,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:03,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:09:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:09:03,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:03,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 741 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:03,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:03,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:03,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:04,549 INFO L124 PetriNetUnfolderBase]: 4335/6654 cut-off events. [2024-06-28 02:09:04,550 INFO L125 PetriNetUnfolderBase]: For 19793/19797 co-relation queries the response was YES. [2024-06-28 02:09:04,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22468 conditions, 6654 events. 4335/6654 cut-off events. For 19793/19797 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38443 event pairs, 1483 based on Foata normal form. 10/6658 useless extension candidates. Maximal degree in co-relation 22436. Up to 5854 conditions per place. [2024-06-28 02:09:04,588 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 86 selfloop transitions, 54 changer transitions 0/147 dead transitions. [2024-06-28 02:09:04,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 147 transitions, 1267 flow [2024-06-28 02:09:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:09:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:09:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-28 02:09:04,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2024-06-28 02:09:04,590 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 741 flow. Second operand 6 states and 158 transitions. [2024-06-28 02:09:04,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 147 transitions, 1267 flow [2024-06-28 02:09:04,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 147 transitions, 1194 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 02:09:04,608 INFO L231 Difference]: Finished difference. Result has 84 places, 106 transitions, 896 flow [2024-06-28 02:09:04,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=84, PETRI_TRANSITIONS=106} [2024-06-28 02:09:04,609 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-06-28 02:09:04,609 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 106 transitions, 896 flow [2024-06-28 02:09:04,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:04,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:04,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:04,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:09:04,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:04,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1849307146, now seen corresponding path program 3 times [2024-06-28 02:09:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:04,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668775955] [2024-06-28 02:09:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:06,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:06,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668775955] [2024-06-28 02:09:06,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668775955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:06,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:06,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:09:06,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216092464] [2024-06-28 02:09:06,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:06,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:09:06,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:09:06,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:09:06,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:06,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 106 transitions, 896 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:06,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:06,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:06,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:07,731 INFO L124 PetriNetUnfolderBase]: 4319/6620 cut-off events. [2024-06-28 02:09:07,732 INFO L125 PetriNetUnfolderBase]: For 22472/22490 co-relation queries the response was YES. [2024-06-28 02:09:07,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22629 conditions, 6620 events. 4319/6620 cut-off events. For 22472/22490 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 38208 event pairs, 1489 based on Foata normal form. 18/6624 useless extension candidates. Maximal degree in co-relation 22596. Up to 5841 conditions per place. [2024-06-28 02:09:07,765 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 82 selfloop transitions, 53 changer transitions 0/142 dead transitions. [2024-06-28 02:09:07,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 142 transitions, 1274 flow [2024-06-28 02:09:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:09:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:09:07,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 02:09:07,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-28 02:09:07,768 INFO L175 Difference]: Start difference. First operand has 84 places, 106 transitions, 896 flow. Second operand 6 states and 150 transitions. [2024-06-28 02:09:07,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 142 transitions, 1274 flow [2024-06-28 02:09:07,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 142 transitions, 1161 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 02:09:07,786 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 902 flow [2024-06-28 02:09:07,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=902, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-28 02:09:07,787 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-06-28 02:09:07,787 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 902 flow [2024-06-28 02:09:07,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:07,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:07,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:09:07,788 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:07,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:07,788 INFO L85 PathProgramCache]: Analyzing trace with hash -53165716, now seen corresponding path program 1 times [2024-06-28 02:09:07,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:07,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415282612] [2024-06-28 02:09:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:07,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:10,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415282612] [2024-06-28 02:09:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415282612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:10,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:10,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262469882] [2024-06-28 02:09:10,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:10,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:10,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:09:10,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 902 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:10,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:10,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:09:10,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:11,876 INFO L124 PetriNetUnfolderBase]: 3630/5807 cut-off events. [2024-06-28 02:09:11,876 INFO L125 PetriNetUnfolderBase]: For 19712/19715 co-relation queries the response was YES. [2024-06-28 02:09:11,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19703 conditions, 5807 events. 3630/5807 cut-off events. For 19712/19715 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 34627 event pairs, 1203 based on Foata normal form. 6/5809 useless extension candidates. Maximal degree in co-relation 19670. Up to 5128 conditions per place. [2024-06-28 02:09:11,903 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 118 selfloop transitions, 16 changer transitions 0/142 dead transitions. [2024-06-28 02:09:11,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 142 transitions, 1288 flow [2024-06-28 02:09:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:09:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:09:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:09:11,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 02:09:11,905 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 902 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:09:11,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 142 transitions, 1288 flow [2024-06-28 02:09:11,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 142 transitions, 1061 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 02:09:11,919 INFO L231 Difference]: Finished difference. Result has 84 places, 109 transitions, 751 flow [2024-06-28 02:09:11,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=84, PETRI_TRANSITIONS=109} [2024-06-28 02:09:11,920 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-06-28 02:09:11,920 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 109 transitions, 751 flow [2024-06-28 02:09:11,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:11,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:11,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:11,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:09:11,921 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:11,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash -165864257, now seen corresponding path program 1 times [2024-06-28 02:09:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:11,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331080736] [2024-06-28 02:09:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:11,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:14,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:14,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331080736] [2024-06-28 02:09:14,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331080736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:14,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:14,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416947359] [2024-06-28 02:09:14,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:14,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:14,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:14,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:14,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 109 transitions, 751 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:14,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:14,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:14,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:16,086 INFO L124 PetriNetUnfolderBase]: 4399/6759 cut-off events. [2024-06-28 02:09:16,087 INFO L125 PetriNetUnfolderBase]: For 23247/23247 co-relation queries the response was YES. [2024-06-28 02:09:16,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23323 conditions, 6759 events. 4399/6759 cut-off events. For 23247/23247 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 39089 event pairs, 1470 based on Foata normal form. 2/6758 useless extension candidates. Maximal degree in co-relation 23291. Up to 6156 conditions per place. [2024-06-28 02:09:16,124 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 146 selfloop transitions, 25 changer transitions 0/178 dead transitions. [2024-06-28 02:09:16,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 178 transitions, 1381 flow [2024-06-28 02:09:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:09:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:09:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:09:16,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-28 02:09:16,126 INFO L175 Difference]: Start difference. First operand has 84 places, 109 transitions, 751 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:09:16,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 178 transitions, 1381 flow [2024-06-28 02:09:16,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 178 transitions, 1329 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 02:09:16,145 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 851 flow [2024-06-28 02:09:16,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=851, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-28 02:09:16,146 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-06-28 02:09:16,146 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 851 flow [2024-06-28 02:09:16,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:16,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:16,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:16,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:09:16,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:16,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash 625186251, now seen corresponding path program 2 times [2024-06-28 02:09:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:16,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935616714] [2024-06-28 02:09:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:16,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:18,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:18,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935616714] [2024-06-28 02:09:18,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935616714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:18,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:18,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:18,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654553228] [2024-06-28 02:09:18,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:18,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:18,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 851 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:18,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:18,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:18,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:20,356 INFO L124 PetriNetUnfolderBase]: 4425/6807 cut-off events. [2024-06-28 02:09:20,357 INFO L125 PetriNetUnfolderBase]: For 29778/29778 co-relation queries the response was YES. [2024-06-28 02:09:20,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24994 conditions, 6807 events. 4425/6807 cut-off events. For 29778/29778 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39501 event pairs, 1337 based on Foata normal form. 2/6803 useless extension candidates. Maximal degree in co-relation 24960. Up to 5679 conditions per place. [2024-06-28 02:09:20,396 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 105 selfloop transitions, 64 changer transitions 0/176 dead transitions. [2024-06-28 02:09:20,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 176 transitions, 1477 flow [2024-06-28 02:09:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-28 02:09:20,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-28 02:09:20,400 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 851 flow. Second operand 7 states and 183 transitions. [2024-06-28 02:09:20,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 176 transitions, 1477 flow [2024-06-28 02:09:20,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 176 transitions, 1394 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 02:09:20,426 INFO L231 Difference]: Finished difference. Result has 91 places, 125 transitions, 1053 flow [2024-06-28 02:09:20,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=91, PETRI_TRANSITIONS=125} [2024-06-28 02:09:20,427 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-06-28 02:09:20,428 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 125 transitions, 1053 flow [2024-06-28 02:09:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:20,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:20,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:09:20,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:20,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1493711135, now seen corresponding path program 3 times [2024-06-28 02:09:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:20,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666894705] [2024-06-28 02:09:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:20,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:22,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:22,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666894705] [2024-06-28 02:09:22,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666894705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:22,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:22,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439853722] [2024-06-28 02:09:22,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:22,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:22,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:22,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:22,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 125 transitions, 1053 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:22,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:22,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:22,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:24,562 INFO L124 PetriNetUnfolderBase]: 4420/6764 cut-off events. [2024-06-28 02:09:24,563 INFO L125 PetriNetUnfolderBase]: For 37362/37362 co-relation queries the response was YES. [2024-06-28 02:09:24,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26907 conditions, 6764 events. 4420/6764 cut-off events. For 37362/37362 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39066 event pairs, 1433 based on Foata normal form. 2/6740 useless extension candidates. Maximal degree in co-relation 26872. Up to 5676 conditions per place. [2024-06-28 02:09:24,600 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 98 selfloop transitions, 70 changer transitions 0/175 dead transitions. [2024-06-28 02:09:24,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 175 transitions, 1630 flow [2024-06-28 02:09:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:09:24,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-28 02:09:24,603 INFO L175 Difference]: Start difference. First operand has 91 places, 125 transitions, 1053 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:09:24,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 175 transitions, 1630 flow [2024-06-28 02:09:24,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 175 transitions, 1543 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-28 02:09:24,634 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1177 flow [2024-06-28 02:09:24,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=970, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-28 02:09:24,635 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2024-06-28 02:09:24,635 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1177 flow [2024-06-28 02:09:24,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:24,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:24,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:24,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:09:24,636 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:24,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1615574341, now seen corresponding path program 1 times [2024-06-28 02:09:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:24,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895198308] [2024-06-28 02:09:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:24,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:26,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:26,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895198308] [2024-06-28 02:09:26,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895198308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:26,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:26,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:09:26,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835511335] [2024-06-28 02:09:26,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:26,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:09:26,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:26,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:09:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:09:26,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:09:26,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1177 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:26,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:26,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:09:26,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:27,612 INFO L124 PetriNetUnfolderBase]: 3733/5968 cut-off events. [2024-06-28 02:09:27,612 INFO L125 PetriNetUnfolderBase]: For 31088/31088 co-relation queries the response was YES. [2024-06-28 02:09:27,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23337 conditions, 5968 events. 3733/5968 cut-off events. For 31088/31088 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 35529 event pairs, 1204 based on Foata normal form. 2/5967 useless extension candidates. Maximal degree in co-relation 23300. Up to 5334 conditions per place. [2024-06-28 02:09:27,644 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 138 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2024-06-28 02:09:27,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 157 transitions, 1595 flow [2024-06-28 02:09:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:09:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:09:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-28 02:09:27,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-28 02:09:27,645 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1177 flow. Second operand 5 states and 123 transitions. [2024-06-28 02:09:27,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 157 transitions, 1595 flow [2024-06-28 02:09:27,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 157 transitions, 1470 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 02:09:27,676 INFO L231 Difference]: Finished difference. Result has 97 places, 135 transitions, 1146 flow [2024-06-28 02:09:27,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1146, PETRI_PLACES=97, PETRI_TRANSITIONS=135} [2024-06-28 02:09:27,677 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 45 predicate places. [2024-06-28 02:09:27,677 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 135 transitions, 1146 flow [2024-06-28 02:09:27,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:27,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:27,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:27,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:09:27,677 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:27,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:27,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1955676689, now seen corresponding path program 1 times [2024-06-28 02:09:27,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:27,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810232105] [2024-06-28 02:09:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:27,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:30,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:30,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810232105] [2024-06-28 02:09:30,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810232105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:30,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030088999] [2024-06-28 02:09:30,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:30,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:30,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:30,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:30,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:30,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 135 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:30,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:30,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:30,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:31,755 INFO L124 PetriNetUnfolderBase]: 4401/6762 cut-off events. [2024-06-28 02:09:31,756 INFO L125 PetriNetUnfolderBase]: For 40391/40391 co-relation queries the response was YES. [2024-06-28 02:09:31,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27090 conditions, 6762 events. 4401/6762 cut-off events. For 40391/40391 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39232 event pairs, 1467 based on Foata normal form. 4/6763 useless extension candidates. Maximal degree in co-relation 27050. Up to 6165 conditions per place. [2024-06-28 02:09:31,797 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 162 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2024-06-28 02:09:31,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 194 transitions, 1686 flow [2024-06-28 02:09:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:09:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:09:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:09:31,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-28 02:09:31,801 INFO L175 Difference]: Start difference. First operand has 97 places, 135 transitions, 1146 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:09:31,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 194 transitions, 1686 flow [2024-06-28 02:09:31,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 194 transitions, 1654 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-28 02:09:31,843 INFO L231 Difference]: Finished difference. Result has 104 places, 135 transitions, 1173 flow [2024-06-28 02:09:31,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=104, PETRI_TRANSITIONS=135} [2024-06-28 02:09:31,844 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 52 predicate places. [2024-06-28 02:09:31,844 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 135 transitions, 1173 flow [2024-06-28 02:09:31,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:31,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:31,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:09:31,844 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:31,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1888938597, now seen corresponding path program 2 times [2024-06-28 02:09:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229870272] [2024-06-28 02:09:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229870272] [2024-06-28 02:09:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229870272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:35,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:35,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:35,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225640585] [2024-06-28 02:09:35,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:35,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:35,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:35,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:35,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 135 transitions, 1173 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:35,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:35,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:35,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:37,175 INFO L124 PetriNetUnfolderBase]: 4453/6846 cut-off events. [2024-06-28 02:09:37,175 INFO L125 PetriNetUnfolderBase]: For 43820/43820 co-relation queries the response was YES. [2024-06-28 02:09:37,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27817 conditions, 6846 events. 4453/6846 cut-off events. For 43820/43820 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39551 event pairs, 1339 based on Foata normal form. 4/6844 useless extension candidates. Maximal degree in co-relation 27774. Up to 5700 conditions per place. [2024-06-28 02:09:37,224 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 121 selfloop transitions, 71 changer transitions 0/199 dead transitions. [2024-06-28 02:09:37,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 199 transitions, 1837 flow [2024-06-28 02:09:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:09:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:09:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-28 02:09:37,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:09:37,227 INFO L175 Difference]: Start difference. First operand has 104 places, 135 transitions, 1173 flow. Second operand 8 states and 208 transitions. [2024-06-28 02:09:37,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 199 transitions, 1837 flow [2024-06-28 02:09:37,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 199 transitions, 1787 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:09:37,351 INFO L231 Difference]: Finished difference. Result has 105 places, 139 transitions, 1330 flow [2024-06-28 02:09:37,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1330, PETRI_PLACES=105, PETRI_TRANSITIONS=139} [2024-06-28 02:09:37,351 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 53 predicate places. [2024-06-28 02:09:37,351 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 139 transitions, 1330 flow [2024-06-28 02:09:37,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:37,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:37,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:37,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:09:37,352 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:37,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:37,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1949962769, now seen corresponding path program 3 times [2024-06-28 02:09:37,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:37,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814423275] [2024-06-28 02:09:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:37,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:39,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:39,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814423275] [2024-06-28 02:09:39,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814423275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:39,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:39,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:39,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902641368] [2024-06-28 02:09:39,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:39,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:39,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:39,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:39,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:39,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 139 transitions, 1330 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:39,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:39,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:39,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:41,570 INFO L124 PetriNetUnfolderBase]: 4567/7035 cut-off events. [2024-06-28 02:09:41,570 INFO L125 PetriNetUnfolderBase]: For 50178/50182 co-relation queries the response was YES. [2024-06-28 02:09:41,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29415 conditions, 7035 events. 