./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:41:33,669 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:41:33,738 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:41:33,743 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:41:33,744 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:41:33,768 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:41:33,772 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:41:33,772 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:41:33,773 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:41:33,775 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:41:33,775 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:41:33,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:41:33,776 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:41:33,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:41:33,780 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:41:33,780 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:41:33,780 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:41:33,781 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:41:33,781 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:41:33,781 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:41:33,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:41:33,782 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:41:33,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:41:33,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:41:33,792 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:41:33,792 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:41:33,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:41:33,792 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:41:33,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:41:33,793 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:41:33,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:41:33,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:41:33,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:41:33,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:41:33,795 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:41:33,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:41:33,796 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:41:33,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:41:33,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:41:33,796 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:41:33,797 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:41:33,797 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:41:33,797 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:41:33,797 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:41:34,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:41:34,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:41:34,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:41:34,099 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:41:34,100 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:41:34,101 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i [2024-06-21 21:41:35,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:41:35,493 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:41:35,494 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i [2024-06-21 21:41:35,512 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6cd38ab0/2f44e3c6162b4814a627731da345cd8d/FLAGf25c913c4 [2024-06-21 21:41:35,524 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6cd38ab0/2f44e3c6162b4814a627731da345cd8d [2024-06-21 21:41:35,526 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:41:35,526 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:41:35,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe012_power.oepc.yml/witness.yml [2024-06-21 21:41:35,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:41:35,741 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:41:35,745 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:41:35,745 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:41:35,750 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:41:35,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:41:35" (1/2) ... [2024-06-21 21:41:35,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@147969b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:41:35, skipping insertion in model container [2024-06-21 21:41:35,752 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:41:35" (1/2) ... [2024-06-21 21:41:35,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19338cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:41:35, skipping insertion in model container [2024-06-21 21:41:35,753 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:41:35" (2/2) ... [2024-06-21 21:41:35,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@147969b6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:35, skipping insertion in model container [2024-06-21 21:41:35,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:41:35" (2/2) ... [2024-06-21 21:41:35,755 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:41:35,920 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:41:35,921 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && z$w_buff0 == 0) && z$w_buff0_used == (_Bool)0) && z$w_buff1 == 0) && z$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0) [2024-06-21 21:41:35,921 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && z$w_buff0 == 0) && z$w_buff0_used == (_Bool)0) && z$w_buff1 == 0) && z$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0) [2024-06-21 21:41:35,921 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && z$w_buff0 == 0) && z$w_buff0_used == (_Bool)0) && z$w_buff1 == 0) && z$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & z && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0) [2024-06-21 21:41:35,922 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:41:35,922 INFO L106 edCorrectnessWitness]: ghost_update [L838-L838] multithreaded = 1; [2024-06-21 21:41:35,967 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:41:36,288 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:41:36,298 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:41:36,520 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:41:36,557 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:41:36,558 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36 WrapperNode [2024-06-21 21:41:36,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:41:36,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:41:36,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:41:36,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:41:36,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,582 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,621 INFO L138 Inliner]: procedures = 175, calls = 82, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 209 [2024-06-21 21:41:36,621 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:41:36,622 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:41:36,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:41:36,622 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:41:36,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,638 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,657 INFO L175 MemorySlicer]: Split 41 memory accesses to 2 slices as follows [2, 39]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-21 21:41:36,664 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,703 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:41:36,704 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:41:36,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:41:36,704 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:41:36,705 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (1/1) ... [2024-06-21 21:41:36,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:41:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:41:36,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:41:36,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:41:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:41:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:41:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:41:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:41:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:41:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:41:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:41:36,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:41:36,781 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:41:36,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:41:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:41:36,782 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:41:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:41:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:41:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:41:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:41:36,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:41:36,786 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:41:36,963 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:41:36,965 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:41:37,506 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:41:37,506 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:41:38,060 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:41:38,060 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:41:38,061 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:41:38 BoogieIcfgContainer [2024-06-21 21:41:38,061 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:41:38,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:41:38,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:41:38,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:41:38,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:41:35" (1/4) ... [2024-06-21 21:41:38,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14aae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:41:38, skipping insertion in model container [2024-06-21 21:41:38,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:41:35" (2/4) ... [2024-06-21 21:41:38,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14aae5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:41:38, skipping insertion in model container [2024-06-21 21:41:38,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:41:36" (3/4) ... [2024-06-21 21:41:38,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14aae5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:41:38, skipping insertion in model container [2024-06-21 21:41:38,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:41:38" (4/4) ... [2024-06-21 21:41:38,069 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_power.oepc.i [2024-06-21 21:41:38,085 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:41:38,085 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:41:38,085 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:41:38,151 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:41:38,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:41:38,229 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:41:38,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:41:38,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:41:38,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:41:38,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:41:38,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:41:38,255 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;@23fe32fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:41:38,255 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:41:38,262 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:41:38,262 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:41:38,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:41:38,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:38,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:41:38,264 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:38,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash 726128486, now seen corresponding path program 1 times [2024-06-21 21:41:38,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:38,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155393526] [2024-06-21 21:41:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:38,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:40,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:40,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155393526] [2024-06-21 21:41:40,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155393526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:40,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:40,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:41:40,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099285658] [2024-06-21 21:41:40,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:41:40,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:41:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:41:40,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:41:40,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:40,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:40,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:41:40,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:41,297 INFO L124 PetriNetUnfolderBase]: 770/1239 cut-off events. [2024-06-21 21:41:41,297 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-21 21:41:41,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2482 conditions, 1239 events. 770/1239 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5971 event pairs, 479 based on Foata normal form. 1/1208 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-21 21:41:41,313 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 21:41:41,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 179 flow [2024-06-21 21:41:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:41:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:41:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-06-21 21:41:41,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 21:41:41,328 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 73 transitions. [2024-06-21 21:41:41,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 179 flow [2024-06-21 21:41:41,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:41:41,333 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:41:41,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:41:41,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:41:41,338 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:41:41,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:41,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:41,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:41:41,339 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:41,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2025436635, now seen corresponding path program 1 times [2024-06-21 21:41:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:41,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854609053] [2024-06-21 21:41:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:44,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:44,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854609053] [2024-06-21 21:41:44,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854609053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:44,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:44,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:41:44,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894074016] [2024-06-21 21:41:44,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:44,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:41:44,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:44,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:41:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:41:44,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:41:44,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:44,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:44,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:41:44,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:44,779 INFO L124 PetriNetUnfolderBase]: 764/1231 cut-off events. [2024-06-21 21:41:44,780 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-21 21:41:44,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2837 conditions, 1231 events. 764/1231 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5890 event pairs, 369 based on Foata normal form. 6/1233 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-21 21:41:44,789 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 21:41:44,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 254 flow [2024-06-21 21:41:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:41:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:41:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 21:41:44,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-21 21:41:44,793 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-21 21:41:44,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 254 flow [2024-06-21 21:41:44,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:41:44,797 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:41:44,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:41:44,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:41:44,800 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:41:44,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:44,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:44,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:44,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:41:44,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:44,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:44,805 INFO L85 PathProgramCache]: Analyzing trace with hash -210883335, now seen corresponding path program 1 times [2024-06-21 21:41:44,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:44,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763794595] [2024-06-21 21:41:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:44,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763794595] [2024-06-21 21:41:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763794595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:48,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:48,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:41:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211914841] [2024-06-21 21:41:48,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:41:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:41:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:41:48,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:41:48,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:48,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:48,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:41:48,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:48,999 INFO L124 PetriNetUnfolderBase]: 969/1526 cut-off events. [2024-06-21 21:41:48,999 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-21 21:41:49,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3915 conditions, 1526 events. 969/1526 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7143 event pairs, 305 based on Foata normal form. 12/1531 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-21 21:41:49,009 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 21:41:49,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 378 flow [2024-06-21 21:41:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:41:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:41:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 21:41:49,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-21 21:41:49,015 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 132 transitions. [2024-06-21 21:41:49,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 378 flow [2024-06-21 21:41:49,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 358 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:41:49,019 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 21:41:49,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 21:41:49,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 21:41:49,021 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 21:41:49,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:49,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:49,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:49,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:41:49,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:49,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash 89852639, now seen corresponding path program 1 times [2024-06-21 21:41:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:49,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709264931] [2024-06-21 21:41:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:50,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:50,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709264931] [2024-06-21 21:41:50,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709264931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:50,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:50,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:41:50,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980806948] [2024-06-21 21:41:50,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:50,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:41:50,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:50,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:41:50,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:41:50,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:41:50,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:50,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:50,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:41:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:51,932 INFO L124 PetriNetUnfolderBase]: 964/1518 cut-off events. [2024-06-21 21:41:51,932 INFO L125 PetriNetUnfolderBase]: For 1574/1586 co-relation queries the response was YES. [2024-06-21 21:41:51,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4298 conditions, 1518 events. 964/1518 cut-off events. For 1574/1586 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7086 event pairs, 382 based on Foata normal form. 8/1524 useless extension candidates. Maximal degree in co-relation 4281. Up to 1452 conditions per place. [2024-06-21 21:41:51,943 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-21 21:41:51,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 337 flow [2024-06-21 21:41:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:41:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:41:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 21:41:51,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 21:41:51,945 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 93 transitions. [2024-06-21 21:41:51,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 337 flow [2024-06-21 21:41:51,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 310 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:41:51,953 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 21:41:51,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 21:41:51,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 21:41:51,954 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 21:41:51,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:51,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:51,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:51,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:41:51,956 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:51,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1494340704, now seen corresponding path program 1 times [2024-06-21 21:41:51,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:51,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466990069] [2024-06-21 21:41:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:51,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:54,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:54,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466990069] [2024-06-21 21:41:54,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466990069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:54,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:54,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:41:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300762089] [2024-06-21 21:41:54,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:54,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:41:54,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:54,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:41:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:41:54,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:41:54,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:54,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:54,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:41:54,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:55,155 INFO L124 PetriNetUnfolderBase]: 1112/1732 cut-off events. [2024-06-21 21:41:55,155 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-21 21:41:55,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5220 conditions, 1732 events. 1112/1732 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8166 event pairs, 451 based on Foata normal form. 2/1733 useless extension candidates. Maximal degree in co-relation 5201. Up to 1656 conditions per place. [2024-06-21 21:41:55,169 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-21 21:41:55,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 424 flow [2024-06-21 21:41:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:41:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:41:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:41:55,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:41:55,174 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:41:55,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 424 flow [2024-06-21 21:41:55,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 397 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 21:41:55,180 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-21 21:41:55,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-21 21:41:55,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 21:41:55,182 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-21 21:41:55,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:55,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:55,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:55,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:41:55,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:55,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:55,184 INFO L85 PathProgramCache]: Analyzing trace with hash 929695540, now seen corresponding path program 1 times [2024-06-21 21:41:55,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:55,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760665583] [2024-06-21 21:41:55,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:55,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:58,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:58,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760665583] [2024-06-21 21:41:58,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760665583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:58,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:58,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:41:58,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235863683] [2024-06-21 21:41:58,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:58,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:41:58,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:58,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:41:58,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:41:58,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:41:58,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:58,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:58,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:41:58,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:59,174 INFO L124 PetriNetUnfolderBase]: 1067/1677 cut-off events. [2024-06-21 21:41:59,175 INFO L125 PetriNetUnfolderBase]: For 3654/3686 co-relation queries the response was YES. [2024-06-21 21:41:59,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5604 conditions, 1677 events. 1067/1677 cut-off events. For 3654/3686 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7949 event pairs, 390 based on Foata normal form. 14/1680 useless extension candidates. Maximal degree in co-relation 5582. Up to 1549 conditions per place. [2024-06-21 21:41:59,188 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-21 21:41:59,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 535 flow [2024-06-21 21:41:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:41:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:41:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 21:41:59,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-21 21:41:59,190 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 118 transitions. [2024-06-21 21:41:59,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 535 flow [2024-06-21 21:41:59,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 86 transitions, 529 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 21:41:59,196 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-21 21:41:59,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-21 21:41:59,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 21:41:59,199 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-21 21:41:59,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:59,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:59,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:59,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:41:59,200 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:59,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:59,201 INFO L85 PathProgramCache]: Analyzing trace with hash 509168366, now seen corresponding path program 2 times [2024-06-21 21:41:59,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433022484] [2024-06-21 21:41:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:02,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:02,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433022484] [2024-06-21 21:42:02,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433022484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:02,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:02,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:42:02,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400166947] [2024-06-21 21:42:02,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:02,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:42:02,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:02,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:42:02,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:42:02,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:42:02,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:02,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:02,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:42:02,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:03,195 INFO L124 PetriNetUnfolderBase]: 1082/1704 cut-off events. [2024-06-21 21:42:03,195 INFO L125 PetriNetUnfolderBase]: For 5157/5202 co-relation queries the response was YES. [2024-06-21 21:42:03,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 1704 events. 1082/1704 cut-off events. For 5157/5202 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8152 event pairs, 390 based on Foata normal form. 16/1710 useless extension candidates. Maximal degree in co-relation 6197. Up to 1574 conditions per place. [2024-06-21 21:42:03,208 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-21 21:42:03,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 535 flow [2024-06-21 21:42:03,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:42:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:42:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 21:42:03,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:42:03,211 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 112 transitions. [2024-06-21 21:42:03,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 535 flow [2024-06-21 21:42:03,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 502 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 21:42:03,218 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-21 21:42:03,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 21:42:03,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 21:42:03,219 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-21 21:42:03,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:03,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:03,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:03,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:42:03,220 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:03,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2019677381, now seen corresponding path program 1 times [2024-06-21 21:42:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:03,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852083374] [2024-06-21 21:42:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:03,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:06,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:06,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852083374] [2024-06-21 21:42:06,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852083374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:06,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:06,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:06,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17022475] [2024-06-21 21:42:06,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:06,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:06,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:06,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:42:06,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:06,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:06,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:42:06,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:07,224 INFO L124 PetriNetUnfolderBase]: 1118/1769 cut-off events. [2024-06-21 21:42:07,224 INFO L125 PetriNetUnfolderBase]: For 5970/6010 co-relation queries the response was YES. [2024-06-21 21:42:07,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6520 conditions, 1769 events. 1118/1769 cut-off events. For 5970/6010 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8461 event pairs, 385 based on Foata normal form. 16/1775 useless extension candidates. Maximal degree in co-relation 6493. Up to 1608 conditions per place. [2024-06-21 21:42:07,237 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-21 21:42:07,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 733 flow [2024-06-21 21:42:07,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 21:42:07,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:42:07,242 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 154 transitions. [2024-06-21 21:42:07,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 733 flow [2024-06-21 21:42:07,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 669 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:07,251 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 468 flow [2024-06-21 21:42:07,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=468, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-21 21:42:07,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 21:42:07,252 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 468 flow [2024-06-21 21:42:07,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:07,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:07,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:07,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:42:07,253 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:07,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:07,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1887493101, now seen corresponding path program 2 times [2024-06-21 21:42:07,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:07,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187051122] [2024-06-21 21:42:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:07,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:10,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:10,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187051122] [2024-06-21 21:42:10,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187051122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:10,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:10,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:10,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980630835] [2024-06-21 21:42:10,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:10,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:10,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:42:10,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 468 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:10,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:10,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:42:10,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:11,570 INFO L124 PetriNetUnfolderBase]: 1131/1794 cut-off events. [2024-06-21 21:42:11,570 INFO L125 PetriNetUnfolderBase]: For 7709/7762 co-relation queries the response was YES. [2024-06-21 21:42:11,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7122 conditions, 1794 events. 1131/1794 cut-off events. For 7709/7762 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8639 event pairs, 370 based on Foata normal form. 28/1812 useless extension candidates. Maximal degree in co-relation 7093. Up to 1610 conditions per place. [2024-06-21 21:42:11,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 28 changer transitions 0/110 dead transitions. [2024-06-21 21:42:11,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 110 transitions, 794 flow [2024-06-21 21:42:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 21:42:11,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 21:42:11,596 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 468 flow. Second operand 7 states and 135 transitions. [2024-06-21 21:42:11,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 110 transitions, 794 flow [2024-06-21 21:42:11,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 751 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:11,610 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 528 flow [2024-06-21 21:42:11,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-21 21:42:11,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-21 21:42:11,612 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 528 flow [2024-06-21 21:42:11,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:11,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:11,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:11,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:42:11,613 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:11,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash 859329669, now seen corresponding path program 3 times [2024-06-21 21:42:11,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:11,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816931598] [2024-06-21 21:42:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:11,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:14,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:14,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816931598] [2024-06-21 21:42:14,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816931598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:14,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:14,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:14,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787576908] [2024-06-21 21:42:14,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:14,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:14,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:14,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:14,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:42:14,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:14,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:14,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:42:14,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:15,735 INFO L124 PetriNetUnfolderBase]: 1146/1822 cut-off events. [2024-06-21 21:42:15,735 INFO L125 PetriNetUnfolderBase]: For 10199/10264 co-relation queries the response was YES. [2024-06-21 21:42:15,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7713 conditions, 1822 events. 1146/1822 cut-off events. For 10199/10264 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8828 event pairs, 381 based on Foata normal form. 18/1826 useless extension candidates. Maximal degree in co-relation 7683. Up to 1564 conditions per place. [2024-06-21 21:42:15,747 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 40 changer transitions 0/113 dead transitions. [2024-06-21 21:42:15,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 113 transitions, 920 flow [2024-06-21 21:42:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 21:42:15,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-21 21:42:15,751 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 528 flow. Second operand 7 states and 137 transitions. [2024-06-21 21:42:15,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 113 transitions, 920 flow [2024-06-21 21:42:15,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 831 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:15,763 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 605 flow [2024-06-21 21:42:15,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=605, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-21 21:42:15,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 21:42:15,765 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 605 flow [2024-06-21 21:42:15,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:15,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:15,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:15,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:42:15,766 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:15,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash 859329855, now seen corresponding path program 1 times [2024-06-21 21:42:15,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:15,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530797508] [2024-06-21 21:42:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:18,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:18,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530797508] [2024-06-21 21:42:18,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530797508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:18,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:18,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813938248] [2024-06-21 21:42:18,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:18,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:18,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:18,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:18,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 605 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:18,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:18,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:18,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:20,048 INFO L124 PetriNetUnfolderBase]: 1249/1960 cut-off events. [2024-06-21 21:42:20,048 INFO L125 PetriNetUnfolderBase]: For 10077/10081 co-relation queries the response was YES. [2024-06-21 21:42:20,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8080 conditions, 1960 events. 1249/1960 cut-off events. For 10077/10081 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9372 event pairs, 407 based on Foata normal form. 6/1964 useless extension candidates. Maximal degree in co-relation 8049. Up to 1774 conditions per place. [2024-06-21 21:42:20,058 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2024-06-21 21:42:20,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 130 transitions, 1073 flow [2024-06-21 21:42:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 21:42:20,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 21:42:20,061 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 605 flow. Second operand 7 states and 131 transitions. [2024-06-21 21:42:20,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 130 transitions, 1073 flow [2024-06-21 21:42:20,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 130 transitions, 1022 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:20,072 INFO L231 Difference]: Finished difference. Result has 82 places, 98 transitions, 727 flow [2024-06-21 21:42:20,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=727, PETRI_PLACES=82, PETRI_TRANSITIONS=98} [2024-06-21 21:42:20,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 21:42:20,073 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 98 transitions, 727 flow [2024-06-21 21:42:20,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:20,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:20,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:20,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:42:20,073 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:20,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:20,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1043602309, now seen corresponding path program 2 times [2024-06-21 21:42:20,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:20,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541713389] [2024-06-21 21:42:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:20,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:22,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:22,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541713389] [2024-06-21 21:42:22,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541713389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:22,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:22,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:22,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960004662] [2024-06-21 21:42:22,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:22,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:22,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:22,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:22,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 98 transitions, 727 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:22,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:22,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:22,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:23,949 INFO L124 PetriNetUnfolderBase]: 1262/1987 cut-off events. [2024-06-21 21:42:23,949 INFO L125 PetriNetUnfolderBase]: For 12033/12052 co-relation queries the response was YES. [2024-06-21 21:42:23,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8709 conditions, 1987 events. 1262/1987 cut-off events. For 12033/12052 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9588 event pairs, 404 based on Foata normal form. 16/2000 useless extension candidates. Maximal degree in co-relation 8674. Up to 1788 conditions per place. [2024-06-21 21:42:23,963 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 98 selfloop transitions, 29 changer transitions 0/132 dead transitions. [2024-06-21 21:42:23,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 132 transitions, 1147 flow [2024-06-21 21:42:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:42:23,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:42:23,965 INFO L175 Difference]: Start difference. First operand has 82 places, 98 transitions, 727 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:42:23,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 132 transitions, 1147 flow [2024-06-21 21:42:23,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 132 transitions, 1111 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:42:23,982 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 812 flow [2024-06-21 21:42:23,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=812, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-06-21 21:42:23,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 21:42:23,982 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 812 flow [2024-06-21 21:42:23,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:23,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:23,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:23,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:42:23,983 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:23,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:23,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1411735605, now seen corresponding path program 3 times [2024-06-21 21:42:23,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:23,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287182410] [2024-06-21 21:42:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:23,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:26,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:26,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287182410] [2024-06-21 21:42:26,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287182410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:26,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:26,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751223529] [2024-06-21 21:42:26,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:26,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:26,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:26,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 812 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:26,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:26,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:26,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:27,843 INFO L124 PetriNetUnfolderBase]: 1257/1980 cut-off events. [2024-06-21 21:42:27,843 INFO L125 PetriNetUnfolderBase]: For 13623/13642 co-relation queries the response was YES. [2024-06-21 21:42:27,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8874 conditions, 1980 events. 1257/1980 cut-off events. For 13623/13642 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9523 event pairs, 404 based on Foata normal form. 16/1993 useless extension candidates. Maximal degree in co-relation 8837. Up to 1783 conditions per place. [2024-06-21 21:42:27,857 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-06-21 21:42:27,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1142 flow [2024-06-21 21:42:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:42:27,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 21:42:27,860 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 812 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:42:27,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1142 flow [2024-06-21 21:42:27,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1111 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:42:27,879 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 845 flow [2024-06-21 21:42:27,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-06-21 21:42:27,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 21:42:27,880 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 845 flow [2024-06-21 21:42:27,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:27,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:27,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:27,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:42:27,881 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:27,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:27,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1411735791, now seen corresponding path program 4 times [2024-06-21 21:42:27,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:27,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303155442] [2024-06-21 21:42:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:27,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:30,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:30,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303155442] [2024-06-21 21:42:30,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303155442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:30,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:30,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892864739] [2024-06-21 21:42:30,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:30,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:30,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:42:30,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 845 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:30,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:30,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:42:30,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:31,667 INFO L124 PetriNetUnfolderBase]: 1185/1893 cut-off events. [2024-06-21 21:42:31,667 INFO L125 PetriNetUnfolderBase]: For 15902/16015 co-relation queries the response was YES. [2024-06-21 21:42:31,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8800 conditions, 1893 events. 1185/1893 cut-off events. For 15902/16015 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9298 event pairs, 365 based on Foata normal form. 22/1869 useless extension candidates. Maximal degree in co-relation 8761. Up to 1592 conditions per place. [2024-06-21 21:42:31,679 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 45 changer transitions 0/128 dead transitions. [2024-06-21 21:42:31,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 1139 flow [2024-06-21 21:42:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 21:42:31,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 21:42:31,682 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 845 flow. Second operand 7 states and 131 transitions. [2024-06-21 21:42:31,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 1139 flow [2024-06-21 21:42:31,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 128 transitions, 1069 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:31,706 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 874 flow [2024-06-21 21:42:31,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-21 21:42:31,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-21 21:42:31,707 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 874 flow [2024-06-21 21:42:31,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:31,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:31,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:31,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:42:31,708 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:31,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1542294721, now seen corresponding path program 1 times [2024-06-21 21:42:31,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:31,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45792166] [2024-06-21 21:42:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:31,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:33,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:33,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45792166] [2024-06-21 21:42:33,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45792166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:33,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:33,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:42:33,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817111276] [2024-06-21 21:42:33,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:33,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:42:33,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:42:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:42:33,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:33,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 874 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:33,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:33,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:33,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:34,959 INFO L124 PetriNetUnfolderBase]: 1241/1951 cut-off events. [2024-06-21 21:42:34,959 INFO L125 PetriNetUnfolderBase]: For 17145/17147 co-relation queries the response was YES. [2024-06-21 21:42:34,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9085 conditions, 1951 events. 1241/1951 cut-off events. For 17145/17147 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9366 event pairs, 390 based on Foata normal form. 4/1954 useless extension candidates. Maximal degree in co-relation 9045. Up to 1825 conditions per place. [2024-06-21 21:42:34,971 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 113 selfloop transitions, 13 changer transitions 0/131 dead transitions. [2024-06-21 21:42:34,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 1208 flow [2024-06-21 21:42:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:42:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:42:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:42:34,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:42:34,974 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 874 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:42:34,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 1208 flow [2024-06-21 21:42:34,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1090 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:34,998 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 805 flow [2024-06-21 21:42:34,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2024-06-21 21:42:34,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 21:42:34,999 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 805 flow [2024-06-21 21:42:35,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:35,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:35,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:35,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:42:35,000 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:35,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash 865698266, now seen corresponding path program 1 times [2024-06-21 21:42:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:35,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515393689] [2024-06-21 21:42:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:35,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:38,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515393689] [2024-06-21 21:42:38,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515393689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:38,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:38,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:38,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951343472] [2024-06-21 21:42:38,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:38,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:38,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:38,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:38,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 805 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:38,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:38,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:38,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:39,285 INFO L124 PetriNetUnfolderBase]: 1254/1978 cut-off events. [2024-06-21 21:42:39,286 INFO L125 PetriNetUnfolderBase]: For 18301/18309 co-relation queries the response was YES. [2024-06-21 21:42:39,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9274 conditions, 1978 events. 1254/1978 cut-off events. For 18301/18309 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9477 event pairs, 374 based on Foata normal form. 10/1987 useless extension candidates. Maximal degree in co-relation 9233. Up to 1776 conditions per place. [2024-06-21 21:42:39,300 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 25 changer transitions 0/158 dead transitions. [2024-06-21 21:42:39,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1332 flow [2024-06-21 21:42:39,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:42:39,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:42:39,302 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 805 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:42:39,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1332 flow [2024-06-21 21:42:39,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 158 transitions, 1301 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:42:39,326 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 987 flow [2024-06-21 21:42:39,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=987, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-21 21:42:39,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 21:42:39,327 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 987 flow [2024-06-21 21:42:39,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:39,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:39,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:39,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:42:39,328 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:39,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash 84260122, now seen corresponding path program 2 times [2024-06-21 21:42:39,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:39,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731343064] [2024-06-21 21:42:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:39,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:42,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:42,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731343064] [2024-06-21 21:42:42,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731343064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:42,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:42,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:42,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275110690] [2024-06-21 21:42:42,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:42,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:42,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:42,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:42,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:42,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:42,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 987 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:42,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:42,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:42,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:43,982 INFO L124 PetriNetUnfolderBase]: 1285/2032 cut-off events. [2024-06-21 21:42:43,982 INFO L125 PetriNetUnfolderBase]: For 21702/21704 co-relation queries the response was YES. [2024-06-21 21:42:43,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10067 conditions, 2032 events. 1285/2032 cut-off events. For 21702/21704 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9831 event pairs, 381 based on Foata normal form. 2/2032 useless extension candidates. Maximal degree in co-relation 10023. Up to 1667 conditions per place. [2024-06-21 21:42:43,992 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-21 21:42:43,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 171 transitions, 1643 flow [2024-06-21 21:42:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 21:42:43,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:42:43,996 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 987 flow. Second operand 8 states and 152 transitions. [2024-06-21 21:42:43,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 171 transitions, 1643 flow [2024-06-21 21:42:44,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 1591 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 21:42:44,026 INFO L231 Difference]: Finished difference. Result has 106 places, 134 transitions, 1193 flow [2024-06-21 21:42:44,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=106, PETRI_TRANSITIONS=134} [2024-06-21 21:42:44,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 21:42:44,027 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 134 transitions, 1193 flow [2024-06-21 21:42:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:44,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:44,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:44,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:42:44,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:44,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:44,029 INFO L85 PathProgramCache]: Analyzing trace with hash 869417336, now seen corresponding path program 3 times [2024-06-21 21:42:44,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:44,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937502356] [2024-06-21 21:42:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:46,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:46,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937502356] [2024-06-21 21:42:46,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937502356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:46,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:46,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:46,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558096671] [2024-06-21 21:42:46,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:46,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:46,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:46,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:46,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:46,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:46,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 134 transitions, 1193 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:46,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:46,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:46,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:48,402 INFO L124 PetriNetUnfolderBase]: 1280/2025 cut-off events. [2024-06-21 21:42:48,402 INFO L125 PetriNetUnfolderBase]: For 24890/24892 co-relation queries the response was YES. [2024-06-21 21:42:48,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10724 conditions, 2025 events. 1280/2025 cut-off events. For 24890/24892 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9828 event pairs, 381 based on Foata normal form. 2/2025 useless extension candidates. Maximal degree in co-relation 10677. Up to 1662 conditions per place. [2024-06-21 21:42:48,415 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 116 selfloop transitions, 48 changer transitions 0/169 dead transitions. [2024-06-21 21:42:48,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 169 transitions, 1684 flow [2024-06-21 21:42:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:42:48,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:42:48,417 INFO L175 Difference]: Start difference. First operand has 106 places, 134 transitions, 1193 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:42:48,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 169 transitions, 1684 flow [2024-06-21 21:42:48,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 169 transitions, 1640 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 21:42:48,458 INFO L231 Difference]: Finished difference. Result has 112 places, 134 transitions, 1253 flow [2024-06-21 21:42:48,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1253, PETRI_PLACES=112, PETRI_TRANSITIONS=134} [2024-06-21 21:42:48,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-21 21:42:48,459 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 134 transitions, 1253 flow [2024-06-21 21:42:48,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:48,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:48,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:48,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:42:48,460 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:48,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2000716326, now seen corresponding path program 4 times [2024-06-21 21:42:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:48,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864622530] [2024-06-21 21:42:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:48,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:51,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:51,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864622530] [2024-06-21 21:42:51,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864622530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:51,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:51,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:51,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190202374] [2024-06-21 21:42:51,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:51,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:51,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:51,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:51,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 134 transitions, 1253 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:51,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:51,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:51,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:52,803 INFO L124 PetriNetUnfolderBase]: 1311/2080 cut-off events. [2024-06-21 21:42:52,804 INFO L125 PetriNetUnfolderBase]: For 28479/28496 co-relation queries the response was YES. [2024-06-21 21:42:52,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11358 conditions, 2080 events. 1311/2080 cut-off events. For 28479/28496 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10116 event pairs, 385 based on Foata normal form. 6/2080 useless extension candidates. Maximal degree in co-relation 11309. Up to 1695 conditions per place. [2024-06-21 21:42:52,817 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 115 selfloop transitions, 54 changer transitions 0/174 dead transitions. [2024-06-21 21:42:52,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 174 transitions, 1904 flow [2024-06-21 21:42:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:42:52,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 21:42:52,819 INFO L175 Difference]: Start difference. First operand has 112 places, 134 transitions, 1253 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:42:52,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 174 transitions, 1904 flow [2024-06-21 21:42:52,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 174 transitions, 1781 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:52,852 INFO L231 Difference]: Finished difference. Result has 115 places, 141 transitions, 1346 flow [2024-06-21 21:42:52,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1346, PETRI_PLACES=115, PETRI_TRANSITIONS=141} [2024-06-21 21:42:52,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 21:42:52,852 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 141 transitions, 1346 flow [2024-06-21 21:42:52,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:52,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:52,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:52,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:42:52,853 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:52,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2065527160, now seen corresponding path program 5 times [2024-06-21 21:42:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:52,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955735313] [2024-06-21 21:42:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:42:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:42:55,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:42:55,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955735313] [2024-06-21 21:42:55,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955735313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:42:55,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:42:55,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:42:55,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796423623] [2024-06-21 21:42:55,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:42:55,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:42:55,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:42:55,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:42:55,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:42:55,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:42:55,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 141 transitions, 1346 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:55,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:42:55,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:42:55,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:42:57,228 INFO L124 PetriNetUnfolderBase]: 1306/2073 cut-off events. [2024-06-21 21:42:57,229 INFO L125 PetriNetUnfolderBase]: For 30538/30555 co-relation queries the response was YES. [2024-06-21 21:42:57,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11452 conditions, 2073 events. 1306/2073 cut-off events. For 30538/30555 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10077 event pairs, 385 based on Foata normal form. 6/2073 useless extension candidates. Maximal degree in co-relation 11401. Up to 1690 conditions per place. [2024-06-21 21:42:57,239 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 55 changer transitions 0/172 dead transitions. [2024-06-21 21:42:57,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 172 transitions, 1838 flow [2024-06-21 21:42:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:42:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:42:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:42:57,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 21:42:57,241 INFO L175 Difference]: Start difference. First operand has 115 places, 141 transitions, 1346 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:42:57,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 172 transitions, 1838 flow [2024-06-21 21:42:57,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 172 transitions, 1671 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:42:57,271 INFO L231 Difference]: Finished difference. Result has 117 places, 141 transitions, 1297 flow [2024-06-21 21:42:57,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1297, PETRI_PLACES=117, PETRI_TRANSITIONS=141} [2024-06-21 21:42:57,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-21 21:42:57,272 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 141 transitions, 1297 flow [2024-06-21 21:42:57,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:42:57,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:42:57,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:42:57,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:42:57,272 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:42:57,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:42:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash -813927798, now seen corresponding path program 6 times [2024-06-21 21:42:57,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:42:57,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492621742] [2024-06-21 21:42:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:42:57,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:42:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:00,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492621742] [2024-06-21 21:43:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492621742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:00,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742703771] [2024-06-21 21:43:00,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:00,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:00,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:00,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:00,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 141 transitions, 1297 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:00,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:00,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:00,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:01,557 INFO L124 PetriNetUnfolderBase]: 1301/2066 cut-off events. [2024-06-21 21:43:01,557 INFO L125 PetriNetUnfolderBase]: For 32036/32053 co-relation queries the response was YES. [2024-06-21 21:43:01,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11356 conditions, 2066 events. 1301/2066 cut-off events. For 32036/32053 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10035 event pairs, 385 based on Foata normal form. 6/2066 useless extension candidates. Maximal degree in co-relation 11305. Up to 1685 conditions per place. [2024-06-21 21:43:01,571 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 107 selfloop transitions, 59 changer transitions 0/171 dead transitions. [2024-06-21 21:43:01,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 171 transitions, 1723 flow [2024-06-21 21:43:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:43:01,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:43:01,572 INFO L175 Difference]: Start difference. First operand has 117 places, 141 transitions, 1297 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:43:01,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 171 transitions, 1723 flow [2024-06-21 21:43:01,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 171 transitions, 1595 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:01,612 INFO L231 Difference]: Finished difference. Result has 119 places, 142 transitions, 1307 flow [2024-06-21 21:43:01,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1307, PETRI_PLACES=119, PETRI_TRANSITIONS=142} [2024-06-21 21:43:01,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 21:43:01,612 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 142 transitions, 1307 flow [2024-06-21 21:43:01,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:01,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:01,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:01,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:43:01,613 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:01,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1263212894, now seen corresponding path program 1 times [2024-06-21 21:43:01,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:01,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771136149] [2024-06-21 21:43:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:01,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:04,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:04,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771136149] [2024-06-21 21:43:04,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771136149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:04,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:04,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:04,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843885703] [2024-06-21 21:43:04,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:04,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:04,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:04,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:43:04,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 142 transitions, 1307 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:04,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:04,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:43:04,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:05,962 INFO L124 PetriNetUnfolderBase]: 1307/2102 cut-off events. [2024-06-21 21:43:05,962 INFO L125 PetriNetUnfolderBase]: For 39320/39346 co-relation queries the response was YES. [2024-06-21 21:43:05,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11955 conditions, 2102 events. 1307/2102 cut-off events. For 39320/39346 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10595 event pairs, 212 based on Foata normal form. 20/2077 useless extension candidates. Maximal degree in co-relation 11903. Up to 1677 conditions per place. [2024-06-21 21:43:05,975 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 48 changer transitions 0/192 dead transitions. [2024-06-21 21:43:05,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 192 transitions, 1903 flow [2024-06-21 21:43:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:43:05,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:43:05,977 INFO L175 Difference]: Start difference. First operand has 119 places, 142 transitions, 1307 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:43:05,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 192 transitions, 1903 flow [2024-06-21 21:43:06,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 192 transitions, 1810 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:06,010 INFO L231 Difference]: Finished difference. Result has 123 places, 146 transitions, 1373 flow [2024-06-21 21:43:06,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1373, PETRI_PLACES=123, PETRI_TRANSITIONS=146} [2024-06-21 21:43:06,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 21:43:06,011 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 146 transitions, 1373 flow [2024-06-21 21:43:06,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:06,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:06,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:06,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:43:06,012 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:06,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1407428652, now seen corresponding path program 2 times [2024-06-21 21:43:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:06,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467224716] [2024-06-21 21:43:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:06,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:09,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:09,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467224716] [2024-06-21 21:43:09,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467224716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:09,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:09,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:09,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345811160] [2024-06-21 21:43:09,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:09,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:09,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:09,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:09,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:09,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:43:09,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 146 transitions, 1373 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:09,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:09,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:43:09,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:10,414 INFO L124 PetriNetUnfolderBase]: 1295/2084 cut-off events. [2024-06-21 21:43:10,414 INFO L125 PetriNetUnfolderBase]: For 42158/42191 co-relation queries the response was YES. [2024-06-21 21:43:10,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12031 conditions, 2084 events. 1295/2084 cut-off events. For 42158/42191 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10482 event pairs, 297 based on Foata normal form. 18/2058 useless extension candidates. Maximal degree in co-relation 11978. Up to 1758 conditions per place. [2024-06-21 21:43:10,426 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 114 selfloop transitions, 44 changer transitions 0/184 dead transitions. [2024-06-21 21:43:10,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 184 transitions, 1801 flow [2024-06-21 21:43:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 21:43:10,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:43:10,428 INFO L175 Difference]: Start difference. First operand has 123 places, 146 transitions, 1373 flow. Second operand 8 states and 152 transitions. [2024-06-21 21:43:10,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 184 transitions, 1801 flow [2024-06-21 21:43:10,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1704 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:10,462 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1374 flow [2024-06-21 21:43:10,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1374, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-21 21:43:10,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 21:43:10,463 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1374 flow [2024-06-21 21:43:10,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:10,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:10,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:10,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:43:10,463 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:10,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1182130084, now seen corresponding path program 3 times [2024-06-21 21:43:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:10,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776371425] [2024-06-21 21:43:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:13,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:13,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:13,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776371425] [2024-06-21 21:43:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776371425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:13,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:13,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:13,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521435209] [2024-06-21 21:43:13,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:13,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:13,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:13,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:13,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:43:13,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1374 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:13,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:13,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:43:13,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:15,025 INFO L124 PetriNetUnfolderBase]: 1319/2121 cut-off events. [2024-06-21 21:43:15,026 INFO L125 PetriNetUnfolderBase]: For 46117/46136 co-relation queries the response was YES. [2024-06-21 21:43:15,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12365 conditions, 2121 events. 1319/2121 cut-off events. For 46117/46136 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10730 event pairs, 308 based on Foata normal form. 6/2075 useless extension candidates. Maximal degree in co-relation 12310. Up to 1729 conditions per place. [2024-06-21 21:43:15,039 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 61 changer transitions 0/181 dead transitions. [2024-06-21 21:43:15,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 181 transitions, 1806 flow [2024-06-21 21:43:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 21:43:15,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:43:15,041 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1374 flow. Second operand 8 states and 152 transitions. [2024-06-21 21:43:15,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 181 transitions, 1806 flow [2024-06-21 21:43:15,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 181 transitions, 1708 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:15,088 INFO L231 Difference]: Finished difference. Result has 127 places, 148 transitions, 1440 flow [2024-06-21 21:43:15,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1440, PETRI_PLACES=127, PETRI_TRANSITIONS=148} [2024-06-21 21:43:15,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-21 21:43:15,089 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 148 transitions, 1440 flow [2024-06-21 21:43:15,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:15,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:15,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:15,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:43:15,089 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:15,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1289156274, now seen corresponding path program 1 times [2024-06-21 21:43:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976949588] [2024-06-21 21:43:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:15,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:18,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:18,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976949588] [2024-06-21 21:43:18,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976949588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:18,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:18,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:18,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894065327] [2024-06-21 21:43:18,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:18,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:18,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:18,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:18,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:18,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 148 transitions, 1440 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:18,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:18,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:18,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:19,697 INFO L124 PetriNetUnfolderBase]: 1405/2235 cut-off events. [2024-06-21 21:43:19,697 INFO L125 PetriNetUnfolderBase]: For 46365/46377 co-relation queries the response was YES. [2024-06-21 21:43:19,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12904 conditions, 2235 events. 