4567/7035 cut-off events. For 50178/50182 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 41010 event pairs, 1324 based on Foata normal form. 8/7037 useless extension candidates. Maximal degree in co-relation 29371. Up to 5796 conditions per place. [2024-06-28 02:09:41,607 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 113 selfloop transitions, 81 changer transitions 0/201 dead transitions. [2024-06-28 02:09:41,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 201 transitions, 2118 flow [2024-06-28 02:09:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-28 02:09:41,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-28 02:09:41,610 INFO L175 Difference]: Start difference. First operand has 105 places, 139 transitions, 1330 flow. Second operand 7 states and 187 transitions. [2024-06-28 02:09:41,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 201 transitions, 2118 flow [2024-06-28 02:09:41,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 201 transitions, 1928 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 02:09:41,659 INFO L231 Difference]: Finished difference. Result has 106 places, 147 transitions, 1441 flow [2024-06-28 02:09:41,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=106, PETRI_TRANSITIONS=147} [2024-06-28 02:09:41,660 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 54 predicate places. [2024-06-28 02:09:41,660 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 147 transitions, 1441 flow [2024-06-28 02:09:41,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:41,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:41,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:41,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:09:41,661 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:41,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1949954833, now seen corresponding path program 1 times [2024-06-28 02:09:41,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:41,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624351059] [2024-06-28 02:09:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:41,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:44,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:44,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624351059] [2024-06-28 02:09:44,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624351059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:44,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:44,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:44,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353981949] [2024-06-28 02:09:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:44,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:44,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:44,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:44,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 147 transitions, 1441 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:44,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:44,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:44,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:46,079 INFO L124 PetriNetUnfolderBase]: 4609/7097 cut-off events. [2024-06-28 02:09:46,080 INFO L125 PetriNetUnfolderBase]: For 53204/53208 co-relation queries the response was YES. [2024-06-28 02:09:46,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29795 conditions, 7097 events. 4609/7097 cut-off events. For 53204/53208 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 41380 event pairs, 1358 based on Foata normal form. 8/7099 useless extension candidates. Maximal degree in co-relation 29750. Up to 6190 conditions per place. [2024-06-28 02:09:46,119 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 135 selfloop transitions, 57 changer transitions 0/199 dead transitions. [2024-06-28 02:09:46,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 199 transitions, 1999 flow [2024-06-28 02:09:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:09:46,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-28 02:09:46,121 INFO L175 Difference]: Start difference. First operand has 106 places, 147 transitions, 1441 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:09:46,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 199 transitions, 1999 flow [2024-06-28 02:09:46,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 199 transitions, 1885 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-28 02:09:46,167 INFO L231 Difference]: Finished difference. Result has 110 places, 150 transitions, 1495 flow [2024-06-28 02:09:46,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=110, PETRI_TRANSITIONS=150} [2024-06-28 02:09:46,167 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-06-28 02:09:46,168 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 150 transitions, 1495 flow [2024-06-28 02:09:46,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:46,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:46,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:46,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:09:46,169 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:46,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:46,170 INFO L85 PathProgramCache]: Analyzing trace with hash 181170863, now seen corresponding path program 4 times [2024-06-28 02:09:46,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:46,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112945282] [2024-06-28 02:09:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:46,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:48,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:48,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112945282] [2024-06-28 02:09:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112945282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434866012] [2024-06-28 02:09:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:48,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:48,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:48,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:48,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 150 transitions, 1495 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:48,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:48,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:48,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:50,776 INFO L124 PetriNetUnfolderBase]: 4599/7013 cut-off events. [2024-06-28 02:09:50,777 INFO L125 PetriNetUnfolderBase]: For 59954/59954 co-relation queries the response was YES. [2024-06-28 02:09:50,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30239 conditions, 7013 events. 4599/7013 cut-off events. For 59954/59954 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 40282 event pairs, 1469 based on Foata normal form. 4/6989 useless extension candidates. Maximal degree in co-relation 30193. Up to 5850 conditions per place. [2024-06-28 02:09:50,826 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 117 selfloop transitions, 82 changer transitions 0/206 dead transitions. [2024-06-28 02:09:50,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 206 transitions, 2123 flow [2024-06-28 02:09:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:09:50,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:09:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:09:50,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-28 02:09:50,829 INFO L175 Difference]: Start difference. First operand has 110 places, 150 transitions, 1495 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:09:50,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 206 transitions, 2123 flow [2024-06-28 02:09:50,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 206 transitions, 1965 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 02:09:50,897 INFO L231 Difference]: Finished difference. Result has 113 places, 150 transitions, 1510 flow [2024-06-28 02:09:50,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1510, PETRI_PLACES=113, PETRI_TRANSITIONS=150} [2024-06-28 02:09:50,898 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 61 predicate places. [2024-06-28 02:09:50,898 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 150 transitions, 1510 flow [2024-06-28 02:09:50,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:50,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:50,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:50,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:09:50,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:50,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:50,900 INFO L85 PathProgramCache]: Analyzing trace with hash 129548957, now seen corresponding path program 5 times [2024-06-28 02:09:50,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:50,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455041653] [2024-06-28 02:09:50,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:50,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:53,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:53,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455041653] [2024-06-28 02:09:53,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455041653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:53,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:53,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:09:53,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890413412] [2024-06-28 02:09:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:53,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:09:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:09:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:09:53,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:53,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 150 transitions, 1510 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:53,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:53,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:53,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:54,923 INFO L124 PetriNetUnfolderBase]: 4589/7035 cut-off events. [2024-06-28 02:09:54,924 INFO L125 PetriNetUnfolderBase]: For 62409/62421 co-relation queries the response was YES. [2024-06-28 02:09:54,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30347 conditions, 7035 events. 4589/7035 cut-off events. For 62409/62421 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 40888 event pairs, 1372 based on Foata normal form. 12/7027 useless extension candidates. Maximal degree in co-relation 30300. Up to 5842 conditions per place. [2024-06-28 02:09:54,969 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 110 selfloop transitions, 79 changer transitions 0/196 dead transitions. [2024-06-28 02:09:54,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 196 transitions, 2022 flow [2024-06-28 02:09:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:09:54,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-28 02:09:54,971 INFO L175 Difference]: Start difference. First operand has 113 places, 150 transitions, 1510 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:09:54,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 196 transitions, 2022 flow [2024-06-28 02:09:55,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 196 transitions, 1796 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 02:09:55,050 INFO L231 Difference]: Finished difference. Result has 112 places, 150 transitions, 1452 flow [2024-06-28 02:09:55,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1452, PETRI_PLACES=112, PETRI_TRANSITIONS=150} [2024-06-28 02:09:55,051 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-28 02:09:55,051 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 150 transitions, 1452 flow [2024-06-28 02:09:55,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:55,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:55,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:55,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:09:55,052 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:55,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 438146169, now seen corresponding path program 2 times [2024-06-28 02:09:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:55,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931686735] [2024-06-28 02:09:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:09:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:09:57,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:09:57,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931686735] [2024-06-28 02:09:57,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931686735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:09:57,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:09:57,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:09:57,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783555868] [2024-06-28 02:09:57,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:09:57,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:09:57,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:09:57,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:09:57,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:09:57,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:09:57,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 150 transitions, 1452 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:57,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:09:57,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:09:57,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:09:59,664 INFO L124 PetriNetUnfolderBase]: 4631/7129 cut-off events. [2024-06-28 02:09:59,664 INFO L125 PetriNetUnfolderBase]: For 64545/64557 co-relation queries the response was YES. [2024-06-28 02:09:59,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30660 conditions, 7129 events. 4631/7129 cut-off events. For 64545/64557 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 41533 event pairs, 1379 based on Foata normal form. 12/7127 useless extension candidates. Maximal degree in co-relation 30613. Up to 6234 conditions per place. [2024-06-28 02:09:59,715 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 136 selfloop transitions, 56 changer transitions 0/199 dead transitions. [2024-06-28 02:09:59,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 199 transitions, 2014 flow [2024-06-28 02:09:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:09:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:09:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:09:59,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 02:09:59,718 INFO L175 Difference]: Start difference. First operand has 112 places, 150 transitions, 1452 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:09:59,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 199 transitions, 2014 flow [2024-06-28 02:09:59,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1636 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-28 02:09:59,791 INFO L231 Difference]: Finished difference. Result has 109 places, 153 transitions, 1245 flow [2024-06-28 02:09:59,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=109, PETRI_TRANSITIONS=153} [2024-06-28 02:09:59,792 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-28 02:09:59,792 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 153 transitions, 1245 flow [2024-06-28 02:09:59,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:09:59,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:09:59,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:09:59,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:09:59,793 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:09:59,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:09:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash -931959125, now seen corresponding path program 3 times [2024-06-28 02:09:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:09:59,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693913140] [2024-06-28 02:09:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:09:59,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:09:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:02,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:02,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693913140] [2024-06-28 02:10:02,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693913140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:02,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:02,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:02,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798947736] [2024-06-28 02:10:02,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:02,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:02,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:02,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:02,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 153 transitions, 1245 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:02,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:02,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:02,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:04,032 INFO L124 PetriNetUnfolderBase]: 4623/6997 cut-off events. [2024-06-28 02:10:04,032 INFO L125 PetriNetUnfolderBase]: For 66704/66716 co-relation queries the response was YES. [2024-06-28 02:10:04,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30392 conditions, 6997 events. 4623/6997 cut-off events. For 66704/66716 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 40337 event pairs, 1291 based on Foata normal form. 12/6995 useless extension candidates. Maximal degree in co-relation 30347. Up to 6080 conditions per place. [2024-06-28 02:10:04,072 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 130 selfloop transitions, 64 changer transitions 0/201 dead transitions. [2024-06-28 02:10:04,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 201 transitions, 1809 flow [2024-06-28 02:10:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:10:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:10:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-28 02:10:04,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-28 02:10:04,074 INFO L175 Difference]: Start difference. First operand has 109 places, 153 transitions, 1245 flow. Second operand 7 states and 174 transitions. [2024-06-28 02:10:04,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 201 transitions, 1809 flow [2024-06-28 02:10:04,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 201 transitions, 1664 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 02:10:04,125 INFO L231 Difference]: Finished difference. Result has 111 places, 156 transitions, 1292 flow [2024-06-28 02:10:04,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=111, PETRI_TRANSITIONS=156} [2024-06-28 02:10:04,126 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-28 02:10:04,126 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 156 transitions, 1292 flow [2024-06-28 02:10:04,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:04,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:04,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:04,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:10:04,127 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:04,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash 949115576, now seen corresponding path program 1 times [2024-06-28 02:10:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:04,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487712377] [2024-06-28 02:10:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:04,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:07,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487712377] [2024-06-28 02:10:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487712377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:07,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:07,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089140636] [2024-06-28 02:10:07,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:07,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:07,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:07,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:07,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 156 transitions, 1292 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:07,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:07,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:07,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:09,075 INFO L124 PetriNetUnfolderBase]: 4941/7608 cut-off events. [2024-06-28 02:10:09,075 INFO L125 PetriNetUnfolderBase]: For 87610/87610 co-relation queries the response was YES. [2024-06-28 02:10:09,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34341 conditions, 7608 events. 4941/7608 cut-off events. For 87610/87610 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 44861 event pairs, 1089 based on Foata normal form. 4/7609 useless extension candidates. Maximal degree in co-relation 34295. Up to 6475 conditions per place. [2024-06-28 02:10:09,122 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 199 selfloop transitions, 32 changer transitions 0/238 dead transitions. [2024-06-28 02:10:09,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 238 transitions, 2174 flow [2024-06-28 02:10:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:10:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:10:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-28 02:10:09,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:10:09,144 INFO L175 Difference]: Start difference. First operand has 111 places, 156 transitions, 1292 flow. Second operand 9 states and 234 transitions. [2024-06-28 02:10:09,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 238 transitions, 2174 flow [2024-06-28 02:10:09,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 238 transitions, 2006 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 02:10:09,217 INFO L231 Difference]: Finished difference. Result has 115 places, 161 transitions, 1308 flow [2024-06-28 02:10:09,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1308, PETRI_PLACES=115, PETRI_TRANSITIONS=161} [2024-06-28 02:10:09,218 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 63 predicate places. [2024-06-28 02:10:09,218 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 161 transitions, 1308 flow [2024-06-28 02:10:09,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:09,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:09,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:09,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:10:09,219 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:09,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1288715904, now seen corresponding path program 2 times [2024-06-28 02:10:09,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:09,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988050005] [2024-06-28 02:10:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:09,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:12,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:12,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988050005] [2024-06-28 02:10:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988050005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:12,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:12,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:12,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690063717] [2024-06-28 02:10:12,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:12,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:12,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:12,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 161 transitions, 1308 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:12,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:12,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:12,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:13,946 INFO L124 PetriNetUnfolderBase]: 4933/7596 cut-off events. [2024-06-28 02:10:13,946 INFO L125 PetriNetUnfolderBase]: For 93427/93427 co-relation queries the response was YES. [2024-06-28 02:10:13,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34625 conditions, 7596 events. 4933/7596 cut-off events. For 93427/93427 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 44844 event pairs, 1429 based on Foata normal form. 4/7597 useless extension candidates. Maximal degree in co-relation 34578. Up to 6911 conditions per place. [2024-06-28 02:10:13,998 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 198 selfloop transitions, 28 changer transitions 0/233 dead transitions. [2024-06-28 02:10:13,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 233 transitions, 2018 flow [2024-06-28 02:10:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:10:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:10:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-28 02:10:14,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-06-28 02:10:14,001 INFO L175 Difference]: Start difference. First operand has 115 places, 161 transitions, 1308 flow. Second operand 9 states and 226 transitions. [2024-06-28 02:10:14,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 233 transitions, 2018 flow [2024-06-28 02:10:14,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 233 transitions, 1915 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 02:10:14,106 INFO L231 Difference]: Finished difference. Result has 119 places, 164 transitions, 1341 flow [2024-06-28 02:10:14,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1341, PETRI_PLACES=119, PETRI_TRANSITIONS=164} [2024-06-28 02:10:14,107 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 67 predicate places. [2024-06-28 02:10:14,107 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 164 transitions, 1341 flow [2024-06-28 02:10:14,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:14,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:14,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:14,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:10:14,108 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:14,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1429087114, now seen corresponding path program 3 times [2024-06-28 02:10:14,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:14,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666432940] [2024-06-28 02:10:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:16,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:16,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666432940] [2024-06-28 02:10:16,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666432940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:16,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:16,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:16,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659280402] [2024-06-28 02:10:16,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:16,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:16,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:16,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 164 transitions, 1341 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:16,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:16,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:16,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:18,676 INFO L124 PetriNetUnfolderBase]: 4975/7660 cut-off events. [2024-06-28 02:10:18,676 INFO L125 PetriNetUnfolderBase]: For 98878/98878 co-relation queries the response was YES. [2024-06-28 02:10:18,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35286 conditions, 7660 events. 4975/7660 cut-off events. For 98878/98878 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 45121 event pairs, 1253 based on Foata normal form. 4/7658 useless extension candidates. Maximal degree in co-relation 35237. Up to 6386 conditions per place. [2024-06-28 02:10:18,723 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 136 selfloop transitions, 82 changer transitions 0/225 dead transitions. [2024-06-28 02:10:18,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 225 transitions, 2007 flow [2024-06-28 02:10:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:10:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:10:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 02:10:18,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-28 02:10:18,736 INFO L175 Difference]: Start difference. First operand has 119 places, 164 transitions, 1341 flow. Second operand 8 states and 205 transitions. [2024-06-28 02:10:18,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 225 transitions, 2007 flow [2024-06-28 02:10:18,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 225 transitions, 1909 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 02:10:18,836 INFO L231 Difference]: Finished difference. Result has 120 places, 167 transitions, 1489 flow [2024-06-28 02:10:18,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1489, PETRI_PLACES=120, PETRI_TRANSITIONS=167} [2024-06-28 02:10:18,837 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 68 predicate places. [2024-06-28 02:10:18,837 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 167 transitions, 1489 flow [2024-06-28 02:10:18,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:18,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:18,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:18,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:10:18,838 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:18,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:18,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1437929822, now seen corresponding path program 1 times [2024-06-28 02:10:18,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:18,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756791167] [2024-06-28 02:10:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:18,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:20,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:20,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756791167] [2024-06-28 02:10:20,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756791167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:20,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:20,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:10:20,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986097947] [2024-06-28 02:10:20,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:10:20,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:10:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:10:20,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:20,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 167 transitions, 1489 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:20,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:20,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:20,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:22,644 INFO L124 PetriNetUnfolderBase]: 5021/7708 cut-off events. [2024-06-28 02:10:22,645 INFO L125 PetriNetUnfolderBase]: For 108311/108311 co-relation queries the response was YES. [2024-06-28 02:10:22,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36510 conditions, 7708 events. 5021/7708 cut-off events. For 108311/108311 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 45321 event pairs, 1367 based on Foata normal form. 2/7707 useless extension candidates. Maximal degree in co-relation 36460. Up to 7027 conditions per place. [2024-06-28 02:10:22,705 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 190 selfloop transitions, 22 changer transitions 0/219 dead transitions. [2024-06-28 02:10:22,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 219 transitions, 2253 flow [2024-06-28 02:10:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:10:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:10:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:10:22,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-28 02:10:22,707 INFO L175 Difference]: Start difference. First operand has 120 places, 167 transitions, 1489 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:10:22,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 219 transitions, 2253 flow [2024-06-28 02:10:22,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 219 transitions, 2031 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 02:10:22,864 INFO L231 Difference]: Finished difference. Result has 122 places, 177 transitions, 1441 flow [2024-06-28 02:10:22,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1441, PETRI_PLACES=122, PETRI_TRANSITIONS=177} [2024-06-28 02:10:22,865 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-06-28 02:10:22,865 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 177 transitions, 1441 flow [2024-06-28 02:10:22,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:22,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:22,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:22,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:10:22,866 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:22,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2066675958, now seen corresponding path program 4 times [2024-06-28 02:10:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:22,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903879098] [2024-06-28 02:10:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:22,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:25,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:25,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903879098] [2024-06-28 02:10:25,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903879098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:25,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:25,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:25,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933935055] [2024-06-28 02:10:25,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:25,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:25,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:25,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:25,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:25,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:25,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 177 transitions, 1441 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:25,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:25,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:25,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:27,622 INFO L124 PetriNetUnfolderBase]: 5013/7678 cut-off events. [2024-06-28 02:10:27,622 INFO L125 PetriNetUnfolderBase]: For 113119/113119 co-relation queries the response was YES. [2024-06-28 02:10:27,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36838 conditions, 7678 events. 5013/7678 cut-off events. For 113119/113119 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 44923 event pairs, 1414 based on Foata normal form. 4/7652 useless extension candidates. Maximal degree in co-relation 36785. Up to 6436 conditions per place. [2024-06-28 02:10:27,680 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 142 selfloop transitions, 85 changer transitions 0/234 dead transitions. [2024-06-28 02:10:27,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 234 transitions, 2127 flow [2024-06-28 02:10:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:10:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:10:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-28 02:10:27,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-06-28 02:10:27,683 INFO L175 Difference]: Start difference. First operand has 122 places, 177 transitions, 1441 flow. Second operand 8 states and 199 transitions. [2024-06-28 02:10:27,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 234 transitions, 2127 flow [2024-06-28 02:10:27,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 234 transitions, 2119 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-28 02:10:27,778 INFO L231 Difference]: Finished difference. Result has 129 places, 180 transitions, 1693 flow [2024-06-28 02:10:27,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1693, PETRI_PLACES=129, PETRI_TRANSITIONS=180} [2024-06-28 02:10:27,782 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 77 predicate places. [2024-06-28 02:10:27,782 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 180 transitions, 1693 flow [2024-06-28 02:10:27,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:27,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:27,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:27,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:10:27,783 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:27,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:27,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2083680902, now seen corresponding path program 2 times [2024-06-28 02:10:27,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:27,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541951937] [2024-06-28 02:10:27,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:27,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:29,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:29,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541951937] [2024-06-28 02:10:29,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541951937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:29,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:29,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:10:29,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093818430] [2024-06-28 02:10:29,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:29,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:10:29,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:10:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:10:30,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:30,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 180 transitions, 1693 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:30,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:30,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:30,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:31,869 INFO L124 PetriNetUnfolderBase]: 5007/7597 cut-off events. [2024-06-28 02:10:31,869 INFO L125 PetriNetUnfolderBase]: For 123353/123353 co-relation queries the response was YES. [2024-06-28 02:10:31,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38044 conditions, 7597 events. 5007/7597 cut-off events. For 123353/123353 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 44404 event pairs, 1379 based on Foata normal form. 2/7587 useless extension candidates. Maximal degree in co-relation 37988. Up to 7010 conditions per place. [2024-06-28 02:10:31,923 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 184 selfloop transitions, 24 changer transitions 0/215 dead transitions. [2024-06-28 02:10:31,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 215 transitions, 2293 flow [2024-06-28 02:10:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:10:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:10:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-28 02:10:31,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 02:10:31,925 INFO L175 Difference]: Start difference. First operand has 129 places, 180 transitions, 1693 flow. Second operand 6 states and 144 transitions. [2024-06-28 02:10:31,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 215 transitions, 2293 flow [2024-06-28 02:10:32,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 215 transitions, 2057 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 02:10:32,058 INFO L231 Difference]: Finished difference. Result has 129 places, 182 transitions, 1531 flow [2024-06-28 02:10:32,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=129, PETRI_TRANSITIONS=182} [2024-06-28 02:10:32,061 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 77 predicate places. [2024-06-28 02:10:32,061 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 182 transitions, 1531 flow [2024-06-28 02:10:32,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:32,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:32,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:32,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:10:32,062 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:32,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2089387878, now seen corresponding path program 1 times [2024-06-28 02:10:32,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:32,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309499022] [2024-06-28 02:10:32,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:32,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:33,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:33,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309499022] [2024-06-28 02:10:33,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309499022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:33,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:33,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:10:33,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506657091] [2024-06-28 02:10:33,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:33,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:10:33,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:33,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:10:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:10:33,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:10:33,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 182 transitions, 1531 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:33,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:33,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:10:33,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:35,575 INFO L124 PetriNetUnfolderBase]: 4679/7384 cut-off events. [2024-06-28 02:10:35,575 INFO L125 PetriNetUnfolderBase]: For 111374/111374 co-relation queries the response was YES. [2024-06-28 02:10:35,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35371 conditions, 7384 events. 4679/7384 cut-off events. For 111374/111374 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 45122 event pairs, 1204 based on Foata normal form. 2/7357 useless extension candidates. Maximal degree in co-relation 35314. Up to 6330 conditions per place. [2024-06-28 02:10:35,638 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 195 selfloop transitions, 26 changer transitions 0/232 dead transitions. [2024-06-28 02:10:35,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 232 transitions, 2415 flow [2024-06-28 02:10:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:10:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:10:35,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-28 02:10:35,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451388888888888 [2024-06-28 02:10:35,640 INFO L175 Difference]: Start difference. First operand has 129 places, 182 transitions, 1531 flow. Second operand 6 states and 157 transitions. [2024-06-28 02:10:35,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 232 transitions, 2415 flow [2024-06-28 02:10:35,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 232 transitions, 2389 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 02:10:35,782 INFO L231 Difference]: Finished difference. Result has 135 places, 192 transitions, 1727 flow [2024-06-28 02:10:35,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1727, PETRI_PLACES=135, PETRI_TRANSITIONS=192} [2024-06-28 02:10:35,783 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 83 predicate places. [2024-06-28 02:10:35,783 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 192 transitions, 1727 flow [2024-06-28 02:10:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:35,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:35,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:10:35,784 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:35,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1424994948, now seen corresponding path program 2 times [2024-06-28 02:10:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:35,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725704372] [2024-06-28 02:10:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725704372] [2024-06-28 02:10:37,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725704372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:37,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:37,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:10:37,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793621790] [2024-06-28 02:10:37,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:37,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:10:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:10:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:10:37,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:10:37,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 192 transitions, 1727 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:37,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:37,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:10:37,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:39,394 INFO L124 PetriNetUnfolderBase]: 4704/7437 cut-off events. [2024-06-28 02:10:39,395 INFO L125 PetriNetUnfolderBase]: For 121293/121293 co-relation queries the response was YES. [2024-06-28 02:10:39,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37141 conditions, 7437 events. 4704/7437 cut-off events. For 121293/121293 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 45603 event pairs, 1208 based on Foata normal form. 2/7417 useless extension candidates. Maximal degree in co-relation 37080. Up to 6568 conditions per place. [2024-06-28 02:10:39,458 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 206 selfloop transitions, 21 changer transitions 0/238 dead transitions. [2024-06-28 02:10:39,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 238 transitions, 2488 flow [2024-06-28 02:10:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:10:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:10:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:10:39,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-28 02:10:39,460 INFO L175 Difference]: Start difference. First operand has 135 places, 192 transitions, 1727 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:10:39,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 238 transitions, 2488 flow [2024-06-28 02:10:39,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 238 transitions, 2420 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-28 02:10:39,618 INFO L231 Difference]: Finished difference. Result has 142 places, 200 transitions, 1861 flow [2024-06-28 02:10:39,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1861, PETRI_PLACES=142, PETRI_TRANSITIONS=200} [2024-06-28 02:10:39,621 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 90 predicate places. [2024-06-28 02:10:39,621 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 200 transitions, 1861 flow [2024-06-28 02:10:39,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:39,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:39,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:39,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:10:39,622 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:39,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1715340814, now seen corresponding path program 1 times [2024-06-28 02:10:39,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:39,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339242115] [2024-06-28 02:10:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:42,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:42,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339242115] [2024-06-28 02:10:42,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339242115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:42,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:42,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:42,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444959963] [2024-06-28 02:10:42,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:42,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:42,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:42,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:42,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 200 transitions, 1861 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:42,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:42,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:42,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:44,834 INFO L124 PetriNetUnfolderBase]: 5386/8260 cut-off events. [2024-06-28 02:10:44,834 INFO L125 PetriNetUnfolderBase]: For 158515/158515 co-relation queries the response was YES. [2024-06-28 02:10:44,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42330 conditions, 8260 events. 5386/8260 cut-off events. For 158515/158515 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 48882 event pairs, 1110 based on Foata normal form. 16/8273 useless extension candidates. Maximal degree in co-relation 42265. Up to 6945 conditions per place. [2024-06-28 02:10:44,901 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 238 selfloop transitions, 36 changer transitions 0/281 dead transitions. [2024-06-28 02:10:44,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 281 transitions, 2789 flow [2024-06-28 02:10:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:10:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:10:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-28 02:10:44,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2024-06-28 02:10:44,904 INFO L175 Difference]: Start difference. First operand has 142 places, 200 transitions, 1861 flow. Second operand 9 states and 236 transitions. [2024-06-28 02:10:44,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 281 transitions, 2789 flow [2024-06-28 02:10:45,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 281 transitions, 2706 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 02:10:45,093 INFO L231 Difference]: Finished difference. Result has 147 places, 202 transitions, 1902 flow [2024-06-28 02:10:45,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1902, PETRI_PLACES=147, PETRI_TRANSITIONS=202} [2024-06-28 02:10:45,094 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-28 02:10:45,094 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 202 transitions, 1902 flow [2024-06-28 02:10:45,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:45,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:45,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:45,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:10:45,094 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:45,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash 93076172, now seen corresponding path program 2 times [2024-06-28 02:10:45,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:45,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102788691] [2024-06-28 02:10:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:45,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:47,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:47,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102788691] [2024-06-28 02:10:47,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102788691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:10:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046663818] [2024-06-28 02:10:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:10:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:10:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:10:47,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:47,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 202 transitions, 1902 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:47,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:47,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:47,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:50,044 INFO L124 PetriNetUnfolderBase]: 5350/8204 cut-off events. [2024-06-28 02:10:50,044 INFO L125 PetriNetUnfolderBase]: For 155055/155055 co-relation queries the response was YES. [2024-06-28 02:10:50,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41614 conditions, 8204 events. 5350/8204 cut-off events. For 155055/155055 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 48338 event pairs, 1456 based on Foata normal form. 20/8221 useless extension candidates. Maximal degree in co-relation 41548. Up to 7287 conditions per place. [2024-06-28 02:10:50,111 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 241 selfloop transitions, 27 changer transitions 0/275 dead transitions. [2024-06-28 02:10:50,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 275 transitions, 2648 flow [2024-06-28 02:10:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:10:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:10:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-28 02:10:50,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-28 02:10:50,114 INFO L175 Difference]: Start difference. First operand has 147 places, 202 transitions, 1902 flow. Second operand 9 states and 229 transitions. [2024-06-28 02:10:50,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 275 transitions, 2648 flow [2024-06-28 02:10:50,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 275 transitions, 2510 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-28 02:10:50,366 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 1826 flow [2024-06-28 02:10:50,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1826, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2024-06-28 02:10:50,366 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-28 02:10:50,367 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 1826 flow [2024-06-28 02:10:50,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:50,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:50,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:10:50,367 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:50,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1501233882, now seen corresponding path program 3 times [2024-06-28 02:10:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:50,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521957285] [2024-06-28 02:10:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:53,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:53,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521957285] [2024-06-28 02:10:53,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521957285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:53,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:53,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:53,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772864901] [2024-06-28 02:10:53,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:53,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:53,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:53,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:53,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:53,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:53,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 1826 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:53,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:53,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:53,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:10:55,846 INFO L124 PetriNetUnfolderBase]: 5540/8516 cut-off events. [2024-06-28 02:10:55,846 INFO L125 PetriNetUnfolderBase]: For 166681/166681 co-relation queries the response was YES. [2024-06-28 02:10:55,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42765 conditions, 8516 events. 5540/8516 cut-off events. For 166681/166681 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 50672 event pairs, 1322 based on Foata normal form. 20/8530 useless extension candidates. Maximal degree in co-relation 42698. Up to 6990 conditions per place. [2024-06-28 02:10:55,923 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 188 selfloop transitions, 81 changer transitions 0/276 dead transitions. [2024-06-28 02:10:55,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 276 transitions, 2636 flow [2024-06-28 02:10:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:10:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:10:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-28 02:10:55,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393518518518519 [2024-06-28 02:10:55,925 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 1826 flow. Second operand 9 states and 233 transitions. [2024-06-28 02:10:55,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 276 transitions, 2636 flow [2024-06-28 02:10:56,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 276 transitions, 2550 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-28 02:10:56,109 INFO L231 Difference]: Finished difference. Result has 150 places, 204 transitions, 1980 flow [2024-06-28 02:10:56,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1980, PETRI_PLACES=150, PETRI_TRANSITIONS=204} [2024-06-28 02:10:56,109 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-28 02:10:56,109 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 204 transitions, 1980 flow [2024-06-28 02:10:56,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:56,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:10:56,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:10:56,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:10:56,110 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:10:56,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:10:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1501086012, now seen corresponding path program 4 times [2024-06-28 02:10:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:10:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097555086] [2024-06-28 02:10:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:10:56,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:10:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:10:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:10:59,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:10:59,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097555086] [2024-06-28 02:10:59,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097555086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:10:59,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:10:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:10:59,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123713460] [2024-06-28 02:10:59,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:10:59,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:10:59,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:10:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:10:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:10:59,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:10:59,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 204 transitions, 1980 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:10:59,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:10:59,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:10:59,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:01,780 INFO L124 PetriNetUnfolderBase]: 5688/8744 cut-off events. [2024-06-28 02:11:01,780 INFO L125 PetriNetUnfolderBase]: For 183816/183816 co-relation queries the response was YES. [2024-06-28 02:11:01,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44951 conditions, 8744 events. 5688/8744 cut-off events. For 183816/183816 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 52205 event pairs, 1298 based on Foata normal form. 16/8754 useless extension candidates. Maximal degree in co-relation 44883. Up to 6988 conditions per place. [2024-06-28 02:11:01,852 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 198 selfloop transitions, 86 changer transitions 0/291 dead transitions. [2024-06-28 02:11:01,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 291 transitions, 2860 flow [2024-06-28 02:11:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:11:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:11:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-28 02:11:01,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:11:01,854 INFO L175 Difference]: Start difference. First operand has 150 places, 204 transitions, 1980 flow. Second operand 10 states and 260 transitions. [2024-06-28 02:11:01,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 291 transitions, 2860 flow [2024-06-28 02:11:02,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 291 transitions, 2648 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-28 02:11:02,141 INFO L231 Difference]: Finished difference. Result has 153 places, 206 transitions, 2021 flow [2024-06-28 02:11:02,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1768, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2021, PETRI_PLACES=153, PETRI_TRANSITIONS=206} [2024-06-28 02:11:02,141 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 101 predicate places. [2024-06-28 02:11:02,141 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 206 transitions, 2021 flow [2024-06-28 02:11:02,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:02,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:02,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:02,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:11:02,142 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:02,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:02,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1308420562, now seen corresponding path program 5 times [2024-06-28 02:11:02,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:02,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466500839] [2024-06-28 02:11:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:02,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:05,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:05,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466500839] [2024-06-28 02:11:05,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466500839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:05,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:05,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:11:05,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351037958] [2024-06-28 02:11:05,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:05,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:11:05,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:05,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:11:05,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:11:05,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:05,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 206 transitions, 2021 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:05,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:05,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:05,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:07,731 INFO L124 PetriNetUnfolderBase]: 5878/9055 cut-off events. [2024-06-28 02:11:07,731 INFO L125 PetriNetUnfolderBase]: For 198958/198962 co-relation queries the response was YES. [2024-06-28 02:11:07,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46601 conditions, 9055 events. 5878/9055 cut-off events. For 198958/198962 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 54567 event pairs, 1353 based on Foata normal form. 24/9073 useless extension candidates. Maximal degree in co-relation 46532. Up to 7508 conditions per place. [2024-06-28 02:11:07,794 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 182 selfloop transitions, 83 changer transitions 0/272 dead transitions. [2024-06-28 02:11:07,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 272 transitions, 2809 flow [2024-06-28 02:11:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 02:11:07,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-28 02:11:07,797 INFO L175 Difference]: Start difference. First operand has 153 places, 206 transitions, 2021 flow. Second operand 8 states and 210 transitions. [2024-06-28 02:11:07,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 272 transitions, 2809 flow [2024-06-28 02:11:08,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 272 transitions, 2574 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-28 02:11:08,034 INFO L231 Difference]: Finished difference. Result has 153 places, 208 transitions, 2038 flow [2024-06-28 02:11:08,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2038, PETRI_PLACES=153, PETRI_TRANSITIONS=208} [2024-06-28 02:11:08,035 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 101 predicate places. [2024-06-28 02:11:08,035 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 208 transitions, 2038 flow [2024-06-28 02:11:08,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:08,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:08,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:08,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:11:08,036 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:08,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1300796050, now seen corresponding path program 1 times [2024-06-28 02:11:08,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105885884] [2024-06-28 02:11:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:08,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:11,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:11,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105885884] [2024-06-28 02:11:11,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105885884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:11,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:11,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:11,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778131622] [2024-06-28 02:11:11,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:11,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:11,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:11,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:11,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:11,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 208 transitions, 2038 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:11,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:11,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:11,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:14,180 INFO L124 PetriNetUnfolderBase]: 6210/9567 cut-off events. [2024-06-28 02:11:14,180 INFO L125 PetriNetUnfolderBase]: For 230032/230036 co-relation queries the response was YES. [2024-06-28 02:11:14,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50364 conditions, 9567 events. 