1405/2235 cut-off events. For 46365/46377 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11148 event pairs, 346 based on Foata normal form. 16/2249 useless extension candidates. Maximal degree in co-relation 12848. Up to 1990 conditions per place. [2024-06-21 21:43:19,711 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 30 changer transitions 0/185 dead transitions. [2024-06-21 21:43:19,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 185 transitions, 1918 flow [2024-06-21 21:43:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:43:19,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:43:19,713 INFO L175 Difference]: Start difference. First operand has 127 places, 148 transitions, 1440 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:43:19,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 185 transitions, 1918 flow [2024-06-21 21:43:19,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 185 transitions, 1774 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:19,769 INFO L231 Difference]: Finished difference. Result has 129 places, 150 transitions, 1381 flow [2024-06-21 21:43:19,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1296, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1381, PETRI_PLACES=129, PETRI_TRANSITIONS=150} [2024-06-21 21:43:19,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-21 21:43:19,769 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 150 transitions, 1381 flow [2024-06-21 21:43:19,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:19,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:19,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:19,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:43:19,770 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:19,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:19,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1544794632, now seen corresponding path program 4 times [2024-06-21 21:43:19,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:19,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816229546] [2024-06-21 21:43:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:19,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:22,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816229546] [2024-06-21 21:43:22,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816229546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:22,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:22,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:22,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408518880] [2024-06-21 21:43:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:22,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:43:22,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 150 transitions, 1381 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:22,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:22,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:43:22,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:23,870 INFO L124 PetriNetUnfolderBase]: 1330/2136 cut-off events. [2024-06-21 21:43:23,871 INFO L125 PetriNetUnfolderBase]: For 51648/51686 co-relation queries the response was YES. [2024-06-21 21:43:23,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12675 conditions, 2136 events. 1330/2136 cut-off events. For 51648/51686 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10791 event pairs, 312 based on Foata normal form. 10/2087 useless extension candidates. Maximal degree in co-relation 12618. Up to 1745 conditions per place. [2024-06-21 21:43:23,886 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-06-21 21:43:23,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 1809 flow [2024-06-21 21:43:23,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:43:23,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:43:23,888 INFO L175 Difference]: Start difference. First operand has 129 places, 150 transitions, 1381 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:43:23,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 1809 flow [2024-06-21 21:43:23,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 182 transitions, 1742 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:23,933 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1482 flow [2024-06-21 21:43:23,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1482, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-21 21:43:23,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 21:43:23,933 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1482 flow [2024-06-21 21:43:23,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:23,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:23,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:23,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:43:23,934 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:23,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash -165085188, now seen corresponding path program 2 times [2024-06-21 21:43:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:23,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812155716] [2024-06-21 21:43:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:27,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:27,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812155716] [2024-06-21 21:43:27,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812155716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:27,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:27,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:27,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217850893] [2024-06-21 21:43:27,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:27,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:27,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:27,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:27,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:27,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1482 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:27,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:27,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:27,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:28,295 INFO L124 PetriNetUnfolderBase]: 1412/2250 cut-off events. [2024-06-21 21:43:28,295 INFO L125 PetriNetUnfolderBase]: For 51487/51515 co-relation queries the response was YES. [2024-06-21 21:43:28,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13202 conditions, 2250 events. 1412/2250 cut-off events. For 51487/51515 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11246 event pairs, 346 based on Foata normal form. 24/2271 useless extension candidates. Maximal degree in co-relation 13144. Up to 2003 conditions per place. [2024-06-21 21:43:28,310 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-21 21:43:28,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 186 transitions, 1958 flow [2024-06-21 21:43:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:43:28,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:43:28,312 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1482 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:43:28,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 186 transitions, 1958 flow [2024-06-21 21:43:28,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 186 transitions, 1810 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:28,361 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1425 flow [2024-06-21 21:43:28,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1425, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-21 21:43:28,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 21:43:28,361 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1425 flow [2024-06-21 21:43:28,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:28,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:28,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:28,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:43:28,362 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:28,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:28,362 INFO L85 PathProgramCache]: Analyzing trace with hash -156514308, now seen corresponding path program 3 times [2024-06-21 21:43:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:28,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836719426] [2024-06-21 21:43:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:28,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:30,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836719426] [2024-06-21 21:43:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836719426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:30,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:30,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:30,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870314685] [2024-06-21 21:43:30,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:30,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:30,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:30,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:30,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:30,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:30,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1425 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:30,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:30,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:30,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:32,037 INFO L124 PetriNetUnfolderBase]: 1432/2282 cut-off events. [2024-06-21 21:43:32,037 INFO L125 PetriNetUnfolderBase]: For 54410/54438 co-relation queries the response was YES. [2024-06-21 21:43:32,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13423 conditions, 2282 events. 1432/2282 cut-off events. For 54410/54438 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11478 event pairs, 310 based on Foata normal form. 24/2303 useless extension candidates. Maximal degree in co-relation 13364. Up to 1935 conditions per place. [2024-06-21 21:43:32,054 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 150 selfloop transitions, 38 changer transitions 0/193 dead transitions. [2024-06-21 21:43:32,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 193 transitions, 2051 flow [2024-06-21 21:43:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:32,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:43:32,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:43:32,056 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1425 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:43:32,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 193 transitions, 2051 flow [2024-06-21 21:43:32,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 193 transitions, 1978 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:43:32,106 INFO L231 Difference]: Finished difference. Result has 135 places, 158 transitions, 1483 flow [2024-06-21 21:43:32,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=135, PETRI_TRANSITIONS=158} [2024-06-21 21:43:32,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 21:43:32,107 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 158 transitions, 1483 flow [2024-06-21 21:43:32,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:32,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:32,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:32,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:43:32,108 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:32,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash -392986338, now seen corresponding path program 4 times [2024-06-21 21:43:32,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:32,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799467279] [2024-06-21 21:43:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:32,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:35,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799467279] [2024-06-21 21:43:35,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799467279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:35,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:35,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:43:35,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95981918] [2024-06-21 21:43:35,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:35,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:43:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:35,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:43:35,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:43:35,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:35,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 158 transitions, 1483 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:35,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:35,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:35,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:36,465 INFO L124 PetriNetUnfolderBase]: 1424/2270 cut-off events. [2024-06-21 21:43:36,465 INFO L125 PetriNetUnfolderBase]: For 57189/57217 co-relation queries the response was YES. [2024-06-21 21:43:36,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13542 conditions, 2270 events. 1424/2270 cut-off events. For 57189/57217 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11430 event pairs, 344 based on Foata normal form. 24/2291 useless extension candidates. Maximal degree in co-relation 13482. Up to 2023 conditions per place. [2024-06-21 21:43:36,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 30 changer transitions 0/190 dead transitions. [2024-06-21 21:43:36,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 190 transitions, 1949 flow [2024-06-21 21:43:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:43:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:43:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 21:43:36,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 21:43:36,482 INFO L175 Difference]: Start difference. First operand has 135 places, 158 transitions, 1483 flow. Second operand 8 states and 141 transitions. [2024-06-21 21:43:36,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 190 transitions, 1949 flow [2024-06-21 21:43:36,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 190 transitions, 1888 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 21:43:36,533 INFO L231 Difference]: Finished difference. Result has 139 places, 158 transitions, 1489 flow [2024-06-21 21:43:36,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1489, PETRI_PLACES=139, PETRI_TRANSITIONS=158} [2024-06-21 21:43:36,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 21:43:36,534 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 158 transitions, 1489 flow [2024-06-21 21:43:36,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:36,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:36,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:36,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:43:36,535 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:36,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1443052179, now seen corresponding path program 1 times [2024-06-21 21:43:36,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:36,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590119612] [2024-06-21 21:43:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:38,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:38,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590119612] [2024-06-21 21:43:38,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590119612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:38,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:38,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:43:38,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787436662] [2024-06-21 21:43:38,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:38,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:43:38,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:38,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:43:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:43:38,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:43:38,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 158 transitions, 1489 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:38,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:38,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:43:38,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:39,199 INFO L124 PetriNetUnfolderBase]: 1314/2145 cut-off events. [2024-06-21 21:43:39,199 INFO L125 PetriNetUnfolderBase]: For 57877/57911 co-relation queries the response was YES. [2024-06-21 21:43:39,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12935 conditions, 2145 events. 1314/2145 cut-off events. For 57877/57911 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11161 event pairs, 343 based on Foata normal form. 34/2176 useless extension candidates. Maximal degree in co-relation 12873. Up to 1925 conditions per place. [2024-06-21 21:43:39,214 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 141 selfloop transitions, 10 changer transitions 0/172 dead transitions. [2024-06-21 21:43:39,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 172 transitions, 1841 flow [2024-06-21 21:43:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:43:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:43:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 21:43:39,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:43:39,215 INFO L175 Difference]: Start difference. First operand has 139 places, 158 transitions, 1489 flow. Second operand 5 states and 90 transitions. [2024-06-21 21:43:39,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 172 transitions, 1841 flow [2024-06-21 21:43:39,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 172 transitions, 1762 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:39,283 INFO L231 Difference]: Finished difference. Result has 137 places, 161 transitions, 1462 flow [2024-06-21 21:43:39,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1462, PETRI_PLACES=137, PETRI_TRANSITIONS=161} [2024-06-21 21:43:39,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 21:43:39,284 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 161 transitions, 1462 flow [2024-06-21 21:43:39,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:39,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:39,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:39,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:43:39,285 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:39,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:39,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1376296421, now seen corresponding path program 1 times [2024-06-21 21:43:39,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923868257] [2024-06-21 21:43:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:42,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:42,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923868257] [2024-06-21 21:43:42,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923868257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:42,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:42,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:42,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114280141] [2024-06-21 21:43:42,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:42,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:42,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:42,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:42,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:42,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:42,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 161 transitions, 1462 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:42,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:42,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:42,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:43,850 INFO L124 PetriNetUnfolderBase]: 1562/2504 cut-off events. [2024-06-21 21:43:43,850 INFO L125 PetriNetUnfolderBase]: For 72402/72414 co-relation queries the response was YES. [2024-06-21 21:43:43,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15160 conditions, 2504 events. 1562/2504 cut-off events. For 72402/72414 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13010 event pairs, 249 based on Foata normal form. 24/2527 useless extension candidates. Maximal degree in co-relation 15097. Up to 1924 conditions per place. [2024-06-21 21:43:43,869 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 28 changer transitions 0/224 dead transitions. [2024-06-21 21:43:43,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 224 transitions, 2256 flow [2024-06-21 21:43:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:43:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:43:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:43:43,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:43:43,871 INFO L175 Difference]: Start difference. First operand has 137 places, 161 transitions, 1462 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:43:43,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 224 transitions, 2256 flow [2024-06-21 21:43:43,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 224 transitions, 2226 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:43:43,938 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1565 flow [2024-06-21 21:43:43,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1565, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-06-21 21:43:43,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 21:43:43,939 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1565 flow [2024-06-21 21:43:43,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:43,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:43,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:43,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:43:43,939 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:43,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1287582791, now seen corresponding path program 2 times [2024-06-21 21:43:43,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:43,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714279897] [2024-06-21 21:43:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:47,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:47,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714279897] [2024-06-21 21:43:47,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714279897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:47,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:47,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701389764] [2024-06-21 21:43:47,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:47,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:47,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:47,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:47,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1565 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:47,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:47,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:47,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:48,565 INFO L124 PetriNetUnfolderBase]: 1602/2588 cut-off events. [2024-06-21 21:43:48,565 INFO L125 PetriNetUnfolderBase]: For 77793/77805 co-relation queries the response was YES. [2024-06-21 21:43:48,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15730 conditions, 2588 events. 1602/2588 cut-off events. For 77793/77805 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13683 event pairs, 372 based on Foata normal form. 28/2615 useless extension candidates. Maximal degree in co-relation 15664. Up to 2238 conditions per place. [2024-06-21 21:43:48,585 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 182 selfloop transitions, 26 changer transitions 0/213 dead transitions. [2024-06-21 21:43:48,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 213 transitions, 2148 flow [2024-06-21 21:43:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:43:48,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:43:48,587 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1565 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:43:48,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 213 transitions, 2148 flow [2024-06-21 21:43:48,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 213 transitions, 2094 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:48,677 INFO L231 Difference]: Finished difference. Result has 150 places, 167 transitions, 1589 flow [2024-06-21 21:43:48,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1589, PETRI_PLACES=150, PETRI_TRANSITIONS=167} [2024-06-21 21:43:48,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 21:43:48,677 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 167 transitions, 1589 flow [2024-06-21 21:43:48,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:48,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:48,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:48,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:43:48,678 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:48,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash -593922069, now seen corresponding path program 3 times [2024-06-21 21:43:48,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:48,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789216689] [2024-06-21 21:43:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:52,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:52,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789216689] [2024-06-21 21:43:52,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789216689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:52,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:52,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:52,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552032119] [2024-06-21 21:43:52,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:52,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:52,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:52,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:52,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:52,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:52,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 167 transitions, 1589 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:52,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:52,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:52,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:53,987 INFO L124 PetriNetUnfolderBase]: 1582/2556 cut-off events. [2024-06-21 21:43:53,987 INFO L125 PetriNetUnfolderBase]: For 75083/75095 co-relation queries the response was YES. [2024-06-21 21:43:53,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15421 conditions, 2556 events. 1582/2556 cut-off events. For 75083/75095 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13486 event pairs, 338 based on Foata normal form. 24/2579 useless extension candidates. Maximal degree in co-relation 15353. Up to 2094 conditions per place. [2024-06-21 21:43:54,006 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 27 changer transitions 0/219 dead transitions. [2024-06-21 21:43:54,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 219 transitions, 2220 flow [2024-06-21 21:43:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:54,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:43:54,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 21:43:54,008 INFO L175 Difference]: Start difference. First operand has 150 places, 167 transitions, 1589 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:43:54,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 219 transitions, 2220 flow [2024-06-21 21:43:54,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 219 transitions, 2147 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 21:43:54,086 INFO L231 Difference]: Finished difference. Result has 153 places, 170 transitions, 1626 flow [2024-06-21 21:43:54,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1626, PETRI_PLACES=153, PETRI_TRANSITIONS=170} [2024-06-21 21:43:54,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 21:43:54,087 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 170 transitions, 1626 flow [2024-06-21 21:43:54,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:54,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:54,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:54,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:43:54,088 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:54,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:54,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1309352845, now seen corresponding path program 4 times [2024-06-21 21:43:54,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:54,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287003209] [2024-06-21 21:43:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:54,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:43:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:43:57,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:43:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287003209] [2024-06-21 21:43:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287003209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:43:57,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:43:57,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:43:57,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723154656] [2024-06-21 21:43:57,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:43:57,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:43:57,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:43:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:43:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:43:57,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:43:57,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 170 transitions, 1626 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:57,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:43:57,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:43:57,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:43:59,226 INFO L124 PetriNetUnfolderBase]: 1650/2681 cut-off events. [2024-06-21 21:43:59,226 INFO L125 PetriNetUnfolderBase]: For 82093/82095 co-relation queries the response was YES. [2024-06-21 21:43:59,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16009 conditions, 2681 events. 1650/2681 cut-off events. For 82093/82095 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14437 event pairs, 394 based on Foata normal form. 16/2695 useless extension candidates. Maximal degree in co-relation 15939. Up to 2162 conditions per place. [2024-06-21 21:43:59,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 149 selfloop transitions, 58 changer transitions 0/212 dead transitions. [2024-06-21 21:43:59,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 212 transitions, 2186 flow [2024-06-21 21:43:59,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:43:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:43:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:43:59,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 21:43:59,247 INFO L175 Difference]: Start difference. First operand has 153 places, 170 transitions, 1626 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:43:59,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 212 transitions, 2186 flow [2024-06-21 21:43:59,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 212 transitions, 2154 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 21:43:59,345 INFO L231 Difference]: Finished difference. Result has 157 places, 171 transitions, 1735 flow [2024-06-21 21:43:59,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1735, PETRI_PLACES=157, PETRI_TRANSITIONS=171} [2024-06-21 21:43:59,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 21:43:59,346 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 171 transitions, 1735 flow [2024-06-21 21:43:59,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:43:59,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:43:59,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:43:59,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:43:59,347 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:43:59,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:43:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash -635724755, now seen corresponding path program 5 times [2024-06-21 21:43:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:43:59,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606715986] [2024-06-21 21:43:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:43:59,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:43:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:02,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606715986] [2024-06-21 21:44:02,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606715986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:02,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:02,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:02,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175929296] [2024-06-21 21:44:02,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:02,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:02,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:02,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 171 transitions, 1735 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:02,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:02,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:02,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:04,555 INFO L124 PetriNetUnfolderBase]: 1718/2809 cut-off events. [2024-06-21 21:44:04,555 INFO L125 PetriNetUnfolderBase]: For 88019/88021 co-relation queries the response was YES. [2024-06-21 21:44:04,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16924 conditions, 2809 events. 1718/2809 cut-off events. For 88019/88021 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15472 event pairs, 412 based on Foata normal form. 16/2823 useless extension candidates. Maximal degree in co-relation 16852. Up to 2278 conditions per place. [2024-06-21 21:44:04,575 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 56 changer transitions 0/213 dead transitions. [2024-06-21 21:44:04,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 213 transitions, 2299 flow [2024-06-21 21:44:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:04,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:44:04,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:44:04,576 INFO L175 Difference]: Start difference. First operand has 157 places, 171 transitions, 1735 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:44:04,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 213 transitions, 2299 flow [2024-06-21 21:44:04,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 213 transitions, 2176 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:04,665 INFO L231 Difference]: Finished difference. Result has 159 places, 172 transitions, 1751 flow [2024-06-21 21:44:04,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1751, PETRI_PLACES=159, PETRI_TRANSITIONS=172} [2024-06-21 21:44:04,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 21:44:04,666 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 172 transitions, 1751 flow [2024-06-21 21:44:04,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:04,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:04,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:04,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:44:04,666 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:04,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:04,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2008671687, now seen corresponding path program 6 times [2024-06-21 21:44:04,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:04,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7201422] [2024-06-21 21:44:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:04,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:08,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7201422] [2024-06-21 21:44:08,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7201422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:08,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:08,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19697920] [2024-06-21 21:44:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:08,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:08,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:08,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:08,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:08,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 172 transitions, 1751 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:08,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:08,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:08,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:09,626 INFO L124 PetriNetUnfolderBase]: 1766/2893 cut-off events. [2024-06-21 21:44:09,626 INFO L125 PetriNetUnfolderBase]: For 90822/90824 co-relation queries the response was YES. [2024-06-21 21:44:09,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17364 conditions, 2893 events. 1766/2893 cut-off events. For 90822/90824 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16094 event pairs, 404 based on Foata normal form. 12/2903 useless extension candidates. Maximal degree in co-relation 17291. Up to 2144 conditions per place. [2024-06-21 21:44:09,649 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 59 changer transitions 0/219 dead transitions. [2024-06-21 21:44:09,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 219 transitions, 2367 flow [2024-06-21 21:44:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:44:09,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:44:09,651 INFO L175 Difference]: Start difference. First operand has 159 places, 172 transitions, 1751 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:44:09,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 219 transitions, 2367 flow [2024-06-21 21:44:09,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 219 transitions, 2246 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:09,745 INFO L231 Difference]: Finished difference. Result has 162 places, 175 transitions, 1811 flow [2024-06-21 21:44:09,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1811, PETRI_PLACES=162, PETRI_TRANSITIONS=175} [2024-06-21 21:44:09,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 21:44:09,746 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 175 transitions, 1811 flow [2024-06-21 21:44:09,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:09,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:09,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:44:09,747 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:09,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash -231940059, now seen corresponding path program 1 times [2024-06-21 21:44:09,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:09,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981253087] [2024-06-21 21:44:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981253087] [2024-06-21 21:44:13,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981253087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:13,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:13,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:13,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961399820] [2024-06-21 21:44:13,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:13,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:13,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:13,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 175 transitions, 1811 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:13,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:13,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:13,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:15,081 INFO L124 PetriNetUnfolderBase]: 1814/2989 cut-off events. [2024-06-21 21:44:15,081 INFO L125 PetriNetUnfolderBase]: For 96333/96335 co-relation queries the response was YES. [2024-06-21 21:44:15,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17919 conditions, 2989 events. 1814/2989 cut-off events. For 96333/96335 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16838 event pairs, 420 based on Foata normal form. 12/2999 useless extension candidates. Maximal degree in co-relation 17844. Up to 2116 conditions per place. [2024-06-21 21:44:15,102 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 153 selfloop transitions, 62 changer transitions 0/220 dead transitions. [2024-06-21 21:44:15,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 220 transitions, 2409 flow [2024-06-21 21:44:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:15,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:44:15,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:44:15,104 INFO L175 Difference]: Start difference. First operand has 162 places, 175 transitions, 1811 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:44:15,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 220 transitions, 2409 flow [2024-06-21 21:44:15,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 220 transitions, 2320 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:15,226 INFO L231 Difference]: Finished difference. Result has 166 places, 176 transitions, 1876 flow [2024-06-21 21:44:15,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1876, PETRI_PLACES=166, PETRI_TRANSITIONS=176} [2024-06-21 21:44:15,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 21:44:15,227 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 176 transitions, 1876 flow [2024-06-21 21:44:15,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:15,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:15,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:15,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:44:15,228 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:15,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1313048039, now seen corresponding path program 7 times [2024-06-21 21:44:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:15,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101753005] [2024-06-21 21:44:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:15,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:18,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:18,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101753005] [2024-06-21 21:44:18,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101753005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:18,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:18,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:18,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113084098] [2024-06-21 21:44:18,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:18,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:18,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:18,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:18,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:18,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:18,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 176 transitions, 1876 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:18,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:18,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:18,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:20,100 INFO L124 PetriNetUnfolderBase]: 1882/3103 cut-off events. [2024-06-21 21:44:20,100 INFO L125 PetriNetUnfolderBase]: For 104986/105003 co-relation queries the response was YES. [2024-06-21 21:44:20,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18804 conditions, 3103 events. 