6210/9567 cut-off events. For 230032/230036 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 58300 event pairs, 1401 based on Foata normal form. 16/9577 useless extension candidates. Maximal degree in co-relation 50294. Up to 7024 conditions per place. [2024-06-28 02:11:14,280 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 182 selfloop transitions, 91 changer transitions 0/280 dead transitions. [2024-06-28 02:11:14,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 280 transitions, 3068 flow [2024-06-28 02:11:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-28 02:11:14,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-06-28 02:11:14,287 INFO L175 Difference]: Start difference. First operand has 153 places, 208 transitions, 2038 flow. Second operand 8 states and 213 transitions. [2024-06-28 02:11:14,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 280 transitions, 3068 flow [2024-06-28 02:11:14,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 280 transitions, 2844 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-28 02:11:14,649 INFO L231 Difference]: Finished difference. Result has 155 places, 212 transitions, 2163 flow [2024-06-28 02:11:14,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1814, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2163, PETRI_PLACES=155, PETRI_TRANSITIONS=212} [2024-06-28 02:11:14,650 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 103 predicate places. [2024-06-28 02:11:14,650 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 212 transitions, 2163 flow [2024-06-28 02:11:14,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:14,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:14,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:14,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:11:14,651 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:14,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash -553380926, now seen corresponding path program 1 times [2024-06-28 02:11:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:14,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189067214] [2024-06-28 02:11:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:17,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:17,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189067214] [2024-06-28 02:11:17,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189067214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:17,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:17,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:11:17,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531954171] [2024-06-28 02:11:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:17,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:11:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:11:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:11:17,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:17,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 212 transitions, 2163 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:17,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:17,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:17,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:19,693 INFO L124 PetriNetUnfolderBase]: 6302/9670 cut-off events. [2024-06-28 02:11:19,694 INFO L125 PetriNetUnfolderBase]: For 228206/228206 co-relation queries the response was YES. [2024-06-28 02:11:19,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50650 conditions, 9670 events. 6302/9670 cut-off events. For 228206/228206 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 58872 event pairs, 1616 based on Foata normal form. 4/9671 useless extension candidates. Maximal degree in co-relation 50579. Up to 8732 conditions per place. [2024-06-28 02:11:19,787 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 233 selfloop transitions, 31 changer transitions 0/271 dead transitions. [2024-06-28 02:11:19,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 271 transitions, 3129 flow [2024-06-28 02:11:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:11:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:11:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:11:19,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-28 02:11:19,790 INFO L175 Difference]: Start difference. First operand has 155 places, 212 transitions, 2163 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:11:19,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 271 transitions, 3129 flow [2024-06-28 02:11:20,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 271 transitions, 2958 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-28 02:11:20,131 INFO L231 Difference]: Finished difference. Result has 158 places, 218 transitions, 2118 flow [2024-06-28 02:11:20,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2118, PETRI_PLACES=158, PETRI_TRANSITIONS=218} [2024-06-28 02:11:20,132 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-28 02:11:20,132 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 218 transitions, 2118 flow [2024-06-28 02:11:20,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:20,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:20,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:20,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:11:20,133 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:20,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1999769140, now seen corresponding path program 6 times [2024-06-28 02:11:20,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:20,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667714871] [2024-06-28 02:11:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:20,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:22,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667714871] [2024-06-28 02:11:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667714871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:22,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:22,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:11:22,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245720376] [2024-06-28 02:11:22,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:22,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:11:22,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:22,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:11:22,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:11:22,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:22,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 218 transitions, 2118 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:22,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:22,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:22,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:25,371 INFO L124 PetriNetUnfolderBase]: 6492/9879 cut-off events. [2024-06-28 02:11:25,371 INFO L125 PetriNetUnfolderBase]: For 246600/246612 co-relation queries the response was YES. [2024-06-28 02:11:25,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52834 conditions, 9879 events. 6492/9879 cut-off events. For 246600/246612 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 60057 event pairs, 1545 based on Foata normal form. 28/9887 useless extension candidates. Maximal degree in co-relation 52761. Up to 8434 conditions per place. [2024-06-28 02:11:25,459 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 192 selfloop transitions, 81 changer transitions 0/280 dead transitions. [2024-06-28 02:11:25,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 280 transitions, 2926 flow [2024-06-28 02:11:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:25,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:11:25,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-28 02:11:25,461 INFO L175 Difference]: Start difference. First operand has 158 places, 218 transitions, 2118 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:11:25,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 280 transitions, 2926 flow [2024-06-28 02:11:25,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 280 transitions, 2893 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 02:11:25,927 INFO L231 Difference]: Finished difference. Result has 163 places, 220 transitions, 2341 flow [2024-06-28 02:11:25,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2341, PETRI_PLACES=163, PETRI_TRANSITIONS=220} [2024-06-28 02:11:25,928 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-28 02:11:25,928 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 220 transitions, 2341 flow [2024-06-28 02:11:25,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:25,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:25,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:25,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:11:25,929 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:25,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:25,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1988400402, now seen corresponding path program 7 times [2024-06-28 02:11:25,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:25,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125074765] [2024-06-28 02:11:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:28,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:28,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125074765] [2024-06-28 02:11:28,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125074765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:28,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:28,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:28,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970220496] [2024-06-28 02:11:28,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:28,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:28,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:28,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:29,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:29,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 220 transitions, 2341 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:29,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:29,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:29,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:31,906 INFO L124 PetriNetUnfolderBase]: 6456/9820 cut-off events. [2024-06-28 02:11:31,906 INFO L125 PetriNetUnfolderBase]: For 248625/248625 co-relation queries the response was YES. [2024-06-28 02:11:31,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52897 conditions, 9820 events. 6456/9820 cut-off events. For 248625/248625 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 59495 event pairs, 1628 based on Foata normal form. 20/9812 useless extension candidates. Maximal degree in co-relation 52822. Up to 8378 conditions per place. [2024-06-28 02:11:31,991 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 197 selfloop transitions, 84 changer transitions 0/288 dead transitions. [2024-06-28 02:11:31,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 288 transitions, 3105 flow [2024-06-28 02:11:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:11:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:11:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-28 02:11:31,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-28 02:11:31,993 INFO L175 Difference]: Start difference. First operand has 163 places, 220 transitions, 2341 flow. Second operand 9 states and 227 transitions. [2024-06-28 02:11:31,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 288 transitions, 3105 flow [2024-06-28 02:11:32,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 288 transitions, 2843 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-28 02:11:32,470 INFO L231 Difference]: Finished difference. Result has 166 places, 220 transitions, 2255 flow [2024-06-28 02:11:32,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2255, PETRI_PLACES=166, PETRI_TRANSITIONS=220} [2024-06-28 02:11:32,470 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 114 predicate places. [2024-06-28 02:11:32,471 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 220 transitions, 2255 flow [2024-06-28 02:11:32,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:32,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:32,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:32,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:11:32,471 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:32,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash 411894258, now seen corresponding path program 8 times [2024-06-28 02:11:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:32,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163783139] [2024-06-28 02:11:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:32,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:35,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163783139] [2024-06-28 02:11:35,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163783139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:35,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:35,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:35,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040783699] [2024-06-28 02:11:35,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:35,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:35,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:35,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:35,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 220 transitions, 2255 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:35,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:35,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:35,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:38,686 INFO L124 PetriNetUnfolderBase]: 6504/9900 cut-off events. [2024-06-28 02:11:38,686 INFO L125 PetriNetUnfolderBase]: For 233128/233128 co-relation queries the response was YES. [2024-06-28 02:11:38,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51738 conditions, 9900 events. 6504/9900 cut-off events. For 233128/233128 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60126 event pairs, 1600 based on Foata normal form. 16/9888 useless extension candidates. Maximal degree in co-relation 51662. Up to 8228 conditions per place. [2024-06-28 02:11:38,779 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 207 selfloop transitions, 89 changer transitions 0/303 dead transitions. [2024-06-28 02:11:38,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 303 transitions, 3171 flow [2024-06-28 02:11:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:11:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:11:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-28 02:11:38,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-28 02:11:38,799 INFO L175 Difference]: Start difference. First operand has 166 places, 220 transitions, 2255 flow. Second operand 10 states and 254 transitions. [2024-06-28 02:11:38,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 303 transitions, 3171 flow [2024-06-28 02:11:39,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 303 transitions, 2969 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 02:11:39,146 INFO L231 Difference]: Finished difference. Result has 168 places, 222 transitions, 2328 flow [2024-06-28 02:11:39,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2328, PETRI_PLACES=168, PETRI_TRANSITIONS=222} [2024-06-28 02:11:39,147 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 116 predicate places. [2024-06-28 02:11:39,147 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 222 transitions, 2328 flow [2024-06-28 02:11:39,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:39,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:39,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:39,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:11:39,148 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:39,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:39,149 INFO L85 PathProgramCache]: Analyzing trace with hash 23916100, now seen corresponding path program 2 times [2024-06-28 02:11:39,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:39,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233934268] [2024-06-28 02:11:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:39,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:42,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:42,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233934268] [2024-06-28 02:11:42,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233934268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:42,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:42,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925866166] [2024-06-28 02:11:42,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:42,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:42,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:42,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:42,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 222 transitions, 2328 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:42,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:42,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:42,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:45,220 INFO L124 PetriNetUnfolderBase]: 6610/10103 cut-off events. [2024-06-28 02:11:45,220 INFO L125 PetriNetUnfolderBase]: For 251801/251813 co-relation queries the response was YES. [2024-06-28 02:11:45,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53294 conditions, 10103 events. 6610/10103 cut-off events. For 251801/251813 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 62112 event pairs, 1539 based on Foata normal form. 20/10103 useless extension candidates. Maximal degree in co-relation 53217. Up to 8434 conditions per place. [2024-06-28 02:11:45,301 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 196 selfloop transitions, 84 changer transitions 0/287 dead transitions. [2024-06-28 02:11:45,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 287 transitions, 3174 flow [2024-06-28 02:11:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:45,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-28 02:11:45,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2024-06-28 02:11:45,303 INFO L175 Difference]: Start difference. First operand has 168 places, 222 transitions, 2328 flow. Second operand 8 states and 206 transitions. [2024-06-28 02:11:45,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 287 transitions, 3174 flow [2024-06-28 02:11:45,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 287 transitions, 2917 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-28 02:11:45,654 INFO L231 Difference]: Finished difference. Result has 168 places, 224 transitions, 2340 flow [2024-06-28 02:11:45,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2340, PETRI_PLACES=168, PETRI_TRANSITIONS=224} [2024-06-28 02:11:45,654 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 116 predicate places. [2024-06-28 02:11:45,654 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 224 transitions, 2340 flow [2024-06-28 02:11:45,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:45,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:45,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:45,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:11:45,655 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:45,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash 464240746, now seen corresponding path program 3 times [2024-06-28 02:11:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:45,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690317834] [2024-06-28 02:11:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:45,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:48,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:48,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690317834] [2024-06-28 02:11:48,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690317834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:48,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:48,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:11:48,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948204612] [2024-06-28 02:11:48,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:48,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:11:48,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:11:48,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:11:48,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:48,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 224 transitions, 2340 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:48,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:48,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:48,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:51,474 INFO L124 PetriNetUnfolderBase]: 6590/10091 cut-off events. [2024-06-28 02:11:51,475 INFO L125 PetriNetUnfolderBase]: For 241578/241590 co-relation queries the response was YES. [2024-06-28 02:11:51,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51889 conditions, 10091 events. 6590/10091 cut-off events. For 241578/241590 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 62035 event pairs, 1402 based on Foata normal form. 20/10091 useless extension candidates. Maximal degree in co-relation 51811. Up to 6972 conditions per place. [2024-06-28 02:11:51,572 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 177 selfloop transitions, 102 changer transitions 0/286 dead transitions. [2024-06-28 02:11:51,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 286 transitions, 3104 flow [2024-06-28 02:11:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:11:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:11:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-28 02:11:51,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-28 02:11:51,574 INFO L175 Difference]: Start difference. First operand has 168 places, 224 transitions, 2340 flow. Second operand 8 states and 204 transitions. [2024-06-28 02:11:51,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 286 transitions, 3104 flow [2024-06-28 02:11:52,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 286 transitions, 2861 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-28 02:11:52,014 INFO L231 Difference]: Finished difference. Result has 169 places, 225 transitions, 2332 flow [2024-06-28 02:11:52,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2332, PETRI_PLACES=169, PETRI_TRANSITIONS=225} [2024-06-28 02:11:52,016 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 117 predicate places. [2024-06-28 02:11:52,016 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 225 transitions, 2332 flow [2024-06-28 02:11:52,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:52,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:52,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:52,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:11:52,017 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:52,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1033000898, now seen corresponding path program 2 times [2024-06-28 02:11:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:52,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238883332] [2024-06-28 02:11:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:52,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:54,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238883332] [2024-06-28 02:11:54,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238883332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:54,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:54,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:11:54,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281031290] [2024-06-28 02:11:54,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:54,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:11:54,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:11:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:11:54,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:54,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 225 transitions, 2332 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:54,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:54,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:54,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:11:56,753 INFO L124 PetriNetUnfolderBase]: 6682/10311 cut-off events. [2024-06-28 02:11:56,753 INFO L125 PetriNetUnfolderBase]: For 240655/240655 co-relation queries the response was YES. [2024-06-28 02:11:56,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52640 conditions, 10311 events. 6682/10311 cut-off events. For 240655/240655 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 63884 event pairs, 1720 based on Foata normal form. 4/10312 useless extension candidates. Maximal degree in co-relation 52561. Up to 9564 conditions per place. [2024-06-28 02:11:56,847 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 242 selfloop transitions, 17 changer transitions 0/266 dead transitions. [2024-06-28 02:11:56,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 266 transitions, 3116 flow [2024-06-28 02:11:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:11:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:11:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-28 02:11:56,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 02:11:56,849 INFO L175 Difference]: Start difference. First operand has 169 places, 225 transitions, 2332 flow. Second operand 7 states and 162 transitions. [2024-06-28 02:11:56,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 266 transitions, 3116 flow [2024-06-28 02:11:57,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 266 transitions, 2833 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-28 02:11:57,215 INFO L231 Difference]: Finished difference. Result has 170 places, 228 transitions, 2123 flow [2024-06-28 02:11:57,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2123, PETRI_PLACES=170, PETRI_TRANSITIONS=228} [2024-06-28 02:11:57,216 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-28 02:11:57,216 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 228 transitions, 2123 flow [2024-06-28 02:11:57,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:57,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:11:57,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:11:57,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:11:57,217 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:11:57,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:11:57,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1033013918, now seen corresponding path program 3 times [2024-06-28 02:11:57,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:11:57,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538145907] [2024-06-28 02:11:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:11:57,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:11:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:11:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:11:59,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:11:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538145907] [2024-06-28 02:11:59,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538145907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:11:59,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:11:59,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:11:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52445023] [2024-06-28 02:11:59,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:11:59,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:11:59,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:11:59,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:11:59,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:11:59,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:11:59,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 228 transitions, 2123 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:11:59,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:11:59,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:11:59,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:01,802 INFO L124 PetriNetUnfolderBase]: 6670/10267 cut-off events. [2024-06-28 02:12:01,802 INFO L125 PetriNetUnfolderBase]: For 230931/230931 co-relation queries the response was YES. [2024-06-28 02:12:01,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50815 conditions, 10267 events. 6670/10267 cut-off events. For 230931/230931 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 63469 event pairs, 1735 based on Foata normal form. 4/10259 useless extension candidates. Maximal degree in co-relation 50735. Up to 9236 conditions per place. [2024-06-28 02:12:01,904 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 231 selfloop transitions, 34 changer transitions 0/272 dead transitions. [2024-06-28 02:12:01,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 272 transitions, 2935 flow [2024-06-28 02:12:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:01,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:12:01,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-28 02:12:01,906 INFO L175 Difference]: Start difference. First operand has 170 places, 228 transitions, 2123 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:12:01,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 272 transitions, 2935 flow [2024-06-28 02:12:02,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 272 transitions, 2867 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 02:12:02,299 INFO L231 Difference]: Finished difference. Result has 170 places, 228 transitions, 2129 flow [2024-06-28 02:12:02,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2129, PETRI_PLACES=170, PETRI_TRANSITIONS=228} [2024-06-28 02:12:02,301 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-28 02:12:02,301 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 228 transitions, 2129 flow [2024-06-28 02:12:02,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:02,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:02,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:02,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:12:02,302 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:02,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash -346632378, now seen corresponding path program 1 times [2024-06-28 02:12:02,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:02,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582976913] [2024-06-28 02:12:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:04,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582976913] [2024-06-28 02:12:04,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582976913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:04,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:04,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:12:04,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092653835] [2024-06-28 02:12:04,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:04,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:12:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:04,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:12:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:12:04,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:12:04,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 228 transitions, 2129 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:04,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:04,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:12:04,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:06,454 INFO L124 PetriNetUnfolderBase]: 6244/9830 cut-off events. [2024-06-28 02:12:06,454 INFO L125 PetriNetUnfolderBase]: For 200875/200879 co-relation queries the response was YES. [2024-06-28 02:12:06,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47444 conditions, 9830 events. 