1882/3103 cut-off events. For 104986/105003 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17768 event pairs, 458 based on Foata normal form. 20/3117 useless extension candidates. Maximal degree in co-relation 18727. Up to 2562 conditions per place. [2024-06-21 21:44:20,121 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 150 selfloop transitions, 60 changer transitions 0/215 dead transitions. [2024-06-21 21:44:20,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 215 transitions, 2442 flow [2024-06-21 21:44:20,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:44:20,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:44:20,123 INFO L175 Difference]: Start difference. First operand has 166 places, 176 transitions, 1876 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:44:20,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 215 transitions, 2442 flow [2024-06-21 21:44:20,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 215 transitions, 2302 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:20,258 INFO L231 Difference]: Finished difference. Result has 168 places, 177 transitions, 1889 flow [2024-06-21 21:44:20,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1889, PETRI_PLACES=168, PETRI_TRANSITIONS=177} [2024-06-21 21:44:20,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 21:44:20,259 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 177 transitions, 1889 flow [2024-06-21 21:44:20,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:20,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:20,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:20,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:44:20,259 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:20,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1976663391, now seen corresponding path program 8 times [2024-06-21 21:44:20,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:20,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498538240] [2024-06-21 21:44:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:20,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:23,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:23,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498538240] [2024-06-21 21:44:23,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498538240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:23,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:23,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:23,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74028597] [2024-06-21 21:44:23,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:23,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:23,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:23,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:23,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 177 transitions, 1889 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:23,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:23,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:23,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:25,208 INFO L124 PetriNetUnfolderBase]: 1950/3219 cut-off events. [2024-06-21 21:44:25,208 INFO L125 PetriNetUnfolderBase]: For 111054/111071 co-relation queries the response was YES. [2024-06-21 21:44:25,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19392 conditions, 3219 events. 1950/3219 cut-off events. For 111054/111071 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18652 event pairs, 470 based on Foata normal form. 20/3233 useless extension candidates. Maximal degree in co-relation 19314. Up to 2678 conditions per place. [2024-06-21 21:44:25,236 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 56 changer transitions 0/216 dead transitions. [2024-06-21 21:44:25,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 216 transitions, 2459 flow [2024-06-21 21:44:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:44:25,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:44:25,237 INFO L175 Difference]: Start difference. First operand has 168 places, 177 transitions, 1889 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:44:25,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 216 transitions, 2459 flow [2024-06-21 21:44:25,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 216 transitions, 2324 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:25,390 INFO L231 Difference]: Finished difference. Result has 170 places, 178 transitions, 1901 flow [2024-06-21 21:44:25,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1901, PETRI_PLACES=170, PETRI_TRANSITIONS=178} [2024-06-21 21:44:25,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-21 21:44:25,391 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 178 transitions, 1901 flow [2024-06-21 21:44:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:25,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:25,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:44:25,392 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:25,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1982025771, now seen corresponding path program 9 times [2024-06-21 21:44:25,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:25,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298767492] [2024-06-21 21:44:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:28,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:28,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298767492] [2024-06-21 21:44:28,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298767492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:28,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:28,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:28,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061960207] [2024-06-21 21:44:28,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:28,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:28,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:28,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:28,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 178 transitions, 1901 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:28,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:28,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:28,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:30,324 INFO L124 PetriNetUnfolderBase]: 2018/3347 cut-off events. [2024-06-21 21:44:30,325 INFO L125 PetriNetUnfolderBase]: For 117478/117495 co-relation queries the response was YES. [2024-06-21 21:44:30,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19994 conditions, 3347 events. 2018/3347 cut-off events. For 117478/117495 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19670 event pairs, 488 based on Foata normal form. 20/3361 useless extension candidates. Maximal degree in co-relation 19915. Up to 2794 conditions per place. [2024-06-21 21:44:30,349 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 57 changer transitions 0/217 dead transitions. [2024-06-21 21:44:30,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 217 transitions, 2475 flow [2024-06-21 21:44:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:44:30,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:44:30,351 INFO L175 Difference]: Start difference. First operand has 170 places, 178 transitions, 1901 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:44:30,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 217 transitions, 2475 flow [2024-06-21 21:44:30,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 217 transitions, 2346 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:30,511 INFO L231 Difference]: Finished difference. Result has 172 places, 179 transitions, 1923 flow [2024-06-21 21:44:30,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1923, PETRI_PLACES=172, PETRI_TRANSITIONS=179} [2024-06-21 21:44:30,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 21:44:30,512 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 179 transitions, 1923 flow [2024-06-21 21:44:30,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:30,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:30,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:44:30,513 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:30,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:30,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1982173641, now seen corresponding path program 10 times [2024-06-21 21:44:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:30,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588575700] [2024-06-21 21:44:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:30,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:33,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:33,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588575700] [2024-06-21 21:44:33,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588575700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:33,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:33,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:33,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483219866] [2024-06-21 21:44:33,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:33,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:33,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:33,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:33,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:33,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:33,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 179 transitions, 1923 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:33,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:33,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:33,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:35,233 INFO L124 PetriNetUnfolderBase]: 2038/3387 cut-off events. [2024-06-21 21:44:35,233 INFO L125 PetriNetUnfolderBase]: For 116677/116694 co-relation queries the response was YES. [2024-06-21 21:44:35,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20032 conditions, 3387 events. 2038/3387 cut-off events. For 116677/116694 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19938 event pairs, 478 based on Foata normal form. 16/3397 useless extension candidates. Maximal degree in co-relation 19952. Up to 2504 conditions per place. [2024-06-21 21:44:35,260 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 61 changer transitions 0/223 dead transitions. [2024-06-21 21:44:35,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 223 transitions, 2559 flow [2024-06-21 21:44:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:44:35,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:44:35,261 INFO L175 Difference]: Start difference. First operand has 172 places, 179 transitions, 1923 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:44:35,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 223 transitions, 2559 flow [2024-06-21 21:44:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 223 transitions, 2426 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:35,453 INFO L231 Difference]: Finished difference. Result has 175 places, 182 transitions, 1998 flow [2024-06-21 21:44:35,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1998, PETRI_PLACES=175, PETRI_TRANSITIONS=182} [2024-06-21 21:44:35,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 21:44:35,453 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 182 transitions, 1998 flow [2024-06-21 21:44:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:35,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:35,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:35,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:44:35,454 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:35,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash -500311797, now seen corresponding path program 2 times [2024-06-21 21:44:35,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:35,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261167145] [2024-06-21 21:44:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:35,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:38,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:38,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261167145] [2024-06-21 21:44:38,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261167145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:38,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:38,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609559487] [2024-06-21 21:44:38,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:38,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:38,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:38,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:38,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:38,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 182 transitions, 1998 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:38,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:38,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:38,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:40,043 INFO L124 PetriNetUnfolderBase]: 2086/3483 cut-off events. [2024-06-21 21:44:40,044 INFO L125 PetriNetUnfolderBase]: For 122649/122666 co-relation queries the response was YES. [2024-06-21 21:44:40,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20585 conditions, 3483 events. 2086/3483 cut-off events. For 122649/122666 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20797 event pairs, 498 based on Foata normal form. 16/3493 useless extension candidates. Maximal degree in co-relation 20503. Up to 2812 conditions per place. [2024-06-21 21:44:40,073 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 62 changer transitions 0/224 dead transitions. [2024-06-21 21:44:40,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 224 transitions, 2606 flow [2024-06-21 21:44:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:44:40,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:44:40,075 INFO L175 Difference]: Start difference. First operand has 175 places, 182 transitions, 1998 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:44:40,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 224 transitions, 2606 flow [2024-06-21 21:44:40,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 224 transitions, 2497 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:44:40,258 INFO L231 Difference]: Finished difference. Result has 179 places, 183 transitions, 2053 flow [2024-06-21 21:44:40,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1889, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2053, PETRI_PLACES=179, PETRI_TRANSITIONS=183} [2024-06-21 21:44:40,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-21 21:44:40,258 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 183 transitions, 2053 flow [2024-06-21 21:44:40,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:40,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:40,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:40,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:44:40,259 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:40,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1059217445, now seen corresponding path program 3 times [2024-06-21 21:44:40,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:40,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817908866] [2024-06-21 21:44:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:43,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:43,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817908866] [2024-06-21 21:44:43,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817908866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:43,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:43,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:43,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83331702] [2024-06-21 21:44:43,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:43,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:43,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:43,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:43,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:43,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:43,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 183 transitions, 2053 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:43,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:43,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:43,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:44,581 INFO L124 PetriNetUnfolderBase]: 2134/3579 cut-off events. [2024-06-21 21:44:44,581 INFO L125 PetriNetUnfolderBase]: For 128679/128696 co-relation queries the response was YES. [2024-06-21 21:44:44,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21266 conditions, 3579 events. 2134/3579 cut-off events. For 128679/128696 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21481 event pairs, 465 based on Foata normal form. 16/3589 useless extension candidates. Maximal degree in co-relation 21182. Up to 1964 conditions per place. [2024-06-21 21:44:44,608 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 148 selfloop transitions, 74 changer transitions 0/227 dead transitions. [2024-06-21 21:44:44,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 227 transitions, 2755 flow [2024-06-21 21:44:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:44:44,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:44:44,610 INFO L175 Difference]: Start difference. First operand has 179 places, 183 transitions, 2053 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:44:44,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 227 transitions, 2755 flow [2024-06-21 21:44:44,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 227 transitions, 2605 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 21:44:44,786 INFO L231 Difference]: Finished difference. Result has 181 places, 184 transitions, 2091 flow [2024-06-21 21:44:44,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2091, PETRI_PLACES=181, PETRI_TRANSITIONS=184} [2024-06-21 21:44:44,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 21:44:44,786 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 184 transitions, 2091 flow [2024-06-21 21:44:44,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:44,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:44,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:44,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:44:44,787 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:44,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:44,787 INFO L85 PathProgramCache]: Analyzing trace with hash 702326597, now seen corresponding path program 4 times [2024-06-21 21:44:44,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:44,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586174070] [2024-06-21 21:44:44,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:44,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:47,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:47,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586174070] [2024-06-21 21:44:47,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586174070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:47,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:47,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:44:47,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118204746] [2024-06-21 21:44:47,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:47,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:44:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:44:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:44:48,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:44:48,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 184 transitions, 2091 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:48,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:48,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:44:48,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:49,441 INFO L124 PetriNetUnfolderBase]: 2114/3547 cut-off events. [2024-06-21 21:44:49,441 INFO L125 PetriNetUnfolderBase]: For 123490/123507 co-relation queries the response was YES. [2024-06-21 21:44:49,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20708 conditions, 3547 events. 2114/3547 cut-off events. For 123490/123507 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21353 event pairs, 502 based on Foata normal form. 16/3557 useless extension candidates. Maximal degree in co-relation 20623. Up to 2752 conditions per place. [2024-06-21 21:44:49,473 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 160 selfloop transitions, 59 changer transitions 0/224 dead transitions. [2024-06-21 21:44:49,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 224 transitions, 2583 flow [2024-06-21 21:44:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:44:49,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:44:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:44:49,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:44:49,474 INFO L175 Difference]: Start difference. First operand has 181 places, 184 transitions, 2091 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:44:49,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 224 transitions, 2583 flow [2024-06-21 21:44:49,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 224 transitions, 2437 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:44:49,723 INFO L231 Difference]: Finished difference. Result has 183 places, 183 transitions, 1983 flow [2024-06-21 21:44:49,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1983, PETRI_PLACES=183, PETRI_TRANSITIONS=183} [2024-06-21 21:44:49,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 21:44:49,724 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 183 transitions, 1983 flow [2024-06-21 21:44:49,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:49,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:49,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:49,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:44:49,724 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:49,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2098984620, now seen corresponding path program 1 times [2024-06-21 21:44:49,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:49,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562572839] [2024-06-21 21:44:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:49,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:52,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:52,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562572839] [2024-06-21 21:44:52,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562572839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:52,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:52,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:44:52,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38478689] [2024-06-21 21:44:52,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:52,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:44:52,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:44:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:44:52,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:44:52,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 183 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:52,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:52,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:44:52,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:53,548 INFO L124 PetriNetUnfolderBase]: 2022/3430 cut-off events. [2024-06-21 21:44:53,548 INFO L125 PetriNetUnfolderBase]: For 123907/123941 co-relation queries the response was YES. [2024-06-21 21:44:53,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20316 conditions, 3430 events. 2022/3430 cut-off events. For 123907/123941 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21052 event pairs, 481 based on Foata normal form. 36/3431 useless extension candidates. Maximal degree in co-relation 20230. Up to 3049 conditions per place. [2024-06-21 21:44:53,576 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 155 selfloop transitions, 41 changer transitions 0/217 dead transitions. [2024-06-21 21:44:53,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 217 transitions, 2622 flow [2024-06-21 21:44:53,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:44:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:44:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:44:53,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:44:53,578 INFO L175 Difference]: Start difference. First operand has 183 places, 183 transitions, 1983 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:44:53,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 217 transitions, 2622 flow [2024-06-21 21:44:53,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 217 transitions, 2348 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-21 21:44:53,743 INFO L231 Difference]: Finished difference. Result has 180 places, 194 transitions, 1908 flow [2024-06-21 21:44:53,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1908, PETRI_PLACES=180, PETRI_TRANSITIONS=194} [2024-06-21 21:44:53,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 21:44:53,744 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 194 transitions, 1908 flow [2024-06-21 21:44:53,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:53,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:53,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:53,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:44:53,745 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:53,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash 200047706, now seen corresponding path program 2 times [2024-06-21 21:44:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:53,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777133449] [2024-06-21 21:44:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:53,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:44:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:44:56,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:44:56,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777133449] [2024-06-21 21:44:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777133449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:44:56,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:44:56,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:44:56,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104602678] [2024-06-21 21:44:56,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:44:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:44:56,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:44:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:44:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:44:56,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:44:56,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 194 transitions, 1908 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:56,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:44:56,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:44:56,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:44:57,449 INFO L124 PetriNetUnfolderBase]: 2009/3425 cut-off events. [2024-06-21 21:44:57,449 INFO L125 PetriNetUnfolderBase]: For 123424/123435 co-relation queries the response was YES. [2024-06-21 21:44:57,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19604 conditions, 3425 events. 2009/3425 cut-off events. For 123424/123435 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21146 event pairs, 482 based on Foata normal form. 13/3411 useless extension candidates. Maximal degree in co-relation 19520. Up to 3041 conditions per place. [2024-06-21 21:44:57,478 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 153 selfloop transitions, 39 changer transitions 0/213 dead transitions. [2024-06-21 21:44:57,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 213 transitions, 2344 flow [2024-06-21 21:44:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:44:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:44:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 21:44:57,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:44:57,479 INFO L175 Difference]: Start difference. First operand has 180 places, 194 transitions, 1908 flow. Second operand 6 states and 111 transitions. [2024-06-21 21:44:57,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 213 transitions, 2344 flow [2024-06-21 21:44:57,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 213 transitions, 2284 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-21 21:44:57,717 INFO L231 Difference]: Finished difference. Result has 184 places, 194 transitions, 1941 flow [2024-06-21 21:44:57,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1941, PETRI_PLACES=184, PETRI_TRANSITIONS=194} [2024-06-21 21:44:57,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 21:44:57,717 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 194 transitions, 1941 flow [2024-06-21 21:44:57,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:44:57,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:44:57,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:44:57,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:44:57,718 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:44:57,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:44:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash 194207306, now seen corresponding path program 3 times [2024-06-21 21:44:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:44:57,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983819213] [2024-06-21 21:44:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:44:57,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:44:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:00,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:00,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983819213] [2024-06-21 21:45:00,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983819213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:00,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:00,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:45:00,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415161351] [2024-06-21 21:45:00,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:00,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:45:00,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:00,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:45:00,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:45:00,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:45:00,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 194 transitions, 1941 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:00,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:00,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:45:00,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:01,432 INFO L124 PetriNetUnfolderBase]: 1996/3396 cut-off events. [2024-06-21 21:45:01,432 INFO L125 PetriNetUnfolderBase]: For 125069/125092 co-relation queries the response was YES. [2024-06-21 21:45:01,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19451 conditions, 3396 events. 1996/3396 cut-off events. For 125069/125092 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20934 event pairs, 486 based on Foata normal form. 23/3382 useless extension candidates. Maximal degree in co-relation 19365. Up to 3013 conditions per place. [2024-06-21 21:45:01,460 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 43 changer transitions 0/210 dead transitions. [2024-06-21 21:45:01,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 210 transitions, 2385 flow [2024-06-21 21:45:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:45:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:45:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:45:01,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:45:01,461 INFO L175 Difference]: Start difference. First operand has 184 places, 194 transitions, 1941 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:45:01,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 210 transitions, 2385 flow [2024-06-21 21:45:01,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 210 transitions, 2297 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:45:01,686 INFO L231 Difference]: Finished difference. Result has 184 places, 197 transitions, 1983 flow [2024-06-21 21:45:01,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1983, PETRI_PLACES=184, PETRI_TRANSITIONS=197} [2024-06-21 21:45:01,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 21:45:01,687 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 197 transitions, 1983 flow [2024-06-21 21:45:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:01,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:01,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:01,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:45:01,688 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:01,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash 695950786, now seen corresponding path program 1 times [2024-06-21 21:45:01,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:01,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853764377] [2024-06-21 21:45:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:01,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:03,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:03,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853764377] [2024-06-21 21:45:03,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853764377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:03,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:03,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:45:03,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365039882] [2024-06-21 21:45:03,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:03,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:45:03,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:45:03,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:45:03,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:03,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 197 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:03,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:03,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:03,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:05,333 INFO L124 PetriNetUnfolderBase]: 2157/3619 cut-off events. [2024-06-21 21:45:05,333 INFO L125 PetriNetUnfolderBase]: For 123240/123242 co-relation queries the response was YES. [2024-06-21 21:45:05,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20751 conditions, 3619 events. 2157/3619 cut-off events. For 123240/123242 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21972 event pairs, 514 based on Foata normal form. 1/3619 useless extension candidates. Maximal degree in co-relation 20665. Up to 3378 conditions per place. [2024-06-21 21:45:05,363 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 198 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-21 21:45:05,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 224 transitions, 2657 flow [2024-06-21 21:45:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:45:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:45:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:45:05,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:45:05,365 INFO L175 Difference]: Start difference. First operand has 184 places, 197 transitions, 1983 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:45:05,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 224 transitions, 2657 flow [2024-06-21 21:45:05,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 224 transitions, 2549 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 21:45:05,589 INFO L231 Difference]: Finished difference. Result has 187 places, 203 transitions, 2017 flow [2024-06-21 21:45:05,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1875, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2017, PETRI_PLACES=187, PETRI_TRANSITIONS=203} [2024-06-21 21:45:05,589 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 21:45:05,589 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 203 transitions, 2017 flow [2024-06-21 21:45:05,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:05,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:05,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:05,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:45:05,590 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:05,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash 696070756, now seen corresponding path program 2 times [2024-06-21 21:45:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:05,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914340785] [2024-06-21 21:45:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:05,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:07,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:07,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914340785] [2024-06-21 21:45:07,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914340785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:07,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:07,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:45:07,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968883264] [2024-06-21 21:45:07,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:07,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:45:07,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:07,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:45:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:45:08,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:08,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 203 transitions, 2017 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:08,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:08,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:08,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:09,293 INFO L124 PetriNetUnfolderBase]: 2167/3635 cut-off events. [2024-06-21 21:45:09,293 INFO L125 PetriNetUnfolderBase]: For 128905/128907 co-relation queries the response was YES. [2024-06-21 21:45:09,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21102 conditions, 3635 events. 2167/3635 cut-off events. For 128905/128907 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22070 event pairs, 514 based on Foata normal form. 1/3635 useless extension candidates. Maximal degree in co-relation 21015. Up to 3406 conditions per place. [2024-06-21 21:45:09,324 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 201 selfloop transitions, 19 changer transitions 0/225 dead transitions. [2024-06-21 21:45:09,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 225 transitions, 2579 flow [2024-06-21 21:45:09,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:45:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:45:09,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:45:09,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 21:45:09,325 INFO L175 Difference]: Start difference. First operand has 187 places, 203 transitions, 2017 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:45:09,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 225 transitions, 2579 flow [2024-06-21 21:45:09,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 225 transitions, 2511 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 21:45:09,568 INFO L231 Difference]: Finished difference. Result has 191 places, 209 transitions, 2077 flow [2024-06-21 21:45:09,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2077, PETRI_PLACES=191, PETRI_TRANSITIONS=209} [2024-06-21 21:45:09,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 21:45:09,569 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 209 transitions, 2077 flow [2024-06-21 21:45:09,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:09,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:09,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:09,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:45:09,569 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:09,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash 696070942, now seen corresponding path program 1 times [2024-06-21 21:45:09,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:09,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068760911] [2024-06-21 21:45:09,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:09,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:11,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:11,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068760911] [2024-06-21 21:45:11,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068760911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:11,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:11,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:45:11,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263794169] [2024-06-21 21:45:11,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:11,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:45:11,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:45:11,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:45:11,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:11,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 209 transitions, 2077 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:11,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:11,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:11,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:13,125 INFO L124 PetriNetUnfolderBase]: 2177/3649 cut-off events. [2024-06-21 21:45:13,125 INFO L125 PetriNetUnfolderBase]: For 135250/135252 co-relation queries the response was YES. [2024-06-21 21:45:13,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21307 conditions, 3649 events. 2177/3649 cut-off events. For 135250/135252 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22170 event pairs, 510 based on Foata normal form. 2/3650 useless extension candidates. Maximal degree in co-relation 21218. Up to 3398 conditions per place. [2024-06-21 21:45:13,155 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 23 changer transitions 0/235 dead transitions. [2024-06-21 21:45:13,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 235 transitions, 2759 flow [2024-06-21 21:45:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:45:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:45:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 21:45:13,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:45:13,157 INFO L175 Difference]: Start difference. First operand has 191 places, 209 transitions, 2077 flow. Second operand 7 states and 119 transitions. [2024-06-21 21:45:13,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 235 transitions, 2759 flow [2024-06-21 21:45:13,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 235 transitions, 2691 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 21:45:13,366 INFO L231 Difference]: Finished difference. Result has 194 places, 215 transitions, 2143 flow [2024-06-21 21:45:13,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2143, PETRI_PLACES=194, PETRI_TRANSITIONS=215} [2024-06-21 21:45:13,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 21:45:13,366 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 215 transitions, 2143 flow [2024-06-21 21:45:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:13,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:13,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:13,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:45:13,367 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:13,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 194213258, now seen corresponding path program 2 times [2024-06-21 21:45:13,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:13,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028312198] [2024-06-21 21:45:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:13,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:15,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:15,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028312198] [2024-06-21 21:45:15,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028312198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:15,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:15,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:45:15,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373822257] [2024-06-21 21:45:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:15,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:45:15,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:15,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:45:15,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:45:15,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:15,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 215 transitions, 2143 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:15,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:15,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:15,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:16,790 INFO L124 PetriNetUnfolderBase]: 2187/3664 cut-off events. [2024-06-21 21:45:16,790 INFO L125 PetriNetUnfolderBase]: For 141435/141439 co-relation queries the response was YES. [2024-06-21 21:45:16,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21688 conditions, 3664 events. 2187/3664 cut-off events. For 141435/141439 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22243 event pairs, 516 based on Foata normal form. 4/3667 useless extension candidates. Maximal degree in co-relation 21598. Up to 3408 conditions per place. [2024-06-21 21:45:16,822 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 202 selfloop transitions, 25 changer transitions 0/232 dead transitions. [2024-06-21 21:45:16,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 232 transitions, 2773 flow [2024-06-21 21:45:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:45:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:45:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 21:45:16,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 21:45:16,824 INFO L175 Difference]: Start difference. First operand has 194 places, 215 transitions, 2143 flow. Second operand 6 states and 101 transitions. [2024-06-21 21:45:16,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 232 transitions, 2773 flow [2024-06-21 21:45:17,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 232 transitions, 2719 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:45:17,032 INFO L231 Difference]: Finished difference. Result has 197 places, 218 transitions, 2189 flow [2024-06-21 21:45:17,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2189, PETRI_PLACES=197, PETRI_TRANSITIONS=218} [2024-06-21 21:45:17,033 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 21:45:17,033 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 218 transitions, 2189 flow [2024-06-21 21:45:17,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:17,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:17,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:17,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:45:17,033 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:17,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:17,034 INFO L85 PathProgramCache]: Analyzing trace with hash 193975922, now seen corresponding path program 3 times [2024-06-21 21:45:17,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:17,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098216352] [2024-06-21 21:45:17,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:17,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:19,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098216352] [2024-06-21 21:45:19,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098216352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:19,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:19,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:45:19,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871704345] [2024-06-21 21:45:19,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:19,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:45:19,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:45:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:45:19,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:19,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 218 transitions, 2189 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:19,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:19,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:19,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:20,553 INFO L124 PetriNetUnfolderBase]: 2184/3659 cut-off events. [2024-06-21 21:45:20,553 INFO L125 PetriNetUnfolderBase]: For 144055/144057 co-relation queries the response was YES. [2024-06-21 21:45:20,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21737 conditions, 3659 events. 2184/3659 cut-off events. For 144055/144057 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22188 event pairs, 515 based on Foata normal form. 1/3659 useless extension candidates. Maximal degree in co-relation 21645. Up to 3416 conditions per place. [2024-06-21 21:45:20,585 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 24 changer transitions 0/237 dead transitions. [2024-06-21 21:45:20,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 237 transitions, 2707 flow [2024-06-21 21:45:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:45:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:45:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:45:20,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:45:20,587 INFO L175 Difference]: Start difference. First operand has 197 places, 218 transitions, 2189 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:45:20,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 237 transitions, 2707 flow [2024-06-21 21:45:20,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 237 transitions, 2615 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 21:45:20,877 INFO L231 Difference]: Finished difference. Result has 200 places, 218 transitions, 2159 flow [2024-06-21 21:45:20,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2159, PETRI_PLACES=200, PETRI_TRANSITIONS=218} [2024-06-21 21:45:20,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 21:45:20,878 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 218 transitions, 2159 flow [2024-06-21 21:45:20,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:20,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:20,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:45:20,879 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:20,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash 193976108, now seen corresponding path program 3 times [2024-06-21 21:45:20,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:20,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668529155] [2024-06-21 21:45:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:20,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:23,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668529155] [2024-06-21 21:45:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668529155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:23,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:23,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:45:23,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472728529] [2024-06-21 21:45:23,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:23,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:45:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:23,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:45:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:45:23,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:23,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 218 transitions, 2159 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:23,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:23,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:23,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:24,447 INFO L124 PetriNetUnfolderBase]: 2178/3651 cut-off events. [2024-06-21 21:45:24,447 INFO L125 PetriNetUnfolderBase]: For 147861/147863 co-relation queries the response was YES. [2024-06-21 21:45:24,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21636 conditions, 3651 events. 2178/3651 cut-off events. For 147861/147863 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22142 event pairs, 510 based on Foata normal form. 2/3652 useless extension candidates. Maximal degree in co-relation 21543. Up to 3399 conditions per place. [2024-06-21 21:45:24,478 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 205 selfloop transitions, 26 changer transitions 0/236 dead transitions. [2024-06-21 21:45:24,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 236 transitions, 2669 flow [2024-06-21 21:45:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:45:24,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:45:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:45:24,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:45:24,480 INFO L175 Difference]: Start difference. First operand has 200 places, 218 transitions, 2159 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:45:24,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 236 transitions, 2669 flow [2024-06-21 21:45:24,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 236 transitions, 2597 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:45:24,813 INFO L231 Difference]: Finished difference. Result has 201 places, 218 transitions, 2149 flow [2024-06-21 21:45:24,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2149, PETRI_PLACES=201, PETRI_TRANSITIONS=218} [2024-06-21 21:45:24,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 21:45:24,814 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 218 transitions, 2149 flow [2024-06-21 21:45:24,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:24,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:24,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:24,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:45:24,815 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:24,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:24,815 INFO L85 PathProgramCache]: Analyzing trace with hash 194222186, now seen corresponding path program 1 times [2024-06-21 21:45:24,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:24,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254134096] [2024-06-21 21:45:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:24,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:28,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:28,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254134096] [2024-06-21 21:45:28,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254134096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:28,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:28,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:28,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744727789] [2024-06-21 21:45:28,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:28,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:28,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:28,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:28,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:28,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:45:28,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 218 transitions, 2149 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:28,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:28,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:45:28,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:29,349 INFO L124 PetriNetUnfolderBase]: 2018/3444 cut-off events. [2024-06-21 21:45:29,349 INFO L125 PetriNetUnfolderBase]: For 144464/144475 co-relation queries the response was YES. [2024-06-21 21:45:29,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20633 conditions, 3444 events. 2018/3444 cut-off events. For 144464/144475 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21292 event pairs, 477 based on Foata normal form. 11/3428 useless extension candidates. Maximal degree in co-relation 20539. Up to 3128 conditions per place. [2024-06-21 21:45:29,379 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 200 selfloop transitions, 12 changer transitions 0/233 dead transitions. [2024-06-21 21:45:29,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 233 transitions, 2637 flow [2024-06-21 21:45:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:45:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:45:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 21:45:29,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:45:29,381 INFO L175 Difference]: Start difference. First operand has 201 places, 218 transitions, 2149 flow. Second operand 6 states and 102 transitions. [2024-06-21 21:45:29,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 233 transitions, 2637 flow [2024-06-21 21:45:29,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 233 transitions, 2575 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:45:29,678 INFO L231 Difference]: Finished difference. Result has 201 places, 220 transitions, 2150 flow [2024-06-21 21:45:29,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2150, PETRI_PLACES=201, PETRI_TRANSITIONS=220} [2024-06-21 21:45:29,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-21 21:45:29,678 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 220 transitions, 2150 flow [2024-06-21 21:45:29,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:29,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:29,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:45:29,679 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:29,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -198311909, now seen corresponding path program 1 times [2024-06-21 21:45:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:29,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281937498] [2024-06-21 21:45:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:29,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:32,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:32,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281937498] [2024-06-21 21:45:32,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281937498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:32,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:32,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:32,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109004832] [2024-06-21 21:45:32,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:32,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:32,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:32,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:32,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 220 transitions, 2150 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:32,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:32,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:32,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:33,900 INFO L124 PetriNetUnfolderBase]: 2183/3662 cut-off events. [2024-06-21 21:45:33,900 INFO L125 PetriNetUnfolderBase]: For 145419/145421 co-relation queries the response was YES. [2024-06-21 21:45:33,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21617 conditions, 3662 events. 2183/3662 cut-off events. For 145419/145421 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22201 event pairs, 507 based on Foata normal form. 2/3663 useless extension candidates. Maximal degree in co-relation 21523. Up to 3357 conditions per place. [2024-06-21 21:45:33,934 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 40 changer transitions 0/252 dead transitions. [2024-06-21 21:45:33,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 252 transitions, 2892 flow [2024-06-21 21:45:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:33,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:45:33,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:45:33,936 INFO L175 Difference]: Start difference. First operand has 201 places, 220 transitions, 2150 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:45:33,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 252 transitions, 2892 flow [2024-06-21 21:45:34,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 252 transitions, 2845 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 21:45:34,199 INFO L231 Difference]: Finished difference. Result has 205 places, 226 transitions, 2275 flow [2024-06-21 21:45:34,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2275, PETRI_PLACES=205, PETRI_TRANSITIONS=226} [2024-06-21 21:45:34,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 21:45:34,199 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 226 transitions, 2275 flow [2024-06-21 21:45:34,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:34,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:34,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:34,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:45:34,200 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:34,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash 103364695, now seen corresponding path program 2 times [2024-06-21 21:45:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:34,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974035692] [2024-06-21 21:45:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:36,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:36,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974035692] [2024-06-21 21:45:36,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974035692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:36,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:36,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:36,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593360677] [2024-06-21 21:45:36,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:36,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:36,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:36,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:36,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:36,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 226 transitions, 2275 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:36,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:36,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:36,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:38,383 INFO L124 PetriNetUnfolderBase]: 2209/3702 cut-off events. [2024-06-21 21:45:38,384 INFO L125 PetriNetUnfolderBase]: For 155024/155026 co-relation queries the response was YES. [2024-06-21 21:45:38,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22416 conditions, 3702 events. 2209/3702 cut-off events. For 155024/155026 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22466 event pairs, 508 based on Foata normal form. 2/3703 useless extension candidates. Maximal degree in co-relation 22321. Up to 3422 conditions per place. [2024-06-21 21:45:38,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 35 changer transitions 0/257 dead transitions. [2024-06-21 21:45:38,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 257 transitions, 3035 flow [2024-06-21 21:45:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:45:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:45:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 21:45:38,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738095238095238 [2024-06-21 21:45:38,417 INFO L175 Difference]: Start difference. First operand has 205 places, 226 transitions, 2275 flow. Second operand 10 states and 157 transitions. [2024-06-21 21:45:38,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 257 transitions, 3035 flow [2024-06-21 21:45:38,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 257 transitions, 2951 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 21:45:38,712 INFO L231 Difference]: Finished difference. Result has 211 places, 232 transitions, 2365 flow [2024-06-21 21:45:38,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2365, PETRI_PLACES=211, PETRI_TRANSITIONS=232} [2024-06-21 21:45:38,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 21:45:38,713 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 232 transitions, 2365 flow [2024-06-21 21:45:38,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:38,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:38,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:38,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:45:38,714 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:38,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1453599963, now seen corresponding path program 3 times [2024-06-21 21:45:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:38,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591698353] [2024-06-21 21:45:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:38,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:41,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:41,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591698353] [2024-06-21 21:45:41,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591698353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:41,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:41,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:41,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450878751] [2024-06-21 21:45:41,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:41,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:41,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:41,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:41,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 232 transitions, 2365 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:41,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:41,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:41,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:42,547 INFO L124 PetriNetUnfolderBase]: 2203/3694 cut-off events. [2024-06-21 21:45:42,547 INFO L125 PetriNetUnfolderBase]: For 157733/157735 co-relation queries the response was YES. [2024-06-21 21:45:42,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22402 conditions, 3694 events. 2203/3694 cut-off events. For 157733/157735 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22446 event pairs, 507 based on Foata normal form. 2/3695 useless extension candidates. Maximal degree in co-relation 22305. Up to 3417 conditions per place. [2024-06-21 21:45:42,580 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 215 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-06-21 21:45:42,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 254 transitions, 2919 flow [2024-06-21 21:45:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:45:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:45:42,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:45:42,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 21:45:42,582 INFO L175 Difference]: Start difference. First operand has 211 places, 232 transitions, 2365 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:45:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 254 transitions, 2919 flow [2024-06-21 21:45:42,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 254 transitions, 2827 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:45:42,942 INFO L231 Difference]: Finished difference. Result has 213 places, 232 transitions, 2347 flow [2024-06-21 21:45:42,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2347, PETRI_PLACES=213, PETRI_TRANSITIONS=232} [2024-06-21 21:45:42,943 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-21 21:45:42,943 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 232 transitions, 2347 flow [2024-06-21 21:45:42,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:42,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:42,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:42,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:45:42,943 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:42,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1725645675, now seen corresponding path program 4 times [2024-06-21 21:45:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:42,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007496204] [2024-06-21 21:45:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:42,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:45,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:45,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007496204] [2024-06-21 21:45:45,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007496204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:45,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:45,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:45,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645720694] [2024-06-21 21:45:45,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:45,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:45,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:45,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:45,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:45,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:45,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 232 transitions, 2347 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:45,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:45,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:45,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:47,098 INFO L124 PetriNetUnfolderBase]: 2213/3713 cut-off events. [2024-06-21 21:45:47,098 INFO L125 PetriNetUnfolderBase]: For 163325/163329 co-relation queries the response was YES. [2024-06-21 21:45:47,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22609 conditions, 3713 events. 2213/3713 cut-off events. For 163325/163329 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22587 event pairs, 512 based on Foata normal form. 4/3716 useless extension candidates. Maximal degree in co-relation 22510. Up to 3396 conditions per place. [2024-06-21 21:45:47,133 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 207 selfloop transitions, 46 changer transitions 0/258 dead transitions. [2024-06-21 21:45:47,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 258 transitions, 3063 flow [2024-06-21 21:45:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:45:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:45:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 21:45:47,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:45:47,135 INFO L175 Difference]: Start difference. First operand has 213 places, 232 transitions, 2347 flow. Second operand 9 states and 144 transitions. [2024-06-21 21:45:47,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 258 transitions, 3063 flow [2024-06-21 21:45:47,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 258 transitions, 2995 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:45:47,436 INFO L231 Difference]: Finished difference. Result has 215 places, 235 transitions, 2423 flow [2024-06-21 21:45:47,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2423, PETRI_PLACES=215, PETRI_TRANSITIONS=235} [2024-06-21 21:45:47,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 21:45:47,437 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 235 transitions, 2423 flow [2024-06-21 21:45:47,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:47,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:47,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:47,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:45:47,437 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:47,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:47,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1718294025, now seen corresponding path program 5 times [2024-06-21 21:45:47,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:47,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331583301] [2024-06-21 21:45:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:47,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:49,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:49,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331583301] [2024-06-21 21:45:49,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331583301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:49,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:49,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:49,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522307233] [2024-06-21 21:45:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:49,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:49,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:49,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:49,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 235 transitions, 2423 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:49,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:49,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:49,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:51,552 INFO L124 PetriNetUnfolderBase]: 2223/3726 cut-off events. [2024-06-21 21:45:51,552 INFO L125 PetriNetUnfolderBase]: For 169022/169024 co-relation queries the response was YES. [2024-06-21 21:45:51,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22874 conditions, 3726 events. 2223/3726 cut-off events. For 169022/169024 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22623 event pairs, 508 based on Foata normal form. 2/3727 useless extension candidates. Maximal degree in co-relation 22774. Up to 3406 conditions per place. [2024-06-21 21:45:51,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 50 changer transitions 0/267 dead transitions. [2024-06-21 21:45:51,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 267 transitions, 3181 flow [2024-06-21 21:45:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:45:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:45:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 21:45:51,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 21:45:51,588 INFO L175 Difference]: Start difference. First operand has 215 places, 235 transitions, 2423 flow. Second operand 9 states and 152 transitions. [2024-06-21 21:45:51,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 267 transitions, 3181 flow [2024-06-21 21:45:51,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 267 transitions, 3025 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:45:52,000 INFO L231 Difference]: Finished difference. Result has 217 places, 238 transitions, 2429 flow [2024-06-21 21:45:52,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2429, PETRI_PLACES=217, PETRI_TRANSITIONS=238} [2024-06-21 21:45:52,001 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 21:45:52,001 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 238 transitions, 2429 flow [2024-06-21 21:45:52,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:52,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:52,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:52,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:45:52,002 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:52,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:52,002 INFO L85 PathProgramCache]: Analyzing trace with hash -59890869, now seen corresponding path program 6 times [2024-06-21 21:45:52,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:52,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344708874] [2024-06-21 21:45:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:52,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:54,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:54,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344708874] [2024-06-21 21:45:54,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344708874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:54,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:54,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101066522] [2024-06-21 21:45:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:54,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:54,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:54,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:54,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 238 transitions, 2429 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:54,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:54,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:54,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:45:55,833 INFO L124 PetriNetUnfolderBase]: 2217/3718 cut-off events. [2024-06-21 21:45:55,833 INFO L125 PetriNetUnfolderBase]: For 171139/171141 co-relation queries the response was YES. [2024-06-21 21:45:55,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22738 conditions, 3718 events. 2217/3718 cut-off events. For 171139/171141 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22575 event pairs, 507 based on Foata normal form. 2/3719 useless extension candidates. Maximal degree in co-relation 22637. Up to 3401 conditions per place. [2024-06-21 21:45:55,871 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 48 changer transitions 0/262 dead transitions. [2024-06-21 21:45:55,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 262 transitions, 3007 flow [2024-06-21 21:45:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:45:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:45:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:45:55,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 21:45:55,872 INFO L175 Difference]: Start difference. First operand has 217 places, 238 transitions, 2429 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:45:55,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 262 transitions, 3007 flow [2024-06-21 21:45:56,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 262 transitions, 2861 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 21:45:56,258 INFO L231 Difference]: Finished difference. Result has 216 places, 238 transitions, 2389 flow [2024-06-21 21:45:56,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2389, PETRI_PLACES=216, PETRI_TRANSITIONS=238} [2024-06-21 21:45:56,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 21:45:56,259 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 238 transitions, 2389 flow [2024-06-21 21:45:56,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:56,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:45:56,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:45:56,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:45:56,259 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:45:56,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:45:56,260 INFO L85 PathProgramCache]: Analyzing trace with hash -962372141, now seen corresponding path program 1 times [2024-06-21 21:45:56,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:45:56,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396718298] [2024-06-21 21:45:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:45:56,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:45:56,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:45:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:45:59,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:45:59,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396718298] [2024-06-21 21:45:59,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396718298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:45:59,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:45:59,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:45:59,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722685325] [2024-06-21 21:45:59,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:45:59,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:45:59,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:45:59,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:45:59,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:45:59,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:45:59,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 238 transitions, 2389 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:45:59,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:45:59,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:45:59,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:01,084 INFO L124 PetriNetUnfolderBase]: 2230/3740 cut-off events. [2024-06-21 21:46:01,084 INFO L125 PetriNetUnfolderBase]: For 171233/171239 co-relation queries the response was YES. [2024-06-21 21:46:01,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22877 conditions, 3740 events. 2230/3740 cut-off events. For 171233/171239 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22756 event pairs, 519 based on Foata normal form. 7/3745 useless extension candidates. Maximal degree in co-relation 22776. Up to 3345 conditions per place. [2024-06-21 21:46:01,120 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 57 changer transitions 0/279 dead transitions. [2024-06-21 21:46:01,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 279 transitions, 3401 flow [2024-06-21 21:46:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:46:01,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:46:01,121 INFO L175 Difference]: Start difference. First operand has 216 places, 238 transitions, 2389 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:46:01,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 279 transitions, 3401 flow [2024-06-21 21:46:01,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 279 transitions, 3295 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:01,527 INFO L231 Difference]: Finished difference. Result has 217 places, 247 transitions, 2563 flow [2024-06-21 21:46:01,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2563, PETRI_PLACES=217, PETRI_TRANSITIONS=247} [2024-06-21 21:46:01,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 21:46:01,528 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 247 transitions, 2563 flow [2024-06-21 21:46:01,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:01,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:01,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:01,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:46:01,529 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:01,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1683844461, now seen corresponding path program 1 times [2024-06-21 21:46:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:01,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67726523] [2024-06-21 21:46:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:01,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:04,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:04,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67726523] [2024-06-21 21:46:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67726523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:04,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:04,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904559751] [2024-06-21 21:46:04,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:04,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:04,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:04,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 247 transitions, 2563 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:04,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:04,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:04,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:06,214 INFO L124 PetriNetUnfolderBase]: 2277/3806 cut-off events. [2024-06-21 21:46:06,214 INFO L125 PetriNetUnfolderBase]: For 181197/181205 co-relation queries the response was YES. [2024-06-21 21:46:06,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23850 conditions, 3806 events. 2277/3806 cut-off events. For 181197/181205 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23113 event pairs, 513 based on Foata normal form. 10/3815 useless extension candidates. Maximal degree in co-relation 23749. Up to 3437 conditions per place. [2024-06-21 21:46:06,252 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 52 changer transitions 0/296 dead transitions. [2024-06-21 21:46:06,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 296 transitions, 3638 flow [2024-06-21 21:46:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:46:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:46:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 21:46:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-21 21:46:06,254 INFO L175 Difference]: Start difference. First operand has 217 places, 247 transitions, 2563 flow. Second operand 10 states and 166 transitions. [2024-06-21 21:46:06,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 296 transitions, 3638 flow [2024-06-21 21:46:06,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 296 transitions, 3539 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 21:46:06,757 INFO L231 Difference]: Finished difference. Result has 225 places, 263 transitions, 2780 flow [2024-06-21 21:46:06,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2780, PETRI_PLACES=225, PETRI_TRANSITIONS=263} [2024-06-21 21:46:06,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 21:46:06,758 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 263 transitions, 2780 flow [2024-06-21 21:46:06,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:06,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:06,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:06,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:46:06,758 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:06,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:06,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1683844275, now seen corresponding path program 2 times [2024-06-21 21:46:06,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:06,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079658421] [2024-06-21 21:46:06,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:06,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:10,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:10,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079658421] [2024-06-21 21:46:10,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079658421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:10,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:10,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:10,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123819972] [2024-06-21 21:46:10,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:10,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:10,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:10,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:10,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:10,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 263 transitions, 2780 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:10,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:10,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:10,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:11,996 INFO L124 PetriNetUnfolderBase]: 2282/3815 cut-off events. [2024-06-21 21:46:11,996 INFO L125 PetriNetUnfolderBase]: For 186940/186948 co-relation queries the response was YES. [2024-06-21 21:46:12,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24345 conditions, 3815 events. 2282/3815 cut-off events. For 186940/186948 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23213 event pairs, 516 based on Foata normal form. 9/3823 useless extension candidates. Maximal degree in co-relation 24241. Up to 3487 conditions per place. [2024-06-21 21:46:12,031 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 42 changer transitions 0/292 dead transitions. [2024-06-21 21:46:12,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 292 transitions, 3474 flow [2024-06-21 21:46:12,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:46:12,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:46:12,032 INFO L175 Difference]: Start difference. First operand has 225 places, 263 transitions, 2780 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:46:12,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 292 transitions, 3474 flow [2024-06-21 21:46:12,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 292 transitions, 3341 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 21:46:12,418 INFO L231 Difference]: Finished difference. Result has 229 places, 266 transitions, 2785 flow [2024-06-21 21:46:12,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2785, PETRI_PLACES=229, PETRI_TRANSITIONS=266} [2024-06-21 21:46:12,419 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 21:46:12,419 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 266 transitions, 2785 flow [2024-06-21 21:46:12,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:12,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:12,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:46:12,420 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:12,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1861213131, now seen corresponding path program 2 times [2024-06-21 21:46:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207236862] [2024-06-21 21:46:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:15,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:15,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207236862] [2024-06-21 21:46:15,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207236862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:15,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:15,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:15,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707630006] [2024-06-21 21:46:15,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:15,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:15,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:15,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:15,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 266 transitions, 2785 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:15,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:15,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:15,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:16,959 INFO L124 PetriNetUnfolderBase]: 2334/3887 cut-off events. [2024-06-21 21:46:16,959 INFO L125 PetriNetUnfolderBase]: For 200666/200674 co-relation queries the response was YES. [2024-06-21 21:46:16,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24972 conditions, 3887 events. 