6244/9830 cut-off events. For 200875/200879 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 62875 event pairs, 1441 based on Foata normal form. 7/9807 useless extension candidates. Maximal degree in co-relation 47365. Up to 8577 conditions per place. [2024-06-28 02:12:06,556 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 229 selfloop transitions, 31 changer transitions 0/271 dead transitions. [2024-06-28 02:12:06,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 271 transitions, 3054 flow [2024-06-28 02:12:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:12:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:12:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-28 02:12:06,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:12:06,557 INFO L175 Difference]: Start difference. First operand has 170 places, 228 transitions, 2129 flow. Second operand 6 states and 156 transitions. [2024-06-28 02:12:06,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 271 transitions, 3054 flow [2024-06-28 02:12:06,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 271 transitions, 2959 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 02:12:06,953 INFO L231 Difference]: Finished difference. Result has 171 places, 232 transitions, 2202 flow [2024-06-28 02:12:06,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2202, PETRI_PLACES=171, PETRI_TRANSITIONS=232} [2024-06-28 02:12:06,954 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 119 predicate places. [2024-06-28 02:12:06,954 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 232 transitions, 2202 flow [2024-06-28 02:12:06,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:06,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:06,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:06,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:12:06,955 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:06,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1587376804, now seen corresponding path program 2 times [2024-06-28 02:12:06,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:06,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017305303] [2024-06-28 02:12:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:06,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:09,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017305303] [2024-06-28 02:12:09,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017305303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:09,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:09,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:09,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602356407] [2024-06-28 02:12:09,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:09,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:09,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:09,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:12:09,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 232 transitions, 2202 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:09,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:09,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:12:09,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:11,536 INFO L124 PetriNetUnfolderBase]: 6300/9918 cut-off events. [2024-06-28 02:12:11,537 INFO L125 PetriNetUnfolderBase]: For 204891/204892 co-relation queries the response was YES. [2024-06-28 02:12:11,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48134 conditions, 9918 events. 6300/9918 cut-off events. For 204891/204892 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 63285 event pairs, 1518 based on Foata normal form. 5/9892 useless extension candidates. Maximal degree in co-relation 48053. Up to 8635 conditions per place. [2024-06-28 02:12:11,633 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 231 selfloop transitions, 39 changer transitions 0/281 dead transitions. [2024-06-28 02:12:11,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 281 transitions, 3124 flow [2024-06-28 02:12:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-28 02:12:11,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2024-06-28 02:12:11,635 INFO L175 Difference]: Start difference. First operand has 171 places, 232 transitions, 2202 flow. Second operand 7 states and 179 transitions. [2024-06-28 02:12:11,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 281 transitions, 3124 flow [2024-06-28 02:12:12,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 281 transitions, 3034 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:12,056 INFO L231 Difference]: Finished difference. Result has 174 places, 236 transitions, 2289 flow [2024-06-28 02:12:12,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2289, PETRI_PLACES=174, PETRI_TRANSITIONS=236} [2024-06-28 02:12:12,061 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-28 02:12:12,061 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 236 transitions, 2289 flow [2024-06-28 02:12:12,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:12,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:12,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:12,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:12:12,062 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:12,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1225168058, now seen corresponding path program 3 times [2024-06-28 02:12:12,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:12,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779662691] [2024-06-28 02:12:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:12,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:14,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:14,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779662691] [2024-06-28 02:12:14,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779662691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:14,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:14,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:12:14,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024334966] [2024-06-28 02:12:14,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:14,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:12:14,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:14,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:12:14,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:12:14,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2024-06-28 02:12:14,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 236 transitions, 2289 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:14,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:14,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2024-06-28 02:12:14,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:16,330 INFO L124 PetriNetUnfolderBase]: 6267/9899 cut-off events. [2024-06-28 02:12:16,330 INFO L125 PetriNetUnfolderBase]: For 206974/206975 co-relation queries the response was YES. [2024-06-28 02:12:16,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47926 conditions, 9899 events. 6267/9899 cut-off events. For 206974/206975 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 63439 event pairs, 1517 based on Foata normal form. 7/9876 useless extension candidates. Maximal degree in co-relation 47845. Up to 8888 conditions per place. [2024-06-28 02:12:16,437 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 241 selfloop transitions, 21 changer transitions 0/273 dead transitions. [2024-06-28 02:12:16,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 273 transitions, 2951 flow [2024-06-28 02:12:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-28 02:12:16,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029761904761905 [2024-06-28 02:12:16,439 INFO L175 Difference]: Start difference. First operand has 174 places, 236 transitions, 2289 flow. Second operand 7 states and 169 transitions. [2024-06-28 02:12:16,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 273 transitions, 2951 flow [2024-06-28 02:12:16,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 273 transitions, 2815 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:16,861 INFO L231 Difference]: Finished difference. Result has 177 places, 236 transitions, 2202 flow [2024-06-28 02:12:16,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2202, PETRI_PLACES=177, PETRI_TRANSITIONS=236} [2024-06-28 02:12:16,862 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 125 predicate places. [2024-06-28 02:12:16,862 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 236 transitions, 2202 flow [2024-06-28 02:12:16,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:16,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:16,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:16,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:12:16,862 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:16,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash -169134624, now seen corresponding path program 1 times [2024-06-28 02:12:16,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:16,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404423822] [2024-06-28 02:12:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:20,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404423822] [2024-06-28 02:12:20,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404423822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:20,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:20,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:12:20,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117431769] [2024-06-28 02:12:20,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:20,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:12:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:20,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:12:20,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:12:20,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:12:20,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 236 transitions, 2202 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:20,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:20,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:12:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:22,681 INFO L124 PetriNetUnfolderBase]: 6797/10512 cut-off events. [2024-06-28 02:12:22,681 INFO L125 PetriNetUnfolderBase]: For 243136/243136 co-relation queries the response was YES. [2024-06-28 02:12:22,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51720 conditions, 10512 events. 6797/10512 cut-off events. For 243136/243136 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 65409 event pairs, 1756 based on Foata normal form. 2/10511 useless extension candidates. Maximal degree in co-relation 51637. Up to 9767 conditions per place. [2024-06-28 02:12:22,768 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 252 selfloop transitions, 16 changer transitions 0/275 dead transitions. [2024-06-28 02:12:22,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 275 transitions, 2998 flow [2024-06-28 02:12:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:22,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 02:12:22,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-28 02:12:22,770 INFO L175 Difference]: Start difference. First operand has 177 places, 236 transitions, 2202 flow. Second operand 7 states and 160 transitions. [2024-06-28 02:12:22,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 275 transitions, 2998 flow [2024-06-28 02:12:23,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 275 transitions, 2918 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 02:12:23,195 INFO L231 Difference]: Finished difference. Result has 178 places, 238 transitions, 2189 flow [2024-06-28 02:12:23,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2189, PETRI_PLACES=178, PETRI_TRANSITIONS=238} [2024-06-28 02:12:23,195 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 126 predicate places. [2024-06-28 02:12:23,195 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 238 transitions, 2189 flow [2024-06-28 02:12:23,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:23,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:23,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:23,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:12:23,196 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:23,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash -361443795, now seen corresponding path program 1 times [2024-06-28 02:12:23,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:23,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374961010] [2024-06-28 02:12:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:23,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:25,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:25,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374961010] [2024-06-28 02:12:25,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374961010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:25,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:25,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:25,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623318202] [2024-06-28 02:12:25,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:25,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:25,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:25,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:25,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:12:25,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 238 transitions, 2189 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:25,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:25,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:12:25,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:28,217 INFO L124 PetriNetUnfolderBase]: 6851/10498 cut-off events. [2024-06-28 02:12:28,218 INFO L125 PetriNetUnfolderBase]: For 252773/252773 co-relation queries the response was YES. [2024-06-28 02:12:28,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52457 conditions, 10498 events. 6851/10498 cut-off events. For 252773/252773 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 64431 event pairs, 1581 based on Foata normal form. 1/10493 useless extension candidates. Maximal degree in co-relation 52373. Up to 9083 conditions per place. [2024-06-28 02:12:28,317 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 263 selfloop transitions, 57 changer transitions 0/327 dead transitions. [2024-06-28 02:12:28,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 327 transitions, 3820 flow [2024-06-28 02:12:28,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-28 02:12:28,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-28 02:12:28,319 INFO L175 Difference]: Start difference. First operand has 178 places, 238 transitions, 2189 flow. Second operand 7 states and 182 transitions. [2024-06-28 02:12:28,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 327 transitions, 3820 flow [2024-06-28 02:12:28,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 327 transitions, 3781 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 02:12:28,811 INFO L231 Difference]: Finished difference. Result has 183 places, 265 transitions, 2703 flow [2024-06-28 02:12:28,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2703, PETRI_PLACES=183, PETRI_TRANSITIONS=265} [2024-06-28 02:12:28,812 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 131 predicate places. [2024-06-28 02:12:28,812 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 265 transitions, 2703 flow [2024-06-28 02:12:28,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:28,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:28,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:28,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:12:28,812 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:28,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:28,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1510001553, now seen corresponding path program 2 times [2024-06-28 02:12:28,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:28,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442210903] [2024-06-28 02:12:28,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:28,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442210903] [2024-06-28 02:12:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442210903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:31,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:31,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016136102] [2024-06-28 02:12:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:31,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:31,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:12:31,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 265 transitions, 2703 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:31,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:31,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:12:31,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:33,658 INFO L124 PetriNetUnfolderBase]: 7001/10774 cut-off events. [2024-06-28 02:12:33,658 INFO L125 PetriNetUnfolderBase]: For 277208/277208 co-relation queries the response was YES. [2024-06-28 02:12:33,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56731 conditions, 10774 events. 7001/10774 cut-off events. For 277208/277208 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 66843 event pairs, 1756 based on Foata normal form. 2/10773 useless extension candidates. Maximal degree in co-relation 56643. Up to 9852 conditions per place. [2024-06-28 02:12:33,772 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 284 selfloop transitions, 43 changer transitions 0/334 dead transitions. [2024-06-28 02:12:33,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 334 transitions, 4010 flow [2024-06-28 02:12:33,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:33,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-28 02:12:33,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-28 02:12:33,774 INFO L175 Difference]: Start difference. First operand has 183 places, 265 transitions, 2703 flow. Second operand 8 states and 196 transitions. [2024-06-28 02:12:33,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 334 transitions, 4010 flow [2024-06-28 02:12:34,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 334 transitions, 3966 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-28 02:12:34,418 INFO L231 Difference]: Finished difference. Result has 191 places, 279 transitions, 3034 flow [2024-06-28 02:12:34,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3034, PETRI_PLACES=191, PETRI_TRANSITIONS=279} [2024-06-28 02:12:34,419 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 139 predicate places. [2024-06-28 02:12:34,419 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 279 transitions, 3034 flow [2024-06-28 02:12:34,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:34,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:34,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:34,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:12:34,419 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:34,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash -133542645, now seen corresponding path program 3 times [2024-06-28 02:12:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:34,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225272679] [2024-06-28 02:12:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:34,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:36,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225272679] [2024-06-28 02:12:36,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225272679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:36,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:36,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050679763] [2024-06-28 02:12:36,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:36,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:36,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:36,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:36,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:12:36,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 279 transitions, 3034 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:36,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:36,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:12:36,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:39,597 INFO L124 PetriNetUnfolderBase]: 7024/10723 cut-off events. [2024-06-28 02:12:39,598 INFO L125 PetriNetUnfolderBase]: For 300415/300415 co-relation queries the response was YES. [2024-06-28 02:12:39,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59028 conditions, 10723 events. 7024/10723 cut-off events. For 300415/300415 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 65728 event pairs, 1646 based on Foata normal form. 1/10705 useless extension candidates. Maximal degree in co-relation 58936. Up to 9261 conditions per place. [2024-06-28 02:12:39,706 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 270 selfloop transitions, 71 changer transitions 0/348 dead transitions. [2024-06-28 02:12:39,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 348 transitions, 4772 flow [2024-06-28 02:12:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:39,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-28 02:12:39,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-28 02:12:39,708 INFO L175 Difference]: Start difference. First operand has 191 places, 279 transitions, 3034 flow. Second operand 7 states and 177 transitions. [2024-06-28 02:12:39,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 348 transitions, 4772 flow [2024-06-28 02:12:40,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 348 transitions, 4533 flow, removed 100 selfloop flow, removed 4 redundant places. [2024-06-28 02:12:40,263 INFO L231 Difference]: Finished difference. Result has 196 places, 290 transitions, 3267 flow [2024-06-28 02:12:40,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3267, PETRI_PLACES=196, PETRI_TRANSITIONS=290} [2024-06-28 02:12:40,264 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2024-06-28 02:12:40,264 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 290 transitions, 3267 flow [2024-06-28 02:12:40,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:40,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:40,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:40,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:12:40,264 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:40,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2143010713, now seen corresponding path program 4 times [2024-06-28 02:12:40,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:40,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740979105] [2024-06-28 02:12:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:40,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:42,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:42,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740979105] [2024-06-28 02:12:42,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740979105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:42,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728775276] [2024-06-28 02:12:42,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:42,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:42,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:42,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:12:42,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 290 transitions, 3267 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:42,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:42,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:12:42,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:45,397 INFO L124 PetriNetUnfolderBase]: 7047/10774 cut-off events. [2024-06-28 02:12:45,397 INFO L125 PetriNetUnfolderBase]: For 313163/313163 co-relation queries the response was YES. [2024-06-28 02:12:45,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60354 conditions, 10774 events. 7047/10774 cut-off events. For 313163/313163 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 66197 event pairs, 1642 based on Foata normal form. 1/10756 useless extension candidates. Maximal degree in co-relation 60258. Up to 9277 conditions per place. [2024-06-28 02:12:45,503 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 262 selfloop transitions, 77 changer transitions 0/346 dead transitions. [2024-06-28 02:12:45,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 346 transitions, 4689 flow [2024-06-28 02:12:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:12:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:12:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-28 02:12:45,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-28 02:12:45,505 INFO L175 Difference]: Start difference. First operand has 196 places, 290 transitions, 3267 flow. Second operand 7 states and 172 transitions. [2024-06-28 02:12:45,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 346 transitions, 4689 flow [2024-06-28 02:12:46,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 346 transitions, 4637 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-28 02:12:46,154 INFO L231 Difference]: Finished difference. Result has 202 places, 294 transitions, 3448 flow [2024-06-28 02:12:46,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3448, PETRI_PLACES=202, PETRI_TRANSITIONS=294} [2024-06-28 02:12:46,154 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 150 predicate places. [2024-06-28 02:12:46,154 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 294 transitions, 3448 flow [2024-06-28 02:12:46,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:46,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:46,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:46,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:12:46,155 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:46,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:46,155 INFO L85 PathProgramCache]: Analyzing trace with hash 674489339, now seen corresponding path program 5 times [2024-06-28 02:12:46,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:46,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983437631] [2024-06-28 02:12:46,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:46,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:48,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:48,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983437631] [2024-06-28 02:12:48,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983437631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:48,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:48,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444196781] [2024-06-28 02:12:48,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:48,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:48,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:48,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:48,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:12:48,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 294 transitions, 3448 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:48,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:48,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:12:48,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:50,934 INFO L124 PetriNetUnfolderBase]: 7184/11036 cut-off events. [2024-06-28 02:12:50,934 INFO L125 PetriNetUnfolderBase]: For 328492/328492 co-relation queries the response was YES. [2024-06-28 02:12:51,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62709 conditions, 11036 events. 7184/11036 cut-off events. For 328492/328492 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 68743 event pairs, 1748 based on Foata normal form. 1/11025 useless extension candidates. Maximal degree in co-relation 62610. Up to 9925 conditions per place. [2024-06-28 02:12:51,042 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 288 selfloop transitions, 67 changer transitions 0/362 dead transitions. [2024-06-28 02:12:51,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 362 transitions, 5017 flow [2024-06-28 02:12:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:12:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:12:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:12:51,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973958333333333 [2024-06-28 02:12:51,044 INFO L175 Difference]: Start difference. First operand has 202 places, 294 transitions, 3448 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:12:51,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 362 transitions, 5017 flow [2024-06-28 02:12:51,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 362 transitions, 4851 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-28 02:12:51,866 INFO L231 Difference]: Finished difference. Result has 209 places, 317 transitions, 4012 flow [2024-06-28 02:12:51,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3317, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4012, PETRI_PLACES=209, PETRI_TRANSITIONS=317} [2024-06-28 02:12:51,867 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 157 predicate places. [2024-06-28 02:12:51,867 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 317 transitions, 4012 flow [2024-06-28 02:12:51,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:51,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:51,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:12:51,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:12:51,868 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:51,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash -962512999, now seen corresponding path program 6 times [2024-06-28 02:12:51,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:51,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998321914] [2024-06-28 02:12:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:12:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:12:54,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:12:54,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998321914] [2024-06-28 02:12:54,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998321914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:12:54,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:12:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:12:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973193967] [2024-06-28 02:12:54,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:12:54,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:12:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:12:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:12:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:12:54,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:12:54,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 317 transitions, 4012 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:54,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:12:54,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:12:54,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:12:57,315 INFO L124 PetriNetUnfolderBase]: 7178/11042 cut-off events. [2024-06-28 02:12:57,315 INFO L125 PetriNetUnfolderBase]: For 344060/344060 co-relation queries the response was YES. [2024-06-28 02:12:57,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64158 conditions, 11042 events. 