2334/3887 cut-off events. For 200666/200674 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23591 event pairs, 515 based on Foata normal form. 10/3896 useless extension candidates. Maximal degree in co-relation 24866. Up to 3492 conditions per place. [2024-06-21 21:46:16,993 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 64 changer transitions 0/310 dead transitions. [2024-06-21 21:46:16,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 310 transitions, 3876 flow [2024-06-21 21:46:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:46:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:46:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:46:16,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:46:16,995 INFO L175 Difference]: Start difference. First operand has 229 places, 266 transitions, 2785 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:46:16,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 310 transitions, 3876 flow [2024-06-21 21:46:17,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 310 transitions, 3752 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:17,254 INFO L231 Difference]: Finished difference. Result has 232 places, 282 transitions, 2970 flow [2024-06-21 21:46:17,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2675, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2970, PETRI_PLACES=232, PETRI_TRANSITIONS=282} [2024-06-21 21:46:17,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-21 21:46:17,255 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 282 transitions, 2970 flow [2024-06-21 21:46:17,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:17,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:17,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:17,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:46:17,256 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:17,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash -785120465, now seen corresponding path program 3 times [2024-06-21 21:46:17,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:17,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374253528] [2024-06-21 21:46:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:17,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:20,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:20,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374253528] [2024-06-21 21:46:20,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374253528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:20,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:20,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:20,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803148245] [2024-06-21 21:46:20,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:20,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:20,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:20,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:20,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:20,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:20,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 282 transitions, 2970 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:20,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:20,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:20,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:21,860 INFO L124 PetriNetUnfolderBase]: 2328/3881 cut-off events. [2024-06-21 21:46:21,860 INFO L125 PetriNetUnfolderBase]: For 203657/203665 co-relation queries the response was YES. [2024-06-21 21:46:21,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24990 conditions, 3881 events. 2328/3881 cut-off events. For 203657/203665 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23600 event pairs, 516 based on Foata normal form. 10/3890 useless extension candidates. Maximal degree in co-relation 24883. Up to 3487 conditions per place. [2024-06-21 21:46:21,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 66 changer transitions 0/313 dead transitions. [2024-06-21 21:46:21,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 313 transitions, 3902 flow [2024-06-21 21:46:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:46:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:46:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 21:46:21,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:46:21,898 INFO L175 Difference]: Start difference. First operand has 232 places, 282 transitions, 2970 flow. Second operand 11 states and 176 transitions. [2024-06-21 21:46:21,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 313 transitions, 3902 flow [2024-06-21 21:46:22,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 313 transitions, 3820 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 21:46:22,363 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3026 flow [2024-06-21 21:46:22,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3026, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-21 21:46:22,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 21:46:22,363 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3026 flow [2024-06-21 21:46:22,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:22,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:22,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:22,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:46:22,364 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:22,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1645732581, now seen corresponding path program 3 times [2024-06-21 21:46:22,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:22,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476998477] [2024-06-21 21:46:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:22,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:25,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:25,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476998477] [2024-06-21 21:46:25,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476998477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:25,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:25,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:25,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440538222] [2024-06-21 21:46:25,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:25,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:25,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:25,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:25,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3026 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:25,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:25,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:25,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:27,472 INFO L124 PetriNetUnfolderBase]: 2341/3905 cut-off events. [2024-06-21 21:46:27,472 INFO L125 PetriNetUnfolderBase]: For 210616/210624 co-relation queries the response was YES. [2024-06-21 21:46:27,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25339 conditions, 3905 events. 2341/3905 cut-off events. For 210616/210624 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23771 event pairs, 520 based on Foata normal form. 9/3913 useless extension candidates. Maximal degree in co-relation 25231. Up to 3560 conditions per place. [2024-06-21 21:46:27,511 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 54 changer transitions 0/312 dead transitions. [2024-06-21 21:46:27,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 312 transitions, 3926 flow [2024-06-21 21:46:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:46:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:46:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:46:27,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 21:46:27,513 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3026 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:46:27,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 312 transitions, 3926 flow [2024-06-21 21:46:27,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 312 transitions, 3772 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 21:46:27,892 INFO L231 Difference]: Finished difference. Result has 242 places, 288 transitions, 3104 flow [2024-06-21 21:46:27,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3104, PETRI_PLACES=242, PETRI_TRANSITIONS=288} [2024-06-21 21:46:27,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-21 21:46:27,893 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 288 transitions, 3104 flow [2024-06-21 21:46:27,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:27,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:27,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:27,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:46:27,893 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:27,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash -784874387, now seen corresponding path program 1 times [2024-06-21 21:46:27,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:27,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792925919] [2024-06-21 21:46:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:27,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:31,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792925919] [2024-06-21 21:46:31,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792925919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:31,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:31,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:46:31,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170019752] [2024-06-21 21:46:31,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:31,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:46:31,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:46:31,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:46:31,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:46:31,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 288 transitions, 3104 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:31,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:31,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:46:31,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:33,476 INFO L124 PetriNetUnfolderBase]: 2232/3767 cut-off events. [2024-06-21 21:46:33,476 INFO L125 PetriNetUnfolderBase]: For 236619/236632 co-relation queries the response was YES. [2024-06-21 21:46:33,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24842 conditions, 3767 events. 2232/3767 cut-off events. For 236619/236632 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23297 event pairs, 484 based on Foata normal form. 21/3757 useless extension candidates. Maximal degree in co-relation 24732. Up to 3259 conditions per place. [2024-06-21 21:46:33,516 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 234 selfloop transitions, 46 changer transitions 0/317 dead transitions. [2024-06-21 21:46:33,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 317 transitions, 3776 flow [2024-06-21 21:46:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:46:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:46:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:46:33,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 21:46:33,522 INFO L175 Difference]: Start difference. First operand has 242 places, 288 transitions, 3104 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:46:33,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 317 transitions, 3776 flow [2024-06-21 21:46:34,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 317 transitions, 3628 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:46:34,065 INFO L231 Difference]: Finished difference. Result has 245 places, 289 transitions, 3072 flow [2024-06-21 21:46:34,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2956, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3072, PETRI_PLACES=245, PETRI_TRANSITIONS=289} [2024-06-21 21:46:34,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 21:46:34,066 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 289 transitions, 3072 flow [2024-06-21 21:46:34,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:34,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:34,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:34,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:46:34,066 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:34,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1217565439, now seen corresponding path program 4 times [2024-06-21 21:46:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:34,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951763539] [2024-06-21 21:46:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:37,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:37,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951763539] [2024-06-21 21:46:37,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951763539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:37,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:37,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:37,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710879178] [2024-06-21 21:46:37,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:37,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:37,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:37,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:37,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:37,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 289 transitions, 3072 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:37,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:37,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:37,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:38,823 INFO L124 PetriNetUnfolderBase]: 2398/3988 cut-off events. [2024-06-21 21:46:38,823 INFO L125 PetriNetUnfolderBase]: For 227360/227379 co-relation queries the response was YES. [2024-06-21 21:46:38,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26131 conditions, 3988 events. 2398/3988 cut-off events. For 227360/227379 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24230 event pairs, 527 based on Foata normal form. 15/4000 useless extension candidates. Maximal degree in co-relation 26020. Up to 3569 conditions per place. [2024-06-21 21:46:38,865 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 84 changer transitions 0/324 dead transitions. [2024-06-21 21:46:38,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 324 transitions, 4152 flow [2024-06-21 21:46:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:46:38,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:46:38,867 INFO L175 Difference]: Start difference. First operand has 245 places, 289 transitions, 3072 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:46:38,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 324 transitions, 4152 flow [2024-06-21 21:46:39,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 324 transitions, 4058 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:46:39,457 INFO L231 Difference]: Finished difference. Result has 246 places, 295 transitions, 3264 flow [2024-06-21 21:46:39,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3264, PETRI_PLACES=246, PETRI_TRANSITIONS=295} [2024-06-21 21:46:39,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-21 21:46:39,458 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 295 transitions, 3264 flow [2024-06-21 21:46:39,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:39,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:39,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:39,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:46:39,459 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:39,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:39,460 INFO L85 PathProgramCache]: Analyzing trace with hash -86798195, now seen corresponding path program 5 times [2024-06-21 21:46:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:39,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198449167] [2024-06-21 21:46:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:42,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:42,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198449167] [2024-06-21 21:46:42,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198449167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:42,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:42,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:42,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673532056] [2024-06-21 21:46:42,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:42,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:42,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:42,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:42,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:42,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:42,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 295 transitions, 3264 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:42,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:42,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:44,049 INFO L124 PetriNetUnfolderBase]: 2411/4012 cut-off events. [2024-06-21 21:46:44,049 INFO L125 PetriNetUnfolderBase]: For 236034/236053 co-relation queries the response was YES. [2024-06-21 21:46:44,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26503 conditions, 4012 events. 2411/4012 cut-off events. For 236034/236053 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24485 event pairs, 529 based on Foata normal form. 15/4024 useless extension candidates. Maximal degree in co-relation 26391. Up to 3584 conditions per place. [2024-06-21 21:46:44,089 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 90 changer transitions 0/326 dead transitions. [2024-06-21 21:46:44,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 326 transitions, 4352 flow [2024-06-21 21:46:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:46:44,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:46:44,090 INFO L175 Difference]: Start difference. First operand has 246 places, 295 transitions, 3264 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:46:44,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 326 transitions, 4352 flow [2024-06-21 21:46:44,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 326 transitions, 4147 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 21:46:44,534 INFO L231 Difference]: Finished difference. Result has 250 places, 301 transitions, 3369 flow [2024-06-21 21:46:44,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3369, PETRI_PLACES=250, PETRI_TRANSITIONS=301} [2024-06-21 21:46:44,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 21:46:44,535 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 301 transitions, 3369 flow [2024-06-21 21:46:44,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:44,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:44,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:44,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:46:44,535 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:44,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1358981369, now seen corresponding path program 6 times [2024-06-21 21:46:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:44,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754603464] [2024-06-21 21:46:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:44,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:47,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:47,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754603464] [2024-06-21 21:46:47,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754603464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:47,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:47,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:47,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651716134] [2024-06-21 21:46:47,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:47,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:47,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:47,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:47,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:47,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:47,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 301 transitions, 3369 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:47,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:47,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:47,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:49,507 INFO L124 PetriNetUnfolderBase]: 2408/4008 cut-off events. [2024-06-21 21:46:49,507 INFO L125 PetriNetUnfolderBase]: For 240657/240676 co-relation queries the response was YES. [2024-06-21 21:46:49,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26466 conditions, 4008 events. 2408/4008 cut-off events. For 240657/240676 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24425 event pairs, 537 based on Foata normal form. 15/4020 useless extension candidates. Maximal degree in co-relation 26353. Up to 3581 conditions per place. [2024-06-21 21:46:49,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 86 changer transitions 0/331 dead transitions. [2024-06-21 21:46:49,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 331 transitions, 4487 flow [2024-06-21 21:46:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 21:46:49,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 21:46:49,553 INFO L175 Difference]: Start difference. First operand has 250 places, 301 transitions, 3369 flow. Second operand 8 states and 142 transitions. [2024-06-21 21:46:49,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 331 transitions, 4487 flow [2024-06-21 21:46:50,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 331 transitions, 4304 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 21:46:50,202 INFO L231 Difference]: Finished difference. Result has 254 places, 301 transitions, 3364 flow [2024-06-21 21:46:50,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3364, PETRI_PLACES=254, PETRI_TRANSITIONS=301} [2024-06-21 21:46:50,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 21:46:50,203 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 301 transitions, 3364 flow [2024-06-21 21:46:50,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:50,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:50,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:50,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:46:50,203 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:50,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1757414005, now seen corresponding path program 7 times [2024-06-21 21:46:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:50,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46431131] [2024-06-21 21:46:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:50,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:53,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:53,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46431131] [2024-06-21 21:46:53,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46431131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:53,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:53,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:53,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10078966] [2024-06-21 21:46:53,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:53,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:53,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:53,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:53,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 301 transitions, 3364 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:53,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:53,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:53,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:46:54,825 INFO L124 PetriNetUnfolderBase]: 2405/4004 cut-off events. [2024-06-21 21:46:54,825 INFO L125 PetriNetUnfolderBase]: For 245812/245831 co-relation queries the response was YES. [2024-06-21 21:46:54,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26460 conditions, 4004 events. 2405/4004 cut-off events. For 245812/245831 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24408 event pairs, 535 based on Foata normal form. 15/4016 useless extension candidates. Maximal degree in co-relation 26346. Up to 3663 conditions per place. [2024-06-21 21:46:54,864 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 270 selfloop transitions, 49 changer transitions 0/324 dead transitions. [2024-06-21 21:46:54,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 324 transitions, 4072 flow [2024-06-21 21:46:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:46:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:46:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 21:46:54,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:46:54,865 INFO L175 Difference]: Start difference. First operand has 254 places, 301 transitions, 3364 flow. Second operand 8 states and 132 transitions. [2024-06-21 21:46:54,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 324 transitions, 4072 flow [2024-06-21 21:46:55,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 324 transitions, 3783 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:46:55,499 INFO L231 Difference]: Finished difference. Result has 254 places, 301 transitions, 3179 flow [2024-06-21 21:46:55,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3179, PETRI_PLACES=254, PETRI_TRANSITIONS=301} [2024-06-21 21:46:55,500 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 21:46:55,500 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 301 transitions, 3179 flow [2024-06-21 21:46:55,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:55,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:46:55,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:46:55,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:46:55,501 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:46:55,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:46:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1757414191, now seen corresponding path program 4 times [2024-06-21 21:46:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:46:55,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467754190] [2024-06-21 21:46:55,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:46:55,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:46:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:46:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:46:58,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:46:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467754190] [2024-06-21 21:46:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467754190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:46:58,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:46:58,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:46:58,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634975977] [2024-06-21 21:46:58,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:46:58,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:46:58,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:46:58,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:46:58,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:46:58,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:46:58,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 301 transitions, 3179 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:46:58,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:46:58,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:46:58,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:00,038 INFO L124 PetriNetUnfolderBase]: 2399/3996 cut-off events. [2024-06-21 21:47:00,038 INFO L125 PetriNetUnfolderBase]: For 249595/249614 co-relation queries the response was YES. [2024-06-21 21:47:00,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26215 conditions, 3996 events. 2399/3996 cut-off events. For 249595/249614 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24364 event pairs, 530 based on Foata normal form. 16/4009 useless extension candidates. Maximal degree in co-relation 26100. Up to 3643 conditions per place. [2024-06-21 21:47:00,080 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 52 changer transitions 0/330 dead transitions. [2024-06-21 21:47:00,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 330 transitions, 4057 flow [2024-06-21 21:47:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:47:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:47:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:47:00,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:47:00,081 INFO L175 Difference]: Start difference. First operand has 254 places, 301 transitions, 3179 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:47:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 330 transitions, 4057 flow [2024-06-21 21:47:00,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 330 transitions, 3937 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 21:47:00,608 INFO L231 Difference]: Finished difference. Result has 258 places, 303 transitions, 3197 flow [2024-06-21 21:47:00,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3063, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3197, PETRI_PLACES=258, PETRI_TRANSITIONS=303} [2024-06-21 21:47:00,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 21:47:00,608 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 303 transitions, 3197 flow [2024-06-21 21:47:00,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:00,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:00,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:00,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:47:00,609 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:00,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2112092941, now seen corresponding path program 5 times [2024-06-21 21:47:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:00,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578219264] [2024-06-21 21:47:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:00,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:03,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:03,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578219264] [2024-06-21 21:47:03,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578219264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:03,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:03,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:03,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221494708] [2024-06-21 21:47:03,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:03,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:03,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:03,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:03,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 303 transitions, 3197 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:03,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:03,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:03,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:05,159 INFO L124 PetriNetUnfolderBase]: 2430/4037 cut-off events. [2024-06-21 21:47:05,159 INFO L125 PetriNetUnfolderBase]: For 261369/261388 co-relation queries the response was YES. [2024-06-21 21:47:05,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26782 conditions, 4037 events. 2430/4037 cut-off events. For 261369/261388 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24562 event pairs, 522 based on Foata normal form. 16/4050 useless extension candidates. Maximal degree in co-relation 26665. Up to 3568 conditions per place. [2024-06-21 21:47:05,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 85 changer transitions 0/343 dead transitions. [2024-06-21 21:47:05,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 343 transitions, 4418 flow [2024-06-21 21:47:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:47:05,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:47:05,206 INFO L175 Difference]: Start difference. First operand has 258 places, 303 transitions, 3197 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:47:05,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 343 transitions, 4418 flow [2024-06-21 21:47:05,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 343 transitions, 4308 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:47:05,675 INFO L231 Difference]: Finished difference. Result has 262 places, 318 transitions, 3524 flow [2024-06-21 21:47:05,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3524, PETRI_PLACES=262, PETRI_TRANSITIONS=318} [2024-06-21 21:47:05,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 21:47:05,675 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 318 transitions, 3524 flow [2024-06-21 21:47:05,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:05,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:05,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:05,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:47:05,676 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:05,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2111914195, now seen corresponding path program 8 times [2024-06-21 21:47:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:05,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422990374] [2024-06-21 21:47:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:08,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:08,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422990374] [2024-06-21 21:47:08,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422990374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:08,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:08,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:08,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830690330] [2024-06-21 21:47:08,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:08,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:08,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:08,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:08,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:08,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 318 transitions, 3524 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:08,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:08,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:08,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:10,129 INFO L124 PetriNetUnfolderBase]: 2443/4055 cut-off events. [2024-06-21 21:47:10,129 INFO L125 PetriNetUnfolderBase]: For 270507/270526 co-relation queries the response was YES. [2024-06-21 21:47:10,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27494 conditions, 4055 events. 2443/4055 cut-off events. For 270507/270526 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24676 event pairs, 529 based on Foata normal form. 15/4067 useless extension candidates. Maximal degree in co-relation 27374. Up to 3702 conditions per place. [2024-06-21 21:47:10,166 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 63 changer transitions 0/344 dead transitions. [2024-06-21 21:47:10,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 344 transitions, 4492 flow [2024-06-21 21:47:10,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:47:10,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:47:10,167 INFO L175 Difference]: Start difference. First operand has 262 places, 318 transitions, 3524 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:47:10,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 344 transitions, 4492 flow [2024-06-21 21:47:10,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 344 transitions, 4412 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 21:47:10,850 INFO L231 Difference]: Finished difference. Result has 269 places, 324 transitions, 3700 flow [2024-06-21 21:47:10,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3700, PETRI_PLACES=269, PETRI_TRANSITIONS=324} [2024-06-21 21:47:10,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-21 21:47:10,851 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 324 transitions, 3700 flow [2024-06-21 21:47:10,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:10,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:10,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:10,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:47:10,851 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:10,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:10,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1767590995, now seen corresponding path program 9 times [2024-06-21 21:47:10,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:10,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689602625] [2024-06-21 21:47:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:10,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:13,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:13,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689602625] [2024-06-21 21:47:13,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689602625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:13,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:13,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:13,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387848270] [2024-06-21 21:47:13,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:13,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:13,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:13,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:13,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:13,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:13,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 324 transitions, 3700 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:13,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:13,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:13,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:15,382 INFO L124 PetriNetUnfolderBase]: 2440/4051 cut-off events. [2024-06-21 21:47:15,382 INFO L125 PetriNetUnfolderBase]: For 274852/274871 co-relation queries the response was YES. [2024-06-21 21:47:15,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27417 conditions, 4051 events. 2440/4051 cut-off events. For 274852/274871 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24684 event pairs, 529 based on Foata normal form. 15/4063 useless extension candidates. Maximal degree in co-relation 27294. Up to 3699 conditions per place. [2024-06-21 21:47:15,427 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 64 changer transitions 0/345 dead transitions. [2024-06-21 21:47:15,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 345 transitions, 4442 flow [2024-06-21 21:47:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:47:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:47:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 21:47:15,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-21 21:47:15,429 INFO L175 Difference]: Start difference. First operand has 269 places, 324 transitions, 3700 flow. Second operand 10 states and 153 transitions. [2024-06-21 21:47:15,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 345 transitions, 4442 flow [2024-06-21 21:47:16,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 345 transitions, 4280 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 21:47:16,053 INFO L231 Difference]: Finished difference. Result has 274 places, 324 transitions, 3672 flow [2024-06-21 21:47:16,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3672, PETRI_PLACES=274, PETRI_TRANSITIONS=324} [2024-06-21 21:47:16,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 21:47:16,054 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 324 transitions, 3672 flow [2024-06-21 21:47:16,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:16,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:16,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:16,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:47:16,054 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:16,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1091083393, now seen corresponding path program 6 times [2024-06-21 21:47:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:16,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282235125] [2024-06-21 21:47:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:16,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:18,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282235125] [2024-06-21 21:47:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282235125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:18,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:18,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377237578] [2024-06-21 21:47:18,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:18,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:18,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:18,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 324 transitions, 3672 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:18,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:18,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:18,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:20,466 INFO L124 PetriNetUnfolderBase]: 2434/4047 cut-off events. [2024-06-21 21:47:20,467 INFO L125 PetriNetUnfolderBase]: For 279579/279598 co-relation queries the response was YES. [2024-06-21 21:47:20,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27299 conditions, 4047 events. 2434/4047 cut-off events. For 279579/279598 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24704 event pairs, 532 based on Foata normal form. 16/4060 useless extension candidates. Maximal degree in co-relation 27176. Up to 3700 conditions per place. [2024-06-21 21:47:20,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 52 changer transitions 0/344 dead transitions. [2024-06-21 21:47:20,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 344 transitions, 4410 flow [2024-06-21 21:47:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:47:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:47:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 21:47:20,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 21:47:20,512 INFO L175 Difference]: Start difference. First operand has 274 places, 324 transitions, 3672 flow. Second operand 8 states and 129 transitions. [2024-06-21 21:47:20,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 344 transitions, 4410 flow [2024-06-21 21:47:21,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 344 transitions, 4230 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 21:47:21,226 INFO L231 Difference]: Finished difference. Result has 272 places, 324 transitions, 3602 flow [2024-06-21 21:47:21,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3602, PETRI_PLACES=272, PETRI_TRANSITIONS=324} [2024-06-21 21:47:21,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 21:47:21,226 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 324 transitions, 3602 flow [2024-06-21 21:47:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:21,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:21,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:21,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:47:21,227 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:21,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1955402441, now seen corresponding path program 7 times [2024-06-21 21:47:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:21,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239111955] [2024-06-21 21:47:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:21,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:24,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:24,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239111955] [2024-06-21 21:47:24,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239111955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:24,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:24,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:24,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564169086] [2024-06-21 21:47:24,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:24,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:24,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:24,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:24,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 324 transitions, 3602 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:24,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:24,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:24,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:25,780 INFO L124 PetriNetUnfolderBase]: 2476/4106 cut-off events. [2024-06-21 21:47:25,781 INFO L125 PetriNetUnfolderBase]: For 298621/298654 co-relation queries the response was YES. [2024-06-21 21:47:25,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28010 conditions, 4106 events. 2476/4106 cut-off events. For 298621/298654 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25005 event pairs, 539 based on Foata normal form. 24/4127 useless extension candidates. Maximal degree in co-relation 27887. Up to 3617 conditions per place. [2024-06-21 21:47:25,820 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 92 changer transitions 0/352 dead transitions. [2024-06-21 21:47:25,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 352 transitions, 4771 flow [2024-06-21 21:47:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:47:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:47:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:47:25,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 21:47:25,822 INFO L175 Difference]: Start difference. First operand has 272 places, 324 transitions, 3602 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:47:25,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 352 transitions, 4771 flow [2024-06-21 21:47:26,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 352 transitions, 4655 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:47:26,338 INFO L231 Difference]: Finished difference. Result has 272 places, 333 transitions, 3817 flow [2024-06-21 21:47:26,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3817, PETRI_PLACES=272, PETRI_TRANSITIONS=333} [2024-06-21 21:47:26,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 21:47:26,339 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 333 transitions, 3817 flow [2024-06-21 21:47:26,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:26,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:26,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:26,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:47:26,340 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:26,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1949688521, now seen corresponding path program 8 times [2024-06-21 21:47:26,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:26,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977578286] [2024-06-21 21:47:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:26,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:29,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:29,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977578286] [2024-06-21 21:47:29,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977578286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:29,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:29,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:29,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889666172] [2024-06-21 21:47:29,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:29,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:29,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:29,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:29,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 333 transitions, 3817 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:29,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:29,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:29,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:31,077 INFO L124 PetriNetUnfolderBase]: 2470/4098 cut-off events. [2024-06-21 21:47:31,077 INFO L125 PetriNetUnfolderBase]: For 301716/301749 co-relation queries the response was YES. [2024-06-21 21:47:31,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28083 conditions, 4098 events. 2470/4098 cut-off events. For 301716/301749 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24984 event pairs, 539 based on Foata normal form. 24/4119 useless extension candidates. Maximal degree in co-relation 27959. Up to 3612 conditions per place. [2024-06-21 21:47:31,122 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 255 selfloop transitions, 92 changer transitions 0/352 dead transitions. [2024-06-21 21:47:31,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 352 transitions, 4849 flow [2024-06-21 21:47:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:47:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:47:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:47:31,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 21:47:31,124 INFO L175 Difference]: Start difference. First operand has 272 places, 333 transitions, 3817 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:47:31,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 352 transitions, 4849 flow [2024-06-21 21:47:31,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 352 transitions, 4664 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 21:47:31,843 INFO L231 Difference]: Finished difference. Result has 276 places, 333 transitions, 3822 flow [2024-06-21 21:47:31,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3822, PETRI_PLACES=276, PETRI_TRANSITIONS=333} [2024-06-21 21:47:31,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 21:47:31,844 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 333 transitions, 3822 flow [2024-06-21 21:47:31,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:31,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:31,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:31,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:47:31,845 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:31,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 7552583, now seen corresponding path program 9 times [2024-06-21 21:47:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:31,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228239774] [2024-06-21 21:47:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:34,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:34,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228239774] [2024-06-21 21:47:34,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228239774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:34,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:34,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:34,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536068186] [2024-06-21 21:47:34,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:34,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:34,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:34,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:34,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 333 transitions, 3822 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:34,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:34,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:34,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:36,291 INFO L124 PetriNetUnfolderBase]: 2464/4085 cut-off events. [2024-06-21 21:47:36,291 INFO L125 PetriNetUnfolderBase]: For 303011/303030 co-relation queries the response was YES. [2024-06-21 21:47:36,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27903 conditions, 4085 events. 2464/4085 cut-off events. For 303011/303030 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24861 event pairs, 534 based on Foata normal form. 16/4098 useless extension candidates. Maximal degree in co-relation 27778. Up to 3730 conditions per place. [2024-06-21 21:47:36,328 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 294 selfloop transitions, 57 changer transitions 0/356 dead transitions. [2024-06-21 21:47:36,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 356 transitions, 4594 flow [2024-06-21 21:47:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:47:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:47:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:47:36,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:47:36,329 INFO L175 Difference]: Start difference. First operand has 276 places, 333 transitions, 3822 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:47:36,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 356 transitions, 4594 flow [2024-06-21 21:47:37,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 356 transitions, 4316 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 21:47:37,162 INFO L231 Difference]: Finished difference. Result has 278 places, 333 transitions, 3672 flow [2024-06-21 21:47:37,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3544, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3672, PETRI_PLACES=278, PETRI_TRANSITIONS=333} [2024-06-21 21:47:37,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 21:47:37,162 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 333 transitions, 3672 flow [2024-06-21 21:47:37,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:37,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:37,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:37,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:47:37,163 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:37,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:37,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1856628637, now seen corresponding path program 10 times [2024-06-21 21:47:37,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:37,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438677963] [2024-06-21 21:47:37,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:37,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:40,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:40,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438677963] [2024-06-21 21:47:40,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438677963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:40,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:40,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:40,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44851578] [2024-06-21 21:47:40,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:40,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:40,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:40,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:40,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 333 transitions, 3672 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:40,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:40,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:40,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:41,709 INFO L124 PetriNetUnfolderBase]: 2461/4085 cut-off events. [2024-06-21 21:47:41,709 INFO L125 PetriNetUnfolderBase]: For 304889/304908 co-relation queries the response was YES. [2024-06-21 21:47:41,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27541 conditions, 4085 events. 2461/4085 cut-off events. For 304889/304908 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24915 event pairs, 536 based on Foata normal form. 15/4097 useless extension candidates. Maximal degree in co-relation 27416. Up to 3668 conditions per place. [2024-06-21 21:47:41,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 87 changer transitions 0/360 dead transitions. [2024-06-21 21:47:41,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 360 transitions, 4610 flow [2024-06-21 21:47:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:47:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:47:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:47:41,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 21:47:41,757 INFO L175 Difference]: Start difference. First operand has 278 places, 333 transitions, 3672 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:47:41,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 360 transitions, 4610 flow [2024-06-21 21:47:42,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 360 transitions, 4458 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:47:42,530 INFO L231 Difference]: Finished difference. Result has 277 places, 333 transitions, 3712 flow [2024-06-21 21:47:42,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3712, PETRI_PLACES=277, PETRI_TRANSITIONS=333} [2024-06-21 21:47:42,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 21:47:42,530 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 333 transitions, 3712 flow [2024-06-21 21:47:42,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:42,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:42,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:42,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:47:42,531 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:42,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1727085395, now seen corresponding path program 11 times [2024-06-21 21:47:42,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:42,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792156592] [2024-06-21 21:47:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:42,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:45,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:45,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792156592] [2024-06-21 21:47:45,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792156592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:45,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:45,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:45,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048427253] [2024-06-21 21:47:45,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:45,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:45,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:45,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 333 transitions, 3712 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:45,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:45,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:45,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:47,715 INFO L124 PetriNetUnfolderBase]: 2458/4077 cut-off events. [2024-06-21 21:47:47,715 INFO L125 PetriNetUnfolderBase]: For 294753/294772 co-relation queries the response was YES. [2024-06-21 21:47:47,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27391 conditions, 4077 events. 2458/4077 cut-off events. For 294753/294772 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24850 event pairs, 534 based on Foata normal form. 15/4089 useless extension candidates. Maximal degree in co-relation 27267. Up to 3665 conditions per place. [2024-06-21 21:47:47,759 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 90 changer transitions 0/370 dead transitions. [2024-06-21 21:47:47,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 370 transitions, 4696 flow [2024-06-21 21:47:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:47:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:47:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:47:47,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:47:47,760 INFO L175 Difference]: Start difference. First operand has 277 places, 333 transitions, 3712 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:47:47,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 370 transitions, 4696 flow [2024-06-21 21:47:48,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 370 transitions, 4434 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:47:48,607 INFO L231 Difference]: Finished difference. Result has 278 places, 333 transitions, 3652 flow [2024-06-21 21:47:48,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3652, PETRI_PLACES=278, PETRI_TRANSITIONS=333} [2024-06-21 21:47:48,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 21:47:48,608 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 333 transitions, 3652 flow [2024-06-21 21:47:48,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:48,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:48,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:48,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:47:48,608 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:48,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1549953875, now seen corresponding path program 12 times [2024-06-21 21:47:48,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:48,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606713038] [2024-06-21 21:47:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:48,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:48,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:51,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:51,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606713038] [2024-06-21 21:47:51,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606713038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:51,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:51,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:51,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87185339] [2024-06-21 21:47:51,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:51,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:51,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:51,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:51,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:51,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 333 transitions, 3652 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:51,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:51,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:51,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:53,227 INFO L124 PetriNetUnfolderBase]: 2455/4072 cut-off events. [2024-06-21 21:47:53,228 INFO L125 PetriNetUnfolderBase]: For 284355/284363 co-relation queries the response was YES. [2024-06-21 21:47:53,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27148 conditions, 4072 events. 2455/4072 cut-off events. For 284355/284363 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24798 event pairs, 532 based on Foata normal form. 9/4080 useless extension candidates. Maximal degree in co-relation 27024. Up to 3662 conditions per place. [2024-06-21 21:47:53,275 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 90 changer transitions 0/372 dead transitions. [2024-06-21 21:47:53,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 372 transitions, 4502 flow [2024-06-21 21:47:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:47:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:47:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:47:53,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:47:53,276 INFO L175 Difference]: Start difference. First operand has 278 places, 333 transitions, 3652 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:47:53,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 372 transitions, 4502 flow [2024-06-21 21:47:53,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 372 transitions, 4282 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 21:47:53,973 INFO L231 Difference]: Finished difference. Result has 276 places, 333 transitions, 3630 flow [2024-06-21 21:47:53,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3630, PETRI_PLACES=276, PETRI_TRANSITIONS=333} [2024-06-21 21:47:53,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 21:47:53,974 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 333 transitions, 3630 flow [2024-06-21 21:47:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:53,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:53,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:53,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:47:53,974 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:53,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1727501291, now seen corresponding path program 10 times [2024-06-21 21:47:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:53,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267277035] [2024-06-21 21:47:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:47:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:47:56,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:47:56,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267277035] [2024-06-21 21:47:56,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267277035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:47:56,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:47:56,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:47:56,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175372794] [2024-06-21 21:47:56,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:47:56,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:47:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:47:56,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:47:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:47:56,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:47:56,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 333 transitions, 3630 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:56,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:47:56,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:47:56,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:47:58,384 INFO L124 PetriNetUnfolderBase]: 2449/4067 cut-off events. [2024-06-21 21:47:58,384 INFO L125 PetriNetUnfolderBase]: For 267179/267198 co-relation queries the response was YES. [2024-06-21 21:47:58,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26754 conditions, 4067 events. 2449/4067 cut-off events. For 267179/267198 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24763 event pairs, 518 based on Foata normal form. 16/4080 useless extension candidates. Maximal degree in co-relation 26632. Up to 3590 conditions per place. [2024-06-21 21:47:58,430 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 256 selfloop transitions, 96 changer transitions 0/357 dead transitions. [2024-06-21 21:47:58,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 357 transitions, 4678 flow [2024-06-21 21:47:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:47:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:47:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:47:58,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 21:47:58,431 INFO L175 Difference]: Start difference. First operand has 276 places, 333 transitions, 3630 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:47:58,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 357 transitions, 4678 flow [2024-06-21 21:47:59,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 357 transitions, 4462 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 21:47:59,226 INFO L231 Difference]: Finished difference. Result has 274 places, 333 transitions, 3628 flow [2024-06-21 21:47:59,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3628, PETRI_PLACES=274, PETRI_TRANSITIONS=333} [2024-06-21 21:47:59,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 21:47:59,227 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 333 transitions, 3628 flow [2024-06-21 21:47:59,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:47:59,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:47:59,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:47:59,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:47:59,227 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:47:59,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:47:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1863294691, now seen corresponding path program 11 times [2024-06-21 21:47:59,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:47:59,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348951194] [2024-06-21 21:47:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:47:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:47:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:02,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:02,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348951194] [2024-06-21 21:48:02,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348951194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:02,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:02,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:48:02,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087282867] [2024-06-21 21:48:02,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:02,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:48:02,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:48:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:48:02,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:48:02,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 333 transitions, 3628 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:02,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:02,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:48:02,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:03,882 INFO L124 PetriNetUnfolderBase]: 2443/4058 cut-off events. [2024-06-21 21:48:03,883 INFO L125 PetriNetUnfolderBase]: For 248870/248878 co-relation queries the response was YES. [2024-06-21 21:48:03,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26407 conditions, 4058 events. 2443/4058 cut-off events. For 248870/248878 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24795 event pairs, 525 based on Foata normal form. 10/4067 useless extension candidates. Maximal degree in co-relation 26285. Up to 3651 conditions per place. [2024-06-21 21:48:03,923 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 281 selfloop transitions, 78 changer transitions 0/364 dead transitions. [2024-06-21 21:48:03,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 364 transitions, 4568 flow [2024-06-21 21:48:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:48:03,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:48:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:48:03,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:48:03,925 INFO L175 Difference]: Start difference. First operand has 274 places, 333 transitions, 3628 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:48:03,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 364 transitions, 4568 flow [2024-06-21 21:48:04,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 364 transitions, 4390 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:04,764 INFO L231 Difference]: Finished difference. Result has 278 places, 333 transitions, 3622 flow [2024-06-21 21:48:04,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3622, PETRI_PLACES=278, PETRI_TRANSITIONS=333} [2024-06-21 21:48:04,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 21:48:04,765 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 333 transitions, 3622 flow [2024-06-21 21:48:04,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:04,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:04,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:04,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:48:04,765 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:04,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:04,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1550191211, now seen corresponding path program 12 times [2024-06-21 21:48:04,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:04,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482076539] [2024-06-21 21:48:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:04,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:07,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:07,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482076539] [2024-06-21 21:48:07,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482076539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:07,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:07,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:48:07,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692987787] [2024-06-21 21:48:07,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:07,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:48:07,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:07,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:48:07,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:48:07,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:48:07,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 333 transitions, 3622 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:07,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:07,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:48:07,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:08,932 INFO L124 PetriNetUnfolderBase]: 2437/4048 cut-off events. [2024-06-21 21:48:08,932 INFO L125 PetriNetUnfolderBase]: For 244142/244150 co-relation queries the response was YES. [2024-06-21 21:48:08,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26185 conditions, 4048 events. 2437/4048 cut-off events. For 244142/244150 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24668 event pairs, 525 based on Foata normal form. 10/4057 useless extension candidates. Maximal degree in co-relation 26063. Up to 3646 conditions per place. [2024-06-21 21:48:08,978 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 278 selfloop transitions, 73 changer transitions 0/356 dead transitions. [2024-06-21 21:48:08,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 356 transitions, 4392 flow [2024-06-21 21:48:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:48:08,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:48:08,979 INFO L175 Difference]: Start difference. First operand has 278 places, 333 transitions, 3622 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:48:08,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 356 transitions, 4392 flow [2024-06-21 21:48:09,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 356 transitions, 4180 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 21:48:09,729 INFO L231 Difference]: Finished difference. Result has 275 places, 333 transitions, 3566 flow [2024-06-21 21:48:09,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3410, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3566, PETRI_PLACES=275, PETRI_TRANSITIONS=333} [2024-06-21 21:48:09,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 21:48:09,730 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 333 transitions, 3566 flow [2024-06-21 21:48:09,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:09,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:09,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:48:09,732 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:09,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:09,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1550200139, now seen corresponding path program 2 times [2024-06-21 21:48:09,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:09,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083862809] [2024-06-21 21:48:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:13,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083862809] [2024-06-21 21:48:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083862809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:13,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:13,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:13,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157900516] [2024-06-21 21:48:13,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:13,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:13,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:13,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:13,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:48:13,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 333 transitions, 3566 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:13,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:13,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:48:13,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:14,964 INFO L124 PetriNetUnfolderBase]: 2329/3915 cut-off events. [2024-06-21 21:48:14,964 INFO L125 PetriNetUnfolderBase]: For 258890/258901 co-relation queries the response was YES. [2024-06-21 21:48:14,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25445 conditions, 3915 events. 2329/3915 cut-off events. For 258890/258901 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24267 event pairs, 493 based on Foata normal form. 21/3909 useless extension candidates. Maximal degree in co-relation 25324. Up to 3333 conditions per place. [2024-06-21 21:48:15,006 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 261 selfloop transitions, 45 changer transitions 0/359 dead transitions. [2024-06-21 21:48:15,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 359 transitions, 4286 flow [2024-06-21 21:48:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 21:48:15,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 21:48:15,007 INFO L175 Difference]: Start difference. First operand has 275 places, 333 transitions, 3566 flow. Second operand 7 states and 127 transitions. [2024-06-21 21:48:15,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 359 transitions, 4286 flow [2024-06-21 21:48:15,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 359 transitions, 4134 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:48:15,557 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 3534 flow [2024-06-21 21:48:15,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3534, PETRI_PLACES=275, PETRI_TRANSITIONS=334} [2024-06-21 21:48:15,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 21:48:15,557 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 3534 flow [2024-06-21 21:48:15,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:15,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:15,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:15,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:48:15,558 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:15,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1963507019, now seen corresponding path program 3 times [2024-06-21 21:48:15,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:15,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228536480] [2024-06-21 21:48:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:19,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:19,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228536480] [2024-06-21 21:48:19,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228536480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:19,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:19,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861543576] [2024-06-21 21:48:19,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:19,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:19,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:48:19,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 334 transitions, 3534 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:19,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:19,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:48:19,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:20,986 INFO L124 PetriNetUnfolderBase]: 2366/3968 cut-off events. [2024-06-21 21:48:20,986 INFO L125 PetriNetUnfolderBase]: For 260861/260884 co-relation queries the response was YES. [2024-06-21 21:48:21,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25811 conditions, 3968 events. 2366/3968 cut-off events. For 260861/260884 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24653 event pairs, 501 based on Foata normal form. 31/3962 useless extension candidates. Maximal degree in co-relation 25690. Up to 3423 conditions per place. [2024-06-21 21:48:21,028 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 251 selfloop transitions, 50 changer transitions 0/354 dead transitions. [2024-06-21 21:48:21,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 354 transitions, 4228 flow [2024-06-21 21:48:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:48:21,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:48:21,029 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 3534 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:48:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 354 transitions, 4228 flow [2024-06-21 21:48:21,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 354 transitions, 4134 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:21,613 INFO L231 Difference]: Finished difference. Result has 277 places, 335 transitions, 3568 flow [2024-06-21 21:48:21,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3568, PETRI_PLACES=277, PETRI_TRANSITIONS=335} [2024-06-21 21:48:21,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 21:48:21,614 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 335 transitions, 3568 flow [2024-06-21 21:48:21,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:21,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:21,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:21,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:48:21,614 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:21,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:21,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1963982249, now seen corresponding path program 4 times [2024-06-21 21:48:21,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:21,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602715991] [2024-06-21 21:48:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:21,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:25,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:25,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602715991] [2024-06-21 21:48:25,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602715991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:25,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:25,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:25,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070176758] [2024-06-21 21:48:25,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:25,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:25,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:25,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:25,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:48:25,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 335 transitions, 3568 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:25,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:25,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:48:25,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:26,795 INFO L124 PetriNetUnfolderBase]: 2368/3974 cut-off events. [2024-06-21 21:48:26,795 INFO L125 PetriNetUnfolderBase]: For 242862/242885 co-relation queries the response was YES. [2024-06-21 21:48:26,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25504 conditions, 3974 events. 2368/3974 cut-off events. For 242862/242885 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24681 event pairs, 497 based on Foata normal form. 27/3964 useless extension candidates. Maximal degree in co-relation 25382. Up to 3305 conditions per place. [2024-06-21 21:48:26,836 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 54 changer transitions 0/357 dead transitions. [2024-06-21 21:48:26,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 357 transitions, 4286 flow [2024-06-21 21:48:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:26,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:48:26,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:48:26,837 INFO L175 Difference]: Start difference. First operand has 277 places, 335 transitions, 3568 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:48:26,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 357 transitions, 4286 flow [2024-06-21 21:48:27,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 357 transitions, 4182 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:27,460 INFO L231 Difference]: Finished difference. Result has 279 places, 336 transitions, 3598 flow [2024-06-21 21:48:27,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3598, PETRI_PLACES=279, PETRI_TRANSITIONS=336} [2024-06-21 21:48:27,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 21:48:27,460 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 336 transitions, 3598 flow [2024-06-21 21:48:27,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:27,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:27,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:27,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:48:27,461 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:27,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1993774993, now seen corresponding path program 1 times [2024-06-21 21:48:27,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:27,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338903807] [2024-06-21 21:48:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:27,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:30,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:30,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338903807] [2024-06-21 21:48:30,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338903807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:30,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:30,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:48:30,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759672729] [2024-06-21 21:48:30,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:30,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:48:30,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:30,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:48:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:48:30,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:48:30,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 336 transitions, 3598 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:30,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:30,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:48:30,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:31,612 INFO L124 PetriNetUnfolderBase]: 2535/4203 cut-off events. [2024-06-21 21:48:31,613 INFO L125 PetriNetUnfolderBase]: For 237894/237896 co-relation queries the response was YES. [2024-06-21 21:48:31,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26817 conditions, 4203 events. 2535/4203 cut-off events. For 237894/237896 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25727 event pairs, 516 based on Foata normal form. 2/4204 useless extension candidates. Maximal degree in co-relation 26694. Up to 3886 conditions per place. [2024-06-21 21:48:31,654 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 32 changer transitions 0/368 dead transitions. [2024-06-21 21:48:31,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 368 transitions, 4626 flow [2024-06-21 21:48:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:48:31,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:48:31,655 INFO L175 Difference]: Start difference. First operand has 279 places, 336 transitions, 3598 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:48:31,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 368 transitions, 4626 flow [2024-06-21 21:48:32,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 368 transitions, 4508 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:48:32,250 INFO L231 Difference]: Finished difference. Result has 282 places, 340 transitions, 3645 flow [2024-06-21 21:48:32,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3645, PETRI_PLACES=282, PETRI_TRANSITIONS=340} [2024-06-21 21:48:32,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-21 21:48:32,250 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 340 transitions, 3645 flow [2024-06-21 21:48:32,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:32,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:32,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:32,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:48:32,251 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:32,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1993835443, now seen corresponding path program 2 times [2024-06-21 21:48:32,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:32,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374119770] [2024-06-21 21:48:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:32,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:34,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374119770] [2024-06-21 21:48:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374119770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:34,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:34,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:48:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877164619] [2024-06-21 21:48:34,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:48:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:48:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:48:34,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:48:34,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 340 transitions, 3645 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:34,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:34,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:48:34,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:36,737 INFO L124 PetriNetUnfolderBase]: 2543/4215 cut-off events. [2024-06-21 21:48:36,737 INFO L125 PetriNetUnfolderBase]: For 243943/243945 co-relation queries the response was YES. [2024-06-21 21:48:36,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26874 conditions, 4215 events. 