7178/11042 cut-off events. For 344060/344060 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 68882 event pairs, 1754 based on Foata normal form. 2/11032 useless extension candidates. Maximal degree in co-relation 64056. Up to 9921 conditions per place. [2024-06-28 02:12:57,433 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 299 selfloop transitions, 65 changer transitions 0/371 dead transitions. [2024-06-28 02:12:57,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 371 transitions, 5193 flow [2024-06-28 02:12:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:12:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:12:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-28 02:12:57,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 02:12:57,435 INFO L175 Difference]: Start difference. First operand has 209 places, 317 transitions, 4012 flow. Second operand 9 states and 216 transitions. [2024-06-28 02:12:57,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 371 transitions, 5193 flow [2024-06-28 02:12:58,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 371 transitions, 4850 flow, removed 163 selfloop flow, removed 2 redundant places. [2024-06-28 02:12:58,416 INFO L231 Difference]: Finished difference. Result has 216 places, 317 transitions, 3846 flow [2024-06-28 02:12:58,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3705, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3846, PETRI_PLACES=216, PETRI_TRANSITIONS=317} [2024-06-28 02:12:58,416 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 164 predicate places. [2024-06-28 02:12:58,416 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 317 transitions, 3846 flow [2024-06-28 02:12:58,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:12:58,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:12:58,417 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] [2024-06-28 02:12:58,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:12:58,417 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:12:58,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:12:58,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1717815163, now seen corresponding path program 1 times [2024-06-28 02:12:58,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:12:58,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772101049] [2024-06-28 02:12:58,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:12:58,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:12:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:00,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:00,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772101049] [2024-06-28 02:13:00,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772101049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:00,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:00,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:00,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116729496] [2024-06-28 02:13:00,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:00,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:00,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:00,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:00,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:00,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 317 transitions, 3846 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:00,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:00,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:00,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:03,592 INFO L124 PetriNetUnfolderBase]: 7338/11216 cut-off events. [2024-06-28 02:13:03,592 INFO L125 PetriNetUnfolderBase]: For 358110/358114 co-relation queries the response was YES. [2024-06-28 02:13:03,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65408 conditions, 11216 events. 7338/11216 cut-off events. For 358110/358114 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 69318 event pairs, 1592 based on Foata normal form. 6/11216 useless extension candidates. Maximal degree in co-relation 65304. Up to 9563 conditions per place. [2024-06-28 02:13:03,750 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 292 selfloop transitions, 93 changer transitions 0/392 dead transitions. [2024-06-28 02:13:03,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 392 transitions, 5681 flow [2024-06-28 02:13:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:13:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:13:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-28 02:13:03,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-28 02:13:03,752 INFO L175 Difference]: Start difference. First operand has 216 places, 317 transitions, 3846 flow. Second operand 7 states and 184 transitions. [2024-06-28 02:13:03,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 392 transitions, 5681 flow [2024-06-28 02:13:04,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 392 transitions, 5405 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-28 02:13:04,770 INFO L231 Difference]: Finished difference. Result has 218 places, 327 transitions, 4013 flow [2024-06-28 02:13:04,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4013, PETRI_PLACES=218, PETRI_TRANSITIONS=327} [2024-06-28 02:13:04,771 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 166 predicate places. [2024-06-28 02:13:04,771 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 327 transitions, 4013 flow [2024-06-28 02:13:04,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:04,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:04,772 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] [2024-06-28 02:13:04,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:13:04,772 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:04,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash 599580035, now seen corresponding path program 1 times [2024-06-28 02:13:04,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:04,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800558873] [2024-06-28 02:13:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:04,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:07,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:07,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800558873] [2024-06-28 02:13:07,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800558873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:07,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:07,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:07,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86252989] [2024-06-28 02:13:07,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:07,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:07,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:07,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:07,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:07,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:07,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 327 transitions, 4013 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:07,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:07,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:07,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:10,611 INFO L124 PetriNetUnfolderBase]: 7436/11401 cut-off events. [2024-06-28 02:13:10,611 INFO L125 PetriNetUnfolderBase]: For 378428/378428 co-relation queries the response was YES. [2024-06-28 02:13:10,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67093 conditions, 11401 events. 7436/11401 cut-off events. For 378428/378428 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70901 event pairs, 1753 based on Foata normal form. 2/11397 useless extension candidates. Maximal degree in co-relation 66988. Up to 8667 conditions per place. [2024-06-28 02:13:10,743 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 304 selfloop transitions, 104 changer transitions 0/415 dead transitions. [2024-06-28 02:13:10,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 415 transitions, 5932 flow [2024-06-28 02:13:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-28 02:13:10,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-28 02:13:10,744 INFO L175 Difference]: Start difference. First operand has 218 places, 327 transitions, 4013 flow. Second operand 8 states and 210 transitions. [2024-06-28 02:13:10,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 415 transitions, 5932 flow [2024-06-28 02:13:11,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 415 transitions, 5818 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:13:11,779 INFO L231 Difference]: Finished difference. Result has 225 places, 342 transitions, 4417 flow [2024-06-28 02:13:11,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4417, PETRI_PLACES=225, PETRI_TRANSITIONS=342} [2024-06-28 02:13:11,780 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 173 predicate places. [2024-06-28 02:13:11,780 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 342 transitions, 4417 flow [2024-06-28 02:13:11,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:11,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:11,780 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] [2024-06-28 02:13:11,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:13:11,780 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:11,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:11,781 INFO L85 PathProgramCache]: Analyzing trace with hash 599579849, now seen corresponding path program 2 times [2024-06-28 02:13:11,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:11,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895953786] [2024-06-28 02:13:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:14,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:14,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895953786] [2024-06-28 02:13:14,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895953786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:14,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:14,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:14,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128477002] [2024-06-28 02:13:14,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:14,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:14,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:14,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:14,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 342 transitions, 4417 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:14,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:14,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:14,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:17,979 INFO L124 PetriNetUnfolderBase]: 7482/11411 cut-off events. [2024-06-28 02:13:17,980 INFO L125 PetriNetUnfolderBase]: For 404631/404631 co-relation queries the response was YES. [2024-06-28 02:13:18,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70186 conditions, 11411 events. 7482/11411 cut-off events. For 404631/404631 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70458 event pairs, 1600 based on Foata normal form. 2/11407 useless extension candidates. Maximal degree in co-relation 70078. Up to 9735 conditions per place. [2024-06-28 02:13:18,107 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 312 selfloop transitions, 94 changer transitions 0/413 dead transitions. [2024-06-28 02:13:18,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 413 transitions, 5998 flow [2024-06-28 02:13:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 02:13:18,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286458333333334 [2024-06-28 02:13:18,108 INFO L175 Difference]: Start difference. First operand has 225 places, 342 transitions, 4417 flow. Second operand 8 states and 203 transitions. [2024-06-28 02:13:18,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 413 transitions, 5998 flow [2024-06-28 02:13:19,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 413 transitions, 5910 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-28 02:13:19,120 INFO L231 Difference]: Finished difference. Result has 230 places, 346 transitions, 4637 flow [2024-06-28 02:13:19,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4329, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4637, PETRI_PLACES=230, PETRI_TRANSITIONS=346} [2024-06-28 02:13:19,121 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 178 predicate places. [2024-06-28 02:13:19,121 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 346 transitions, 4637 flow [2024-06-28 02:13:19,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:19,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:19,122 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] [2024-06-28 02:13:19,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:13:19,122 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:19,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:19,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1629141253, now seen corresponding path program 2 times [2024-06-28 02:13:19,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:19,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539590489] [2024-06-28 02:13:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:19,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539590489] [2024-06-28 02:13:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539590489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:21,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:21,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:21,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616430381] [2024-06-28 02:13:21,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:21,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:21,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:21,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:21,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:21,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:21,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 346 transitions, 4637 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:21,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:21,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:21,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:24,942 INFO L124 PetriNetUnfolderBase]: 7886/12009 cut-off events. [2024-06-28 02:13:24,943 INFO L125 PetriNetUnfolderBase]: For 452488/452488 co-relation queries the response was YES. [2024-06-28 02:13:25,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76048 conditions, 12009 events. 7886/12009 cut-off events. For 452488/452488 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74381 event pairs, 1752 based on Foata normal form. 4/12010 useless extension candidates. Maximal degree in co-relation 75938. Up to 10421 conditions per place. [2024-06-28 02:13:25,115 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 357 selfloop transitions, 75 changer transitions 0/439 dead transitions. [2024-06-28 02:13:25,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 439 transitions, 6670 flow [2024-06-28 02:13:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:13:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:13:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-28 02:13:25,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2024-06-28 02:13:25,116 INFO L175 Difference]: Start difference. First operand has 230 places, 346 transitions, 4637 flow. Second operand 9 states and 230 transitions. [2024-06-28 02:13:25,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 439 transitions, 6670 flow [2024-06-28 02:13:26,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 439 transitions, 6424 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 02:13:26,399 INFO L231 Difference]: Finished difference. Result has 236 places, 367 transitions, 5103 flow [2024-06-28 02:13:26,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4395, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5103, PETRI_PLACES=236, PETRI_TRANSITIONS=367} [2024-06-28 02:13:26,400 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 184 predicate places. [2024-06-28 02:13:26,400 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 367 transitions, 5103 flow [2024-06-28 02:13:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:26,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:26,400 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] [2024-06-28 02:13:26,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:13:26,400 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:26,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:26,401 INFO L85 PathProgramCache]: Analyzing trace with hash 776948705, now seen corresponding path program 3 times [2024-06-28 02:13:26,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:26,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999537908] [2024-06-28 02:13:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:26,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:28,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999537908] [2024-06-28 02:13:28,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999537908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:28,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:28,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234007217] [2024-06-28 02:13:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:28,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:28,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:28,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:28,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 367 transitions, 5103 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:28,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:28,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:28,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:32,525 INFO L124 PetriNetUnfolderBase]: 7874/11985 cut-off events. [2024-06-28 02:13:32,525 INFO L125 PetriNetUnfolderBase]: For 474702/474702 co-relation queries the response was YES. [2024-06-28 02:13:32,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77731 conditions, 11985 events. 7874/11985 cut-off events. For 474702/474702 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 74158 event pairs, 1747 based on Foata normal form. 4/11986 useless extension candidates. Maximal degree in co-relation 77618. Up to 10415 conditions per place. [2024-06-28 02:13:32,673 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 363 selfloop transitions, 75 changer transitions 0/445 dead transitions. [2024-06-28 02:13:32,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 445 transitions, 6699 flow [2024-06-28 02:13:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:13:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:13:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-28 02:13:32,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-28 02:13:32,675 INFO L175 Difference]: Start difference. First operand has 236 places, 367 transitions, 5103 flow. Second operand 10 states and 251 transitions. [2024-06-28 02:13:32,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 445 transitions, 6699 flow [2024-06-28 02:13:33,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 445 transitions, 6342 flow, removed 153 selfloop flow, removed 4 redundant places. [2024-06-28 02:13:33,794 INFO L231 Difference]: Finished difference. Result has 242 places, 367 transitions, 4907 flow [2024-06-28 02:13:33,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4907, PETRI_PLACES=242, PETRI_TRANSITIONS=367} [2024-06-28 02:13:33,796 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 190 predicate places. [2024-06-28 02:13:33,796 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 367 transitions, 4907 flow [2024-06-28 02:13:33,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:33,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:33,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:13:33,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:13:33,796 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:33,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:33,797 INFO L85 PathProgramCache]: Analyzing trace with hash 776711369, now seen corresponding path program 3 times [2024-06-28 02:13:33,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:33,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315879985] [2024-06-28 02:13:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:36,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:36,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315879985] [2024-06-28 02:13:36,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315879985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:36,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:36,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:13:36,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781560941] [2024-06-28 02:13:36,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:36,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:13:36,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:36,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:13:36,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:13:36,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:36,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 367 transitions, 4907 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:36,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:36,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:36,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:39,203 INFO L124 PetriNetUnfolderBase]: 7862/11913 cut-off events. [2024-06-28 02:13:39,204 INFO L125 PetriNetUnfolderBase]: For 466188/466188 co-relation queries the response was YES. [2024-06-28 02:13:39,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76539 conditions, 11913 events. 7862/11913 cut-off events. For 466188/466188 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 73815 event pairs, 1834 based on Foata normal form. 4/11914 useless extension candidates. Maximal degree in co-relation 76424. Up to 11019 conditions per place. [2024-06-28 02:13:39,400 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 370 selfloop transitions, 43 changer transitions 0/420 dead transitions. [2024-06-28 02:13:39,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 420 transitions, 5951 flow [2024-06-28 02:13:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 02:13:39,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-28 02:13:39,402 INFO L175 Difference]: Start difference. First operand has 242 places, 367 transitions, 4907 flow. Second operand 8 states and 195 transitions. [2024-06-28 02:13:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 420 transitions, 5951 flow [2024-06-28 02:13:40,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 420 transitions, 5722 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-28 02:13:40,652 INFO L231 Difference]: Finished difference. Result has 242 places, 367 transitions, 4775 flow [2024-06-28 02:13:40,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4678, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4775, PETRI_PLACES=242, PETRI_TRANSITIONS=367} [2024-06-28 02:13:40,653 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 190 predicate places. [2024-06-28 02:13:40,653 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 367 transitions, 4775 flow [2024-06-28 02:13:40,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:40,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:40,653 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] [2024-06-28 02:13:40,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:13:40,654 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:40,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:40,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1998158189, now seen corresponding path program 1 times [2024-06-28 02:13:40,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:40,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216273568] [2024-06-28 02:13:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:44,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:44,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216273568] [2024-06-28 02:13:44,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216273568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:44,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:44,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:13:44,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197318382] [2024-06-28 02:13:44,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:44,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:13:44,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:44,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:13:44,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:13:44,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:44,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 367 transitions, 4775 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:44,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:44,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:44,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:47,646 INFO L124 PetriNetUnfolderBase]: 8074/12305 cut-off events. [2024-06-28 02:13:47,693 INFO L125 PetriNetUnfolderBase]: For 496057/496057 co-relation queries the response was YES. [2024-06-28 02:13:47,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77883 conditions, 12305 events. 8074/12305 cut-off events. For 496057/496057 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 76714 event pairs, 1776 based on Foata normal form. 12/12314 useless extension candidates. Maximal degree in co-relation 77767. Up to 10909 conditions per place. [2024-06-28 02:13:47,857 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 383 selfloop transitions, 45 changer transitions 0/435 dead transitions. [2024-06-28 02:13:47,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 435 transitions, 6205 flow [2024-06-28 02:13:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-28 02:13:47,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-06-28 02:13:47,858 INFO L175 Difference]: Start difference. First operand has 242 places, 367 transitions, 4775 flow. Second operand 8 states and 202 transitions. [2024-06-28 02:13:47,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 435 transitions, 6205 flow [2024-06-28 02:13:49,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 435 transitions, 6119 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:13:49,194 INFO L231 Difference]: Finished difference. Result has 243 places, 368 transitions, 4803 flow [2024-06-28 02:13:49,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4803, PETRI_PLACES=243, PETRI_TRANSITIONS=368} [2024-06-28 02:13:49,194 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 191 predicate places. [2024-06-28 02:13:49,195 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 368 transitions, 4803 flow [2024-06-28 02:13:49,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:49,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:49,195 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] [2024-06-28 02:13:49,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:13:49,195 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:49,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1625040259, now seen corresponding path program 4 times [2024-06-28 02:13:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:49,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666149777] [2024-06-28 02:13:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:49,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:51,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:51,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666149777] [2024-06-28 02:13:51,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666149777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:51,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:51,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:51,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47713430] [2024-06-28 02:13:51,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:51,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:51,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:51,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:51,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:51,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:51,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 368 transitions, 4803 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:51,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:51,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:51,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:13:55,423 INFO L124 PetriNetUnfolderBase]: 8120/12393 cut-off events. [2024-06-28 02:13:55,423 INFO L125 PetriNetUnfolderBase]: For 496235/496235 co-relation queries the response was YES. [2024-06-28 02:13:55,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79121 conditions, 12393 events. 8120/12393 cut-off events. For 496235/496235 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 77280 event pairs, 2044 based on Foata normal form. 2/12376 useless extension candidates. Maximal degree in co-relation 79004. Up to 9396 conditions per place. [2024-06-28 02:13:55,586 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 314 selfloop transitions, 125 changer transitions 0/446 dead transitions. [2024-06-28 02:13:55,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 446 transitions, 6898 flow [2024-06-28 02:13:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:13:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:13:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-28 02:13:55,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-06-28 02:13:55,588 INFO L175 Difference]: Start difference. First operand has 243 places, 368 transitions, 4803 flow. Second operand 8 states and 205 transitions. [2024-06-28 02:13:55,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 446 transitions, 6898 flow [2024-06-28 02:13:56,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 446 transitions, 6806 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 02:13:56,991 INFO L231 Difference]: Finished difference. Result has 245 places, 374 transitions, 5111 flow [2024-06-28 02:13:56,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4713, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5111, PETRI_PLACES=245, PETRI_TRANSITIONS=374} [2024-06-28 02:13:56,992 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 193 predicate places. [2024-06-28 02:13:56,992 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 374 transitions, 5111 flow [2024-06-28 02:13:56,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:56,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:13:56,993 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] [2024-06-28 02:13:56,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:13:56,993 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:13:56,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:13:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1304363723, now seen corresponding path program 4 times [2024-06-28 02:13:56,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:13:56,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877075748] [2024-06-28 02:13:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:13:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:13:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:13:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:13:59,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:13:59,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877075748] [2024-06-28 02:13:59,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877075748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:13:59,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:13:59,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:13:59,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889750472] [2024-06-28 02:13:59,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:13:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:13:59,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:13:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:13:59,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:13:59,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:13:59,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 374 transitions, 5111 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:13:59,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:13:59,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:13:59,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:02,968 INFO L124 PetriNetUnfolderBase]: 8166/12385 cut-off events. [2024-06-28 02:14:02,968 INFO L125 PetriNetUnfolderBase]: For 515418/515418 co-relation queries the response was YES. [2024-06-28 02:14:03,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80792 conditions, 12385 events. 8166/12385 cut-off events. For 515418/515418 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 76611 event pairs, 1849 based on Foata normal form. 2/12368 useless extension candidates. Maximal degree in co-relation 80674. Up to 10660 conditions per place. [2024-06-28 02:14:03,124 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 333 selfloop transitions, 102 changer transitions 0/442 dead transitions. [2024-06-28 02:14:03,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 442 transitions, 6810 flow [2024-06-28 02:14:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 02:14:03,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130208333333334 [2024-06-28 02:14:03,132 INFO L175 Difference]: Start difference. First operand has 245 places, 374 transitions, 5111 flow. Second operand 8 states and 197 transitions. [2024-06-28 02:14:03,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 442 transitions, 6810 flow [2024-06-28 02:14:04,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 442 transitions, 6696 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 02:14:04,605 INFO L231 Difference]: Finished difference. Result has 250 places, 378 transitions, 5333 flow [2024-06-28 02:14:04,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5333, PETRI_PLACES=250, PETRI_TRANSITIONS=378} [2024-06-28 02:14:04,606 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 198 predicate places. [2024-06-28 02:14:04,606 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 378 transitions, 5333 flow [2024-06-28 02:14:04,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:04,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:04,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:04,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:14:04,607 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:04,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1943286823, now seen corresponding path program 5 times [2024-06-28 02:14:04,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:04,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319750331] [2024-06-28 02:14:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:04,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:06,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:06,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319750331] [2024-06-28 02:14:06,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319750331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:06,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:06,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:14:06,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143952308] [2024-06-28 02:14:06,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:06,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:14:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:06,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:14:06,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:14:06,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:14:06,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 378 transitions, 5333 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:06,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:06,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:14:06,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:10,205 INFO L124 PetriNetUnfolderBase]: 8212/12485 cut-off events. [2024-06-28 02:14:10,205 INFO L125 PetriNetUnfolderBase]: For 533649/533661 co-relation queries the response was YES. [2024-06-28 02:14:10,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82291 conditions, 12485 events. 8212/12485 cut-off events. For 533649/533661 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 77619 event pairs, 1752 based on Foata normal form. 10/12481 useless extension candidates. Maximal degree in co-relation 82170. Up to 10700 conditions per place. [2024-06-28 02:14:10,394 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 337 selfloop transitions, 99 changer transitions 0/443 dead transitions. [2024-06-28 02:14:10,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 443 transitions, 7172 flow [2024-06-28 02:14:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:14:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:14:10,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-28 02:14:10,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-28 02:14:10,395 INFO L175 Difference]: Start difference. First operand has 250 places, 378 transitions, 5333 flow. Second operand 7 states and 178 transitions. [2024-06-28 02:14:10,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 443 transitions, 7172 flow [2024-06-28 02:14:12,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 443 transitions, 6876 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 02:14:12,120 INFO L231 Difference]: Finished difference. Result has 252 places, 383 transitions, 5412 flow [2024-06-28 02:14:12,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5412, PETRI_PLACES=252, PETRI_TRANSITIONS=383} [2024-06-28 02:14:12,120 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 200 predicate places. [2024-06-28 02:14:12,121 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 383 transitions, 5412 flow [2024-06-28 02:14:12,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:12,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:12,121 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] [2024-06-28 02:14:12,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:14:12,121 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:12,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1696281507, now seen corresponding path program 6 times [2024-06-28 02:14:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:12,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613444485] [2024-06-28 02:14:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:12,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:14,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:14,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613444485] [2024-06-28 02:14:14,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613444485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:14,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:14,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:14:14,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947489672] [2024-06-28 02:14:14,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:14,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:14:14,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:14,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:14:14,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:14:14,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:14:14,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 383 transitions, 5412 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:14,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:14,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:14:14,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:17,707 INFO L124 PetriNetUnfolderBase]: 8258/12545 cut-off events. [2024-06-28 02:14:17,708 INFO L125 PetriNetUnfolderBase]: For 546175/546187 co-relation queries the response was YES. [2024-06-28 02:14:17,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83098 conditions, 12545 events. 8258/12545 cut-off events. For 546175/546187 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 78166 event pairs, 1747 based on Foata normal form. 10/12541 useless extension candidates. Maximal degree in co-relation 82975. Up to 10740 conditions per place. [2024-06-28 02:14:17,877 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 328 selfloop transitions, 105 changer transitions 0/440 dead transitions. [2024-06-28 02:14:17,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 440 transitions, 6986 flow [2024-06-28 02:14:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:14:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:14:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 02:14:17,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148809523809523 [2024-06-28 02:14:17,879 INFO L175 Difference]: Start difference. First operand has 252 places, 383 transitions, 5412 flow. Second operand 7 states and 173 transitions. [2024-06-28 02:14:17,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 440 transitions, 6986 flow [2024-06-28 02:14:19,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 440 transitions, 6872 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 02:14:19,191 INFO L231 Difference]: Finished difference. Result has 257 places, 387 transitions, 5594 flow [2024-06-28 02:14:19,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5306, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5594, PETRI_PLACES=257, PETRI_TRANSITIONS=387} [2024-06-28 02:14:19,192 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 205 predicate places. [2024-06-28 02:14:19,192 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 387 transitions, 5594 flow [2024-06-28 02:14:19,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:19,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:19,193 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] [2024-06-28 02:14:19,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:14:19,193 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:19,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:19,193 INFO L85 PathProgramCache]: Analyzing trace with hash 755518597, now seen corresponding path program 7 times [2024-06-28 02:14:19,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:19,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81120885] [2024-06-28 02:14:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:19,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:21,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:21,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81120885] [2024-06-28 02:14:21,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81120885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:21,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:21,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:21,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887468460] [2024-06-28 02:14:21,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:21,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:21,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:21,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:21,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:21,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:14:21,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 387 transitions, 5594 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:21,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:21,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:14:21,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:25,723 INFO L124 PetriNetUnfolderBase]: 8272/12577 cut-off events. [2024-06-28 02:14:25,723 INFO L125 PetriNetUnfolderBase]: For 557948/557948 co-relation queries the response was YES. [2024-06-28 02:14:25,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83412 conditions, 12577 events. 8272/12577 cut-off events. For 557948/557948 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 78379 event pairs, 1837 based on Foata normal form. 2/12560 useless extension candidates. Maximal degree in co-relation 83287. Up to 10755 conditions per place. [2024-06-28 02:14:25,922 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 337 selfloop transitions, 124 changer transitions 0/468 dead transitions. [2024-06-28 02:14:25,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 468 transitions, 7536 flow [2024-06-28 02:14:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:14:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:14:25,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-28 02:14:25,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2024-06-28 02:14:25,924 INFO L175 Difference]: Start difference. First operand has 257 places, 387 transitions, 5594 flow. Second operand 10 states and 239 transitions. [2024-06-28 02:14:25,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 468 transitions, 7536 flow [2024-06-28 02:14:27,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 468 transitions, 7393 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 02:14:27,687 INFO L231 Difference]: Finished difference. Result has 266 places, 397 transitions, 6017 flow [2024-06-28 02:14:27,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5458, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6017, PETRI_PLACES=266, PETRI_TRANSITIONS=397} [2024-06-28 02:14:27,688 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 214 predicate places. [2024-06-28 02:14:27,688 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 397 transitions, 6017 flow [2024-06-28 02:14:27,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:27,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:27,689 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] [2024-06-28 02:14:27,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:14:27,689 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:27,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2008825219, now seen corresponding path program 5 times [2024-06-28 02:14:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:27,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723575587] [2024-06-28 02:14:27,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:27,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:30,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:30,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723575587] [2024-06-28 02:14:30,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723575587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:30,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489730185] [2024-06-28 02:14:30,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:30,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:30,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:30,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:30,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:30,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:14:30,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 397 transitions, 6017 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:30,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:30,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:14:30,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:34,190 INFO L124 PetriNetUnfolderBase]: 8370/12803 cut-off events. [2024-06-28 02:14:34,190 INFO L125 PetriNetUnfolderBase]: For 595829/595829 co-relation queries the response was YES. [2024-06-28 02:14:34,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85856 conditions, 12803 events. 8370/12803 cut-off events. For 595829/595829 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 80577 event pairs, 2103 based on Foata normal form. 2/12786 useless extension candidates. Maximal degree in co-relation 85728. Up to 9528 conditions per place. [2024-06-28 02:14:34,384 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 321 selfloop transitions, 142 changer transitions 0/470 dead transitions. [2024-06-28 02:14:34,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 470 transitions, 8126 flow [2024-06-28 02:14:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-28 02:14:34,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5286458333333334 [2024-06-28 02:14:34,386 INFO L175 Difference]: Start difference. First operand has 266 places, 397 transitions, 6017 flow. Second operand 8 states and 203 transitions. [2024-06-28 02:14:34,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 470 transitions, 8126 flow [2024-06-28 02:14:36,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 470 transitions, 7872 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-28 02:14:36,548 INFO L231 Difference]: Finished difference. Result has 271 places, 403 transitions, 6177 flow [2024-06-28 02:14:36,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5763, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6177, PETRI_PLACES=271, PETRI_TRANSITIONS=403} [2024-06-28 02:14:36,548 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 219 predicate places. [2024-06-28 02:14:36,548 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 403 transitions, 6177 flow [2024-06-28 02:14:36,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:36,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:36,549 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] [2024-06-28 02:14:36,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:14:36,549 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:36,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:36,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2009270689, now seen corresponding path program 6 times [2024-06-28 02:14:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:36,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495383423] [2024-06-28 02:14:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:36,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:39,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:39,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495383423] [2024-06-28 02:14:39,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495383423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:39,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:39,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354402137] [2024-06-28 02:14:39,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:39,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:39,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:39,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:14:39,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 403 transitions, 6177 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:39,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:39,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:14:39,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:43,243 INFO L124 PetriNetUnfolderBase]: 8364/12808 cut-off events. [2024-06-28 02:14:43,243 INFO L125 PetriNetUnfolderBase]: For 606465/606465 co-relation queries the response was YES. [2024-06-28 02:14:43,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86134 conditions, 12808 events. 8364/12808 cut-off events. For 606465/606465 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 80936 event pairs, 1881 based on Foata normal form. 2/12805 useless extension candidates. Maximal degree in co-relation 86004. Up to 11329 conditions per place. [2024-06-28 02:14:43,442 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 392 selfloop transitions, 56 changer transitions 0/455 dead transitions. [2024-06-28 02:14:43,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 455 transitions, 7489 flow [2024-06-28 02:14:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:14:43,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052083333333334 [2024-06-28 02:14:43,444 INFO L175 Difference]: Start difference. First operand has 271 places, 403 transitions, 6177 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:14:43,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 455 transitions, 7489 flow [2024-06-28 02:14:45,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 455 transitions, 7219 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 02:14:45,737 INFO L231 Difference]: Finished difference. Result has 275 places, 403 transitions, 6025 flow [2024-06-28 02:14:45,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6025, PETRI_PLACES=275, PETRI_TRANSITIONS=403} [2024-06-28 02:14:45,737 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 223 predicate places. [2024-06-28 02:14:45,737 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 403 transitions, 6025 flow [2024-06-28 02:14:45,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:45,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:45,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:14:45,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:14:45,738 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:45,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1039023191, now seen corresponding path program 8 times [2024-06-28 02:14:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:45,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816433106] [2024-06-28 02:14:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:48,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:48,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816433106] [2024-06-28 02:14:48,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816433106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:48,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:48,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763017965] [2024-06-28 02:14:48,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:48,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:48,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:48,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:48,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:14:48,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 403 transitions, 6025 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:48,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:48,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:14:48,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:14:52,082 INFO L124 PetriNetUnfolderBase]: 8358/12725 cut-off events. [2024-06-28 02:14:52,082 INFO L125 PetriNetUnfolderBase]: For 603255/603255 co-relation queries the response was YES. [2024-06-28 02:14:52,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84826 conditions, 12725 events. 8358/12725 cut-off events. For 603255/603255 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 79592 event pairs, 1876 based on Foata normal form. 2/12708 useless extension candidates. Maximal degree in co-relation 84695. Up to 10874 conditions per place. [2024-06-28 02:14:52,270 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 329 selfloop transitions, 123 changer transitions 0/459 dead transitions. [2024-06-28 02:14:52,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 459 transitions, 7450 flow [2024-06-28 02:14:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:14:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:14:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 02:14:52,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-28 02:14:52,272 INFO L175 Difference]: Start difference. First operand has 275 places, 403 transitions, 6025 flow. Second operand 8 states and 195 transitions. [2024-06-28 02:14:52,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 459 transitions, 7450 flow [2024-06-28 02:14:54,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 459 transitions, 7244 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-28 02:14:54,441 INFO L231 Difference]: Finished difference. Result has 275 places, 403 transitions, 6072 flow [2024-06-28 02:14:54,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6072, PETRI_PLACES=275, PETRI_TRANSITIONS=403} [2024-06-28 02:14:54,442 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 223 predicate places. [2024-06-28 02:14:54,442 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 403 transitions, 6072 flow [2024-06-28 02:14:54,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:54,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:14:54,443 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] [2024-06-28 02:14:54,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:14:54,443 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:14:54,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:14:54,443 INFO L85 PathProgramCache]: Analyzing trace with hash -773507147, now seen corresponding path program 7 times [2024-06-28 02:14:54,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:14:54,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739223504] [2024-06-28 02:14:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:14:54,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:14:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:14:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:14:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:14:57,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739223504] [2024-06-28 02:14:57,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739223504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:14:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:14:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:14:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735846075] [2024-06-28 02:14:57,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:14:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:14:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:14:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:14:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:14:57,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:14:57,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 403 transitions, 6072 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:14:57,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:14:57,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:14:57,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:01,330 INFO L124 PetriNetUnfolderBase]: 8730/13286 cut-off events. [2024-06-28 02:15:01,331 INFO L125 PetriNetUnfolderBase]: For 654464/654464 co-relation queries the response was YES. [2024-06-28 02:15:01,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90254 conditions, 13286 events. 8730/13286 cut-off events. For 654464/654464 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 83445 event pairs, 1804 based on Foata normal form. 4/13278 useless extension candidates. Maximal degree in co-relation 90122. Up to 10765 conditions per place. [2024-06-28 02:15:01,524 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 372 selfloop transitions, 118 changer transitions 0/497 dead transitions. [2024-06-28 02:15:01,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 497 transitions, 8516 flow [2024-06-28 02:15:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:15:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:15:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-28 02:15:01,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-28 02:15:01,525 INFO L175 Difference]: Start difference. First operand has 275 places, 403 transitions, 6072 flow. Second operand 10 states and 250 transitions. [2024-06-28 02:15:01,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 497 transitions, 8516 flow [2024-06-28 02:15:04,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 497 transitions, 8266 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 02:15:04,076 INFO L231 Difference]: Finished difference. Result has 280 places, 426 transitions, 6760 flow [2024-06-28 02:15:04,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=5826, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6760, PETRI_PLACES=280, PETRI_TRANSITIONS=426} [2024-06-28 02:15:04,076 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 228 predicate places. [2024-06-28 02:15:04,076 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 426 transitions, 6760 flow [2024-06-28 02:15:04,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:04,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:04,077 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] [2024-06-28 02:15:04,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:15:04,077 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:15:04,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash -588855935, now seen corresponding path program 8 times [2024-06-28 02:15:04,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:04,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083050594] [2024-06-28 02:15:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:04,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:06,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:06,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083050594] [2024-06-28 02:15:06,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083050594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:06,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:06,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:15:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661079882] [2024-06-28 02:15:06,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:06,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:15:06,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:15:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:15:06,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:15:06,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 426 transitions, 6760 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:06,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:06,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:15:06,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:11,018 INFO L124 PetriNetUnfolderBase]: 9082/13792 cut-off events. [2024-06-28 02:15:11,019 INFO L125 PetriNetUnfolderBase]: For 737643/737643 co-relation queries the response was YES. [2024-06-28 02:15:11,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98067 conditions, 13792 events. 9082/13792 cut-off events. For 737643/737643 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 86682 event pairs, 1851 based on Foata normal form. 4/13784 useless extension candidates. Maximal degree in co-relation 97932. Up to 10998 conditions per place. [2024-06-28 02:15:11,249 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 383 selfloop transitions, 134 changer transitions 0/524 dead transitions. [2024-06-28 02:15:11,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 524 transitions, 9266 flow [2024-06-28 02:15:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:15:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:15:11,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-28 02:15:11,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5189393939393939 [2024-06-28 02:15:11,251 INFO L175 Difference]: Start difference. First operand has 280 places, 426 transitions, 6760 flow. Second operand 11 states and 274 transitions. [2024-06-28 02:15:11,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 524 transitions, 9266 flow [2024-06-28 02:15:14,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 524 transitions, 8718 flow, removed 200 selfloop flow, removed 6 redundant places. [2024-06-28 02:15:14,281 INFO L231 Difference]: Finished difference. Result has 285 places, 442 transitions, 6946 flow [2024-06-28 02:15:14,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6946, PETRI_PLACES=285, PETRI_TRANSITIONS=442} [2024-06-28 02:15:14,282 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 233 predicate places. [2024-06-28 02:15:14,282 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 442 transitions, 6946 flow [2024-06-28 02:15:14,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:14,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:14,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:15:14,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:15:14,283 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:15:14,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:14,283 INFO L85 PathProgramCache]: Analyzing trace with hash 433537119, now seen corresponding path program 9 times [2024-06-28 02:15:14,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:14,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561295282] [2024-06-28 02:15:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:14,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561295282] [2024-06-28 02:15:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561295282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:16,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:16,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:15:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560913001] [2024-06-28 02:15:16,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:16,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:15:16,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:15:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:15:16,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:15:16,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 442 transitions, 6946 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:16,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:16,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:15:16,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:20,723 INFO L124 PetriNetUnfolderBase]: 9174/13998 cut-off events. [2024-06-28 02:15:20,723 INFO L125 PetriNetUnfolderBase]: For 725369/725369 co-relation queries the response was YES. [2024-06-28 02:15:20,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97019 conditions, 13998 events. 