2543/4215 cut-off events. For 243943/243945 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25794 event pairs, 554 based on Foata normal form. 2/4216 useless extension candidates. Maximal degree in co-relation 26750. Up to 3935 conditions per place. [2024-06-21 21:48:36,778 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 29 changer transitions 0/364 dead transitions. [2024-06-21 21:48:36,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 364 transitions, 4473 flow [2024-06-21 21:48:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:48:36,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:48:36,780 INFO L175 Difference]: Start difference. First operand has 282 places, 340 transitions, 3645 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:48:36,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 364 transitions, 4473 flow [2024-06-21 21:48:37,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 364 transitions, 4367 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 21:48:37,504 INFO L231 Difference]: Finished difference. Result has 286 places, 342 transitions, 3656 flow [2024-06-21 21:48:37,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3656, PETRI_PLACES=286, PETRI_TRANSITIONS=342} [2024-06-21 21:48:37,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-21 21:48:37,504 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 342 transitions, 3656 flow [2024-06-21 21:48:37,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:37,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:37,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:37,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:48:37,505 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:37,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:37,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2111923123, now seen corresponding path program 3 times [2024-06-21 21:48:37,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:37,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774669316] [2024-06-21 21:48:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:37,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:40,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:40,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774669316] [2024-06-21 21:48:40,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774669316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:40,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:40,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:48:40,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314758762] [2024-06-21 21:48:40,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:40,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:48:40,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:48:40,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:48:40,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:48:40,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 342 transitions, 3656 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:40,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:40,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:48:40,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:41,826 INFO L124 PetriNetUnfolderBase]: 2551/4227 cut-off events. [2024-06-21 21:48:41,827 INFO L125 PetriNetUnfolderBase]: For 250859/250861 co-relation queries the response was YES. [2024-06-21 21:48:41,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26987 conditions, 4227 events. 2551/4227 cut-off events. For 250859/250861 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25886 event pairs, 554 based on Foata normal form. 2/4228 useless extension candidates. Maximal degree in co-relation 26861. Up to 3964 conditions per place. [2024-06-21 21:48:41,867 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 21 changer transitions 0/362 dead transitions. [2024-06-21 21:48:41,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 362 transitions, 4456 flow [2024-06-21 21:48:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 21:48:41,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 21:48:41,869 INFO L175 Difference]: Start difference. First operand has 286 places, 342 transitions, 3656 flow. Second operand 8 states and 125 transitions. [2024-06-21 21:48:41,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 362 transitions, 4456 flow [2024-06-21 21:48:42,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 362 transitions, 4375 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:42,446 INFO L231 Difference]: Finished difference. Result has 288 places, 344 transitions, 3664 flow [2024-06-21 21:48:42,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3664, PETRI_PLACES=288, PETRI_TRANSITIONS=344} [2024-06-21 21:48:42,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:48:42,447 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 344 transitions, 3664 flow [2024-06-21 21:48:42,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:42,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:42,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:42,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:48:42,448 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:42,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1090652803, now seen corresponding path program 1 times [2024-06-21 21:48:42,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:42,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261928612] [2024-06-21 21:48:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:42,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:46,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:46,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261928612] [2024-06-21 21:48:46,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261928612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:46,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:46,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:48:46,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263878423] [2024-06-21 21:48:46,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:48:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:46,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:48:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:48:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:48:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 344 transitions, 3664 flow. Second operand has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:46,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:48:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:48,168 INFO L124 PetriNetUnfolderBase]: 2559/4235 cut-off events. [2024-06-21 21:48:48,168 INFO L125 PetriNetUnfolderBase]: For 257757/257759 co-relation queries the response was YES. [2024-06-21 21:48:48,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27125 conditions, 4235 events. 2559/4235 cut-off events. For 257757/257759 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25872 event pairs, 532 based on Foata normal form. 2/4236 useless extension candidates. Maximal degree in co-relation 26998. Up to 3953 conditions per place. [2024-06-21 21:48:48,215 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 28 changer transitions 0/367 dead transitions. [2024-06-21 21:48:48,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 367 transitions, 4484 flow [2024-06-21 21:48:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:48:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:48:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 21:48:48,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:48:48,216 INFO L175 Difference]: Start difference. First operand has 288 places, 344 transitions, 3664 flow. Second operand 8 states and 130 transitions. [2024-06-21 21:48:48,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 367 transitions, 4484 flow [2024-06-21 21:48:48,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 367 transitions, 4415 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:48,994 INFO L231 Difference]: Finished difference. Result has 290 places, 346 transitions, 3702 flow [2024-06-21 21:48:48,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3702, PETRI_PLACES=290, PETRI_TRANSITIONS=346} [2024-06-21 21:48:48,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 21:48:48,995 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 346 transitions, 3702 flow [2024-06-21 21:48:48,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.636363636363637) internal successors, (106), 11 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:48,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:48,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:48,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:48:48,995 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:48,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1727331473, now seen corresponding path program 4 times [2024-06-21 21:48:48,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:48,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713796354] [2024-06-21 21:48:48,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:48,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:51,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:51,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713796354] [2024-06-21 21:48:51,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713796354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:51,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:51,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:48:51,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266727367] [2024-06-21 21:48:51,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:51,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:48:51,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:51,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:48:51,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:48:51,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:48:51,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 346 transitions, 3702 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:51,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:51,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:48:51,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:53,144 INFO L124 PetriNetUnfolderBase]: 2554/4232 cut-off events. [2024-06-21 21:48:53,144 INFO L125 PetriNetUnfolderBase]: For 259820/259822 co-relation queries the response was YES. [2024-06-21 21:48:53,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27095 conditions, 4232 events. 2554/4232 cut-off events. For 259820/259822 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25889 event pairs, 515 based on Foata normal form. 2/4233 useless extension candidates. Maximal degree in co-relation 26967. Up to 3927 conditions per place. [2024-06-21 21:48:53,195 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 30 changer transitions 0/371 dead transitions. [2024-06-21 21:48:53,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 371 transitions, 4504 flow [2024-06-21 21:48:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:48:53,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:48:53,197 INFO L175 Difference]: Start difference. First operand has 290 places, 346 transitions, 3702 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:48:53,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 371 transitions, 4504 flow [2024-06-21 21:48:53,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 371 transitions, 4389 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:53,843 INFO L231 Difference]: Finished difference. Result has 291 places, 346 transitions, 3658 flow [2024-06-21 21:48:53,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3658, PETRI_PLACES=291, PETRI_TRANSITIONS=346} [2024-06-21 21:48:53,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 21:48:53,843 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 346 transitions, 3658 flow [2024-06-21 21:48:53,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:53,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:53,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:53,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:48:53,844 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:53,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1955647961, now seen corresponding path program 2 times [2024-06-21 21:48:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:53,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519952593] [2024-06-21 21:48:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:48:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:48:57,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:48:57,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519952593] [2024-06-21 21:48:57,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519952593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:48:57,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:48:57,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:48:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145284300] [2024-06-21 21:48:57,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:48:57,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:48:57,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:48:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:48:57,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:48:57,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:48:57,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 346 transitions, 3658 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:57,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:48:57,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:48:57,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:48:58,921 INFO L124 PetriNetUnfolderBase]: 2562/4245 cut-off events. [2024-06-21 21:48:58,921 INFO L125 PetriNetUnfolderBase]: For 266872/266876 co-relation queries the response was YES. [2024-06-21 21:48:58,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27220 conditions, 4245 events. 2562/4245 cut-off events. For 266872/266876 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 26034 event pairs, 536 based on Foata normal form. 4/4248 useless extension candidates. Maximal degree in co-relation 27091. Up to 3958 conditions per place. [2024-06-21 21:48:58,971 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 331 selfloop transitions, 27 changer transitions 0/363 dead transitions. [2024-06-21 21:48:58,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 363 transitions, 4458 flow [2024-06-21 21:48:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:48:58,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:48:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:48:58,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:48:58,972 INFO L175 Difference]: Start difference. First operand has 291 places, 346 transitions, 3658 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:48:58,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 363 transitions, 4458 flow [2024-06-21 21:48:59,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 363 transitions, 4389 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:48:59,721 INFO L231 Difference]: Finished difference. Result has 292 places, 348 transitions, 3698 flow [2024-06-21 21:48:59,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3589, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3698, PETRI_PLACES=292, PETRI_TRANSITIONS=348} [2024-06-21 21:48:59,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 21:48:59,722 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 348 transitions, 3698 flow [2024-06-21 21:48:59,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:48:59,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:48:59,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:48:59,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:48:59,722 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:48:59,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:48:59,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1727516171, now seen corresponding path program 3 times [2024-06-21 21:48:59,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:48:59,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213247217] [2024-06-21 21:48:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:48:59,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:48:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:03,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:03,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213247217] [2024-06-21 21:49:03,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213247217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:03,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:03,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:03,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950488679] [2024-06-21 21:49:03,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:03,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:03,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:03,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:03,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:03,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 348 transitions, 3698 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:03,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:03,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:03,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:04,774 INFO L124 PetriNetUnfolderBase]: 2570/4252 cut-off events. [2024-06-21 21:49:04,775 INFO L125 PetriNetUnfolderBase]: For 267584/267586 co-relation queries the response was YES. [2024-06-21 21:49:04,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27396 conditions, 4252 events. 2570/4252 cut-off events. For 267584/267586 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 26003 event pairs, 533 based on Foata normal form. 2/4253 useless extension candidates. Maximal degree in co-relation 27266. Up to 3964 conditions per place. [2024-06-21 21:49:04,826 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 335 selfloop transitions, 30 changer transitions 0/370 dead transitions. [2024-06-21 21:49:04,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 370 transitions, 4530 flow [2024-06-21 21:49:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:49:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:49:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 21:49:04,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 21:49:04,827 INFO L175 Difference]: Start difference. First operand has 292 places, 348 transitions, 3698 flow. Second operand 7 states and 118 transitions. [2024-06-21 21:49:04,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 370 transitions, 4530 flow [2024-06-21 21:49:05,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 370 transitions, 4437 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:49:05,581 INFO L231 Difference]: Finished difference. Result has 294 places, 350 transitions, 3727 flow [2024-06-21 21:49:05,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3605, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3727, PETRI_PLACES=294, PETRI_TRANSITIONS=350} [2024-06-21 21:49:05,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 21:49:05,581 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 350 transitions, 3727 flow [2024-06-21 21:49:05,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:05,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:05,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:05,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:49:05,582 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:05,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1963988201, now seen corresponding path program 4 times [2024-06-21 21:49:05,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:05,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5223242] [2024-06-21 21:49:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:05,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:09,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:09,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5223242] [2024-06-21 21:49:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5223242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:09,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:09,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72510053] [2024-06-21 21:49:09,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:09,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:09,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:09,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:09,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 350 transitions, 3727 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:09,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:09,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:09,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:10,467 INFO L124 PetriNetUnfolderBase]: 2565/4250 cut-off events. [2024-06-21 21:49:10,468 INFO L125 PetriNetUnfolderBase]: For 269762/269766 co-relation queries the response was YES. [2024-06-21 21:49:10,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27317 conditions, 4250 events. 2565/4250 cut-off events. For 269762/269766 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26050 event pairs, 529 based on Foata normal form. 4/4253 useless extension candidates. Maximal degree in co-relation 27186. Up to 3937 conditions per place. [2024-06-21 21:49:10,516 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 328 selfloop transitions, 34 changer transitions 0/367 dead transitions. [2024-06-21 21:49:10,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 367 transitions, 4543 flow [2024-06-21 21:49:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:49:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:49:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 21:49:10,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:49:10,517 INFO L175 Difference]: Start difference. First operand has 294 places, 350 transitions, 3727 flow. Second operand 7 states and 112 transitions. [2024-06-21 21:49:10,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 367 transitions, 4543 flow [2024-06-21 21:49:11,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 367 transitions, 4437 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:49:11,288 INFO L231 Difference]: Finished difference. Result has 296 places, 352 transitions, 3752 flow [2024-06-21 21:49:11,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3752, PETRI_PLACES=296, PETRI_TRANSITIONS=352} [2024-06-21 21:49:11,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 21:49:11,289 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 352 transitions, 3752 flow [2024-06-21 21:49:11,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:11,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:11,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:11,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:49:11,289 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:11,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash -51187310, now seen corresponding path program 1 times [2024-06-21 21:49:11,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:11,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643117707] [2024-06-21 21:49:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:11,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:14,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:14,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643117707] [2024-06-21 21:49:14,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643117707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:14,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:14,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:14,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113653330] [2024-06-21 21:49:14,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:14,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:14,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:14,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:14,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:14,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 352 transitions, 3752 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:14,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:14,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:14,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:16,494 INFO L124 PetriNetUnfolderBase]: 2641/4379 cut-off events. [2024-06-21 21:49:16,495 INFO L125 PetriNetUnfolderBase]: For 285861/285867 co-relation queries the response was YES. [2024-06-21 21:49:16,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27905 conditions, 4379 events. 2641/4379 cut-off events. For 285861/285867 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26856 event pairs, 457 based on Foata normal form. 14/4392 useless extension candidates. Maximal degree in co-relation 27773. Up to 3762 conditions per place. [2024-06-21 21:49:16,548 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 59 changer transitions 0/406 dead transitions. [2024-06-21 21:49:16,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 406 transitions, 4931 flow [2024-06-21 21:49:16,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:49:16,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:49:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 21:49:16,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-21 21:49:16,549 INFO L175 Difference]: Start difference. First operand has 296 places, 352 transitions, 3752 flow. Second operand 11 states and 188 transitions. [2024-06-21 21:49:16,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 406 transitions, 4931 flow [2024-06-21 21:49:17,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 406 transitions, 4820 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 21:49:17,480 INFO L231 Difference]: Finished difference. Result has 304 places, 357 transitions, 3852 flow [2024-06-21 21:49:17,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3852, PETRI_PLACES=304, PETRI_TRANSITIONS=357} [2024-06-21 21:49:17,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 21:49:17,481 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 357 transitions, 3852 flow [2024-06-21 21:49:17,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:17,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:17,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:17,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:49:17,481 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:17,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:17,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1123676024, now seen corresponding path program 2 times [2024-06-21 21:49:17,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:17,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419996994] [2024-06-21 21:49:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:17,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:21,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:21,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419996994] [2024-06-21 21:49:21,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419996994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:21,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:21,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:21,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794281503] [2024-06-21 21:49:21,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:21,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:21,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:21,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:21,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 357 transitions, 3852 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:21,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:21,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:21,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:22,992 INFO L124 PetriNetUnfolderBase]: 2733/4531 cut-off events. [2024-06-21 21:49:22,992 INFO L125 PetriNetUnfolderBase]: For 294786/294792 co-relation queries the response was YES. [2024-06-21 21:49:23,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29091 conditions, 4531 events. 2733/4531 cut-off events. For 294786/294792 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 28067 event pairs, 557 based on Foata normal form. 14/4544 useless extension candidates. Maximal degree in co-relation 28956. Up to 4048 conditions per place. [2024-06-21 21:49:23,047 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 346 selfloop transitions, 64 changer transitions 0/415 dead transitions. [2024-06-21 21:49:23,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 415 transitions, 5000 flow [2024-06-21 21:49:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:49:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:49:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-21 21:49:23,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 21:49:23,049 INFO L175 Difference]: Start difference. First operand has 304 places, 357 transitions, 3852 flow. Second operand 12 states and 195 transitions. [2024-06-21 21:49:23,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 415 transitions, 5000 flow [2024-06-21 21:49:23,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 415 transitions, 4824 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 21:49:23,911 INFO L231 Difference]: Finished difference. Result has 309 places, 370 transitions, 3996 flow [2024-06-21 21:49:23,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3692, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3996, PETRI_PLACES=309, PETRI_TRANSITIONS=370} [2024-06-21 21:49:23,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 21:49:23,912 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 370 transitions, 3996 flow [2024-06-21 21:49:23,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:23,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:23,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:23,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:49:23,912 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:23,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:23,913 INFO L85 PathProgramCache]: Analyzing trace with hash 946516604, now seen corresponding path program 1 times [2024-06-21 21:49:23,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:23,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376372740] [2024-06-21 21:49:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:23,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:27,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:27,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376372740] [2024-06-21 21:49:27,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376372740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:27,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:27,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:27,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975069781] [2024-06-21 21:49:27,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:27,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:27,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:27,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:27,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:27,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:27,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 370 transitions, 3996 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:27,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:27,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:27,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:29,030 INFO L124 PetriNetUnfolderBase]: 2746/4547 cut-off events. [2024-06-21 21:49:29,030 INFO L125 PetriNetUnfolderBase]: For 285483/285489 co-relation queries the response was YES. [2024-06-21 21:49:29,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29216 conditions, 4547 events. 2746/4547 cut-off events. For 285483/285489 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28109 event pairs, 579 based on Foata normal form. 7/4553 useless extension candidates. Maximal degree in co-relation 29081. Up to 4124 conditions per place. [2024-06-21 21:49:29,087 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 63 changer transitions 0/415 dead transitions. [2024-06-21 21:49:29,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 415 transitions, 5200 flow [2024-06-21 21:49:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:49:29,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:49:29,088 INFO L175 Difference]: Start difference. First operand has 309 places, 370 transitions, 3996 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:49:29,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 415 transitions, 5200 flow [2024-06-21 21:49:29,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 415 transitions, 5066 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:49:29,953 INFO L231 Difference]: Finished difference. Result has 311 places, 376 transitions, 4120 flow [2024-06-21 21:49:29,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4120, PETRI_PLACES=311, PETRI_TRANSITIONS=376} [2024-06-21 21:49:29,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 21:49:29,954 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 376 transitions, 4120 flow [2024-06-21 21:49:29,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:29,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:29,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:29,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:49:29,954 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:29,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:29,955 INFO L85 PathProgramCache]: Analyzing trace with hash 511778600, now seen corresponding path program 2 times [2024-06-21 21:49:29,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:29,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386690004] [2024-06-21 21:49:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:29,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:33,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:33,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386690004] [2024-06-21 21:49:33,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386690004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:33,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:33,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:33,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109875034] [2024-06-21 21:49:33,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:33,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:33,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:33,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:33,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:33,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 376 transitions, 4120 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:33,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:33,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:33,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:35,555 INFO L124 PetriNetUnfolderBase]: 2761/4570 cut-off events. [2024-06-21 21:49:35,556 INFO L125 PetriNetUnfolderBase]: For 294680/294686 co-relation queries the response was YES. [2024-06-21 21:49:35,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29775 conditions, 4570 events. 2761/4570 cut-off events. For 294680/294686 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28309 event pairs, 579 based on Foata normal form. 7/4576 useless extension candidates. Maximal degree in co-relation 29639. Up to 4164 conditions per place. [2024-06-21 21:49:35,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 64 changer transitions 0/419 dead transitions. [2024-06-21 21:49:35,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 419 transitions, 5184 flow [2024-06-21 21:49:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:49:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:49:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:49:35,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:49:35,611 INFO L175 Difference]: Start difference. First operand has 311 places, 376 transitions, 4120 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:49:35,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 419 transitions, 5184 flow [2024-06-21 21:49:36,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 419 transitions, 5005 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 21:49:36,475 INFO L231 Difference]: Finished difference. Result has 315 places, 385 transitions, 4218 flow [2024-06-21 21:49:36,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3971, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4218, PETRI_PLACES=315, PETRI_TRANSITIONS=385} [2024-06-21 21:49:36,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 21:49:36,476 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 385 transitions, 4218 flow [2024-06-21 21:49:36,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:36,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:36,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:36,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:49:36,476 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:36,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash 37470706, now seen corresponding path program 1 times [2024-06-21 21:49:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:36,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566022806] [2024-06-21 21:49:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:36,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:39,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:39,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566022806] [2024-06-21 21:49:39,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566022806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:39,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:39,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296304567] [2024-06-21 21:49:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:39,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:39,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:39,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:39,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 385 transitions, 4218 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:39,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:39,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:39,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:41,857 INFO L124 PetriNetUnfolderBase]: 2787/4610 cut-off events. [2024-06-21 21:49:41,857 INFO L125 PetriNetUnfolderBase]: For 311687/311693 co-relation queries the response was YES. [2024-06-21 21:49:41,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30372 conditions, 4610 events. 2787/4610 cut-off events. For 311687/311693 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 28588 event pairs, 567 based on Foata normal form. 8/4617 useless extension candidates. Maximal degree in co-relation 30234. Up to 4128 conditions per place. [2024-06-21 21:49:41,915 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 80 changer transitions 0/432 dead transitions. [2024-06-21 21:49:41,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 432 transitions, 5456 flow [2024-06-21 21:49:41,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:49:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:49:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 21:49:41,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 21:49:41,917 INFO L175 Difference]: Start difference. First operand has 315 places, 385 transitions, 4218 flow. Second operand 11 states and 185 transitions. [2024-06-21 21:49:41,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 432 transitions, 5456 flow [2024-06-21 21:49:42,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 432 transitions, 5297 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 21:49:42,798 INFO L231 Difference]: Finished difference. Result has 320 places, 391 transitions, 4348 flow [2024-06-21 21:49:42,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4059, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4348, PETRI_PLACES=320, PETRI_TRANSITIONS=391} [2024-06-21 21:49:42,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 21:49:42,798 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 391 transitions, 4348 flow [2024-06-21 21:49:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:42,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:42,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:49:42,799 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:42,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1122578802, now seen corresponding path program 3 times [2024-06-21 21:49:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801648127] [2024-06-21 21:49:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801648127] [2024-06-21 21:49:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801648127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:46,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405709228] [2024-06-21 21:49:46,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:46,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:46,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:46,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:46,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 391 transitions, 4348 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:46,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:46,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:46,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:48,841 INFO L124 PetriNetUnfolderBase]: 2802/4625 cut-off events. [2024-06-21 21:49:48,841 INFO L125 PetriNetUnfolderBase]: For 318456/318462 co-relation queries the response was YES. [2024-06-21 21:49:48,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30994 conditions, 4625 events. 2802/4625 cut-off events. For 318456/318462 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 28623 event pairs, 576 based on Foata normal form. 7/4631 useless extension candidates. Maximal degree in co-relation 30855. Up to 4214 conditions per place. [2024-06-21 21:49:48,894 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 358 selfloop transitions, 74 changer transitions 0/437 dead transitions. [2024-06-21 21:49:48,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 437 transitions, 5438 flow [2024-06-21 21:49:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:49:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:49:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-21 21:49:48,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-21 21:49:48,896 INFO L175 Difference]: Start difference. First operand has 320 places, 391 transitions, 4348 flow. Second operand 12 states and 191 transitions. [2024-06-21 21:49:48,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 437 transitions, 5438 flow [2024-06-21 21:49:49,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 437 transitions, 5285 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 21:49:49,766 INFO L231 Difference]: Finished difference. Result has 325 places, 400 transitions, 4476 flow [2024-06-21 21:49:49,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4476, PETRI_PLACES=325, PETRI_TRANSITIONS=400} [2024-06-21 21:49:49,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 21:49:49,767 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 400 transitions, 4476 flow [2024-06-21 21:49:49,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:49,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:49,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:49,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:49:49,768 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:49,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1123768280, now seen corresponding path program 2 times [2024-06-21 21:49:49,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:49,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039181886] [2024-06-21 21:49:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:49,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:49:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:49:53,