9174/13998 cut-off events. For 725369/725369 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 89056 event pairs, 1998 based on Foata normal form. 2/13997 useless extension candidates. Maximal degree in co-relation 96883. Up to 12779 conditions per place. [2024-06-28 02:15:20,916 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 459 selfloop transitions, 36 changer transitions 0/502 dead transitions. [2024-06-28 02:15:20,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 502 transitions, 8331 flow [2024-06-28 02:15:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:15:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:15:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-28 02:15:20,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-28 02:15:20,918 INFO L175 Difference]: Start difference. First operand has 285 places, 442 transitions, 6946 flow. Second operand 9 states and 210 transitions. [2024-06-28 02:15:20,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 502 transitions, 8331 flow [2024-06-28 02:15:23,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 502 transitions, 7980 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-28 02:15:23,689 INFO L231 Difference]: Finished difference. Result has 287 places, 450 transitions, 6861 flow [2024-06-28 02:15:23,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6603, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6861, PETRI_PLACES=287, PETRI_TRANSITIONS=450} [2024-06-28 02:15:23,690 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 235 predicate places. [2024-06-28 02:15:23,690 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 450 transitions, 6861 flow [2024-06-28 02:15:23,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:23,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:23,690 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] [2024-06-28 02:15:23,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:15:23,691 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:15:23,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:23,691 INFO L85 PathProgramCache]: Analyzing trace with hash 655204479, now seen corresponding path program 10 times [2024-06-28 02:15:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:23,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543353352] [2024-06-28 02:15:23,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:23,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:26,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:26,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543353352] [2024-06-28 02:15:26,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543353352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:26,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:26,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:15:26,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441566601] [2024-06-28 02:15:26,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:26,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:15:26,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:15:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:15:26,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:15:26,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 450 transitions, 6861 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:26,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:26,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:15:26,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:30,553 INFO L124 PetriNetUnfolderBase]: 9208/14038 cut-off events. [2024-06-28 02:15:30,554 INFO L125 PetriNetUnfolderBase]: For 729761/729761 co-relation queries the response was YES. [2024-06-28 02:15:30,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95602 conditions, 14038 events. 9208/14038 cut-off events. For 729761/729761 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 89265 event pairs, 2010 based on Foata normal form. 2/14037 useless extension candidates. Maximal degree in co-relation 95465. Up to 12570 conditions per place. [2024-06-28 02:15:30,766 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 468 selfloop transitions, 48 changer transitions 0/523 dead transitions. [2024-06-28 02:15:30,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 523 transitions, 8667 flow [2024-06-28 02:15:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:15:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:15:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-28 02:15:30,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-28 02:15:30,768 INFO L175 Difference]: Start difference. First operand has 287 places, 450 transitions, 6861 flow. Second operand 10 states and 234 transitions. [2024-06-28 02:15:30,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 523 transitions, 8667 flow [2024-06-28 02:15:33,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 523 transitions, 8456 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-28 02:15:33,710 INFO L231 Difference]: Finished difference. Result has 292 places, 462 transitions, 7156 flow [2024-06-28 02:15:33,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6668, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7156, PETRI_PLACES=292, PETRI_TRANSITIONS=462} [2024-06-28 02:15:33,710 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 240 predicate places. [2024-06-28 02:15:33,710 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 462 transitions, 7156 flow [2024-06-28 02:15:33,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:33,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:33,711 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] [2024-06-28 02:15:33,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:15:33,711 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:15:33,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:33,712 INFO L85 PathProgramCache]: Analyzing trace with hash 226870473, now seen corresponding path program 9 times [2024-06-28 02:15:33,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:33,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296864319] [2024-06-28 02:15:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:33,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:35,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:35,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296864319] [2024-06-28 02:15:35,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296864319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:35,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:35,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:15:35,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429385607] [2024-06-28 02:15:35,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:35,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:15:35,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:15:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:15:35,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:15:35,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 462 transitions, 7156 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:35,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:35,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:15:35,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:39,731 INFO L124 PetriNetUnfolderBase]: 9196/13942 cut-off events. [2024-06-28 02:15:39,731 INFO L125 PetriNetUnfolderBase]: For 735058/735058 co-relation queries the response was YES. [2024-06-28 02:15:39,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95386 conditions, 13942 events. 9196/13942 cut-off events. For 735058/735058 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 88380 event pairs, 2109 based on Foata normal form. 4/13934 useless extension candidates. Maximal degree in co-relation 95247. Up to 12656 conditions per place. [2024-06-28 02:15:39,978 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 439 selfloop transitions, 70 changer transitions 0/516 dead transitions. [2024-06-28 02:15:39,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 516 transitions, 8566 flow [2024-06-28 02:15:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:15:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:15:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-28 02:15:39,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 02:15:39,979 INFO L175 Difference]: Start difference. First operand has 292 places, 462 transitions, 7156 flow. Second operand 9 states and 216 transitions. [2024-06-28 02:15:39,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 516 transitions, 8566 flow [2024-06-28 02:15:42,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 516 transitions, 8370 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-28 02:15:42,563 INFO L231 Difference]: Finished difference. Result has 295 places, 463 transitions, 7160 flow [2024-06-28 02:15:42,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6960, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7160, PETRI_PLACES=295, PETRI_TRANSITIONS=463} [2024-06-28 02:15:42,564 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 243 predicate places. [2024-06-28 02:15:42,564 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 463 transitions, 7160 flow [2024-06-28 02:15:42,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:42,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:42,564 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] [2024-06-28 02:15:42,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:15:42,564 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:15:42,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash 661870719, now seen corresponding path program 11 times [2024-06-28 02:15:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:42,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292546505] [2024-06-28 02:15:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:45,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:45,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292546505] [2024-06-28 02:15:45,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292546505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:45,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:45,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:15:45,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346228060] [2024-06-28 02:15:45,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:45,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:15:45,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:15:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:15:45,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:15:45,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 463 transitions, 7160 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:45,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:45,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:15:45,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:49,718 INFO L124 PetriNetUnfolderBase]: 9190/13998 cut-off events. [2024-06-28 02:15:49,718 INFO L125 PetriNetUnfolderBase]: For 739140/739140 co-relation queries the response was YES. [2024-06-28 02:15:49,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95211 conditions, 13998 events. 9190/13998 cut-off events. For 739140/739140 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 88783 event pairs, 2028 based on Foata normal form. 2/13997 useless extension candidates. Maximal degree in co-relation 95071. Up to 12551 conditions per place. [2024-06-28 02:15:49,906 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 481 selfloop transitions, 51 changer transitions 0/539 dead transitions. [2024-06-28 02:15:49,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 539 transitions, 8731 flow [2024-06-28 02:15:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:15:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:15:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-28 02:15:49,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2024-06-28 02:15:49,907 INFO L175 Difference]: Start difference. First operand has 295 places, 463 transitions, 7160 flow. Second operand 12 states and 278 transitions. [2024-06-28 02:15:49,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 539 transitions, 8731 flow [2024-06-28 02:15:52,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 539 transitions, 8554 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 02:15:53,005 INFO L231 Difference]: Finished difference. Result has 301 places, 465 transitions, 7185 flow [2024-06-28 02:15:53,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7185, PETRI_PLACES=301, PETRI_TRANSITIONS=465} [2024-06-28 02:15:53,005 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 249 predicate places. [2024-06-28 02:15:53,006 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 465 transitions, 7185 flow [2024-06-28 02:15:53,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:53,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:15:53,006 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] [2024-06-28 02:15:53,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 02:15:53,006 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:15:53,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:15:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash 433790823, now seen corresponding path program 10 times [2024-06-28 02:15:53,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:15:53,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282082164] [2024-06-28 02:15:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:15:53,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:15:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:15:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:15:55,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:15:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282082164] [2024-06-28 02:15:55,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282082164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:15:55,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:15:55,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:15:55,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133704062] [2024-06-28 02:15:55,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:15:55,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:15:55,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:15:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:15:55,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:15:55,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:15:55,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 465 transitions, 7185 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:15:55,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:15:55,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:15:55,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:15:59,130 INFO L124 PetriNetUnfolderBase]: 9184/13920 cut-off events. [2024-06-28 02:15:59,130 INFO L125 PetriNetUnfolderBase]: For 740741/740741 co-relation queries the response was YES. [2024-06-28 02:15:59,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94970 conditions, 13920 events. 9184/13920 cut-off events. For 740741/740741 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 88352 event pairs, 2085 based on Foata normal form. 2/13910 useless extension candidates. Maximal degree in co-relation 94829. Up to 12643 conditions per place. [2024-06-28 02:15:59,307 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 430 selfloop transitions, 71 changer transitions 0/508 dead transitions. [2024-06-28 02:15:59,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 508 transitions, 8322 flow [2024-06-28 02:15:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:15:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:15:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-28 02:15:59,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-06-28 02:15:59,309 INFO L175 Difference]: Start difference. First operand has 301 places, 465 transitions, 7185 flow. Second operand 8 states and 190 transitions. [2024-06-28 02:15:59,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 508 transitions, 8322 flow [2024-06-28 02:16:02,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 508 transitions, 8058 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-28 02:16:02,354 INFO L231 Difference]: Finished difference. Result has 301 places, 465 transitions, 7070 flow [2024-06-28 02:16:02,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7070, PETRI_PLACES=301, PETRI_TRANSITIONS=465} [2024-06-28 02:16:02,355 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 249 predicate places. [2024-06-28 02:16:02,355 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 465 transitions, 7070 flow [2024-06-28 02:16:02,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:02,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:16:02,355 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] [2024-06-28 02:16:02,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 02:16:02,356 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:16:02,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:16:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash 433524099, now seen corresponding path program 12 times [2024-06-28 02:16:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:16:02,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030177474] [2024-06-28 02:16:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:16:02,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:16:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:16:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:16:05,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:16:05,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030177474] [2024-06-28 02:16:05,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030177474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:16:05,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:16:05,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:16:05,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860162987] [2024-06-28 02:16:05,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:16:05,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:16:05,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:16:05,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:16:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:16:05,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:16:05,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 465 transitions, 7070 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:05,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:16:05,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:16:05,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:16:08,816 INFO L124 PetriNetUnfolderBase]: 9178/13919 cut-off events. [2024-06-28 02:16:08,816 INFO L125 PetriNetUnfolderBase]: For 741117/741117 co-relation queries the response was YES. [2024-06-28 02:16:08,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94490 conditions, 13919 events. 9178/13919 cut-off events. For 741117/741117 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 87452 event pairs, 1892 based on Foata normal form. 2/13909 useless extension candidates. Maximal degree in co-relation 94348. Up to 11040 conditions per place. [2024-06-28 02:16:08,988 INFO L140 encePairwiseOnDemand]: 35/48 looper letters, 356 selfloop transitions, 161 changer transitions 0/524 dead transitions. [2024-06-28 02:16:08,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 524 transitions, 8759 flow [2024-06-28 02:16:08,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:16:08,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:16:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-28 02:16:09,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-28 02:16:09,252 INFO L175 Difference]: Start difference. First operand has 301 places, 465 transitions, 7070 flow. Second operand 9 states and 221 transitions. [2024-06-28 02:16:09,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 524 transitions, 8759 flow [2024-06-28 02:16:12,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 524 transitions, 8504 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-28 02:16:12,421 INFO L231 Difference]: Finished difference. Result has 302 places, 467 transitions, 7235 flow [2024-06-28 02:16:12,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6833, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7235, PETRI_PLACES=302, PETRI_TRANSITIONS=467} [2024-06-28 02:16:12,421 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 250 predicate places. [2024-06-28 02:16:12,422 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 467 transitions, 7235 flow [2024-06-28 02:16:12,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:12,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:16:12,422 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] [2024-06-28 02:16:12,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 02:16:12,422 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:16:12,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:16:12,422 INFO L85 PathProgramCache]: Analyzing trace with hash 227116737, now seen corresponding path program 2 times [2024-06-28 02:16:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:16:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778421459] [2024-06-28 02:16:12,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:16:12,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:16:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:16:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:16:16,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:16:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778421459] [2024-06-28 02:16:16,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778421459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:16:16,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:16:16,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:16:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730563558] [2024-06-28 02:16:16,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:16:16,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:16:16,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:16:16,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:16:16,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:16:16,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:16:16,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 467 transitions, 7235 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:16,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:16:16,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:16:16,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:16:20,789 INFO L124 PetriNetUnfolderBase]: 9390/14365 cut-off events. [2024-06-28 02:16:20,790 INFO L125 PetriNetUnfolderBase]: For 795344/795344 co-relation queries the response was YES. [2024-06-28 02:16:20,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97799 conditions, 14365 events. 9390/14365 cut-off events. For 795344/795344 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 92261 event pairs, 1969 based on Foata normal form. 12/14365 useless extension candidates. Maximal degree in co-relation 97656. Up to 12701 conditions per place. [2024-06-28 02:16:20,978 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 473 selfloop transitions, 47 changer transitions 0/527 dead transitions. [2024-06-28 02:16:20,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 527 transitions, 8902 flow [2024-06-28 02:16:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:16:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:16:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-28 02:16:20,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-06-28 02:16:20,979 INFO L175 Difference]: Start difference. First operand has 302 places, 467 transitions, 7235 flow. Second operand 8 states and 195 transitions. [2024-06-28 02:16:20,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 527 transitions, 8902 flow [2024-06-28 02:16:24,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 527 transitions, 8584 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 02:16:24,127 INFO L231 Difference]: Finished difference. Result has 304 places, 468 transitions, 7037 flow [2024-06-28 02:16:24,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6917, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7037, PETRI_PLACES=304, PETRI_TRANSITIONS=468} [2024-06-28 02:16:24,127 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 252 predicate places. [2024-06-28 02:16:24,127 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 468 transitions, 7037 flow [2024-06-28 02:16:24,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:24,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:16:24,128 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] [2024-06-28 02:16:24,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 02:16:24,128 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:16:24,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:16:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash 240061407, now seen corresponding path program 3 times [2024-06-28 02:16:24,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:16:24,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305046294] [2024-06-28 02:16:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:16:24,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:16:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:16:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:16:27,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:16:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305046294] [2024-06-28 02:16:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305046294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:16:27,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:16:27,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:16:27,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874128672] [2024-06-28 02:16:27,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:16:27,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:16:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:16:27,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:16:27,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:16:27,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:16:27,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 468 transitions, 7037 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:27,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:16:27,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:16:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:16:32,110 INFO L124 PetriNetUnfolderBase]: 9602/14725 cut-off events. [2024-06-28 02:16:32,110 INFO L125 PetriNetUnfolderBase]: For 820133/820133 co-relation queries the response was YES. [2024-06-28 02:16:32,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99278 conditions, 14725 events. 9602/14725 cut-off events. For 820133/820133 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 95243 event pairs, 2148 based on Foata normal form. 12/14734 useless extension candidates. Maximal degree in co-relation 99134. Up to 13319 conditions per place. [2024-06-28 02:16:32,294 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 491 selfloop transitions, 22 changer transitions 0/520 dead transitions. [2024-06-28 02:16:32,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 520 transitions, 8504 flow [2024-06-28 02:16:32,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:16:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:16:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-28 02:16:32,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869791666666667 [2024-06-28 02:16:32,296 INFO L175 Difference]: Start difference. First operand has 304 places, 468 transitions, 7037 flow. Second operand 8 states and 187 transitions. [2024-06-28 02:16:32,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 520 transitions, 8504 flow [2024-06-28 02:16:35,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 520 transitions, 8398 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 02:16:35,472 INFO L231 Difference]: Finished difference. Result has 306 places, 469 transitions, 7004 flow [2024-06-28 02:16:35,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7004, PETRI_PLACES=306, PETRI_TRANSITIONS=469} [2024-06-28 02:16:35,472 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 254 predicate places. [2024-06-28 02:16:35,472 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 469 transitions, 7004 flow [2024-06-28 02:16:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:35,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:16:35,473 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] [2024-06-28 02:16:35,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 02:16:35,473 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:16:35,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:16:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash 670450527, now seen corresponding path program 4 times [2024-06-28 02:16:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:16:35,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918657939] [2024-06-28 02:16:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:16:35,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:16:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:16:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:16:38,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:16:38,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918657939] [2024-06-28 02:16:38,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918657939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:16:38,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:16:38,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 02:16:38,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80906788] [2024-06-28 02:16:38,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:16:38,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 02:16:38,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:16:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 02:16:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 02:16:38,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-06-28 02:16:38,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 469 transitions, 7004 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:38,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:16:38,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-06-28 02:16:38,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:16:43,223 INFO L124 PetriNetUnfolderBase]: 9652/14795 cut-off events. [2024-06-28 02:16:43,224 INFO L125 PetriNetUnfolderBase]: For 810773/810773 co-relation queries the response was YES. [2024-06-28 02:16:43,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99384 conditions, 14795 events. 9652/14795 cut-off events. For 810773/810773 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 95651 event pairs, 2123 based on Foata normal form. 8/14800 useless extension candidates. Maximal degree in co-relation 99239. Up to 13215 conditions per place. [2024-06-28 02:16:43,409 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 500 selfloop transitions, 25 changer transitions 0/532 dead transitions. [2024-06-28 02:16:43,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 532 transitions, 8621 flow [2024-06-28 02:16:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:16:43,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:16:43,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-28 02:16:43,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-28 02:16:43,411 INFO L175 Difference]: Start difference. First operand has 306 places, 469 transitions, 7004 flow. Second operand 9 states and 211 transitions. [2024-06-28 02:16:43,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 532 transitions, 8621 flow [2024-06-28 02:16:46,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 532 transitions, 8574 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 02:16:46,530 INFO L231 Difference]: Finished difference. Result has 309 places, 470 transitions, 7035 flow [2024-06-28 02:16:46,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6957, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7035, PETRI_PLACES=309, PETRI_TRANSITIONS=470} [2024-06-28 02:16:46,530 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 257 predicate places. [2024-06-28 02:16:46,531 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 470 transitions, 7035 flow [2024-06-28 02:16:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:16:46,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:16:46,531 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] [2024-06-28 02:16:46,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 02:16:46,531 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-28 02:16:46,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:16:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1890953733, now seen corresponding path program 1 times [2024-06-28 02:16:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:16:46,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303181806] [2024-06-28 02:16:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:16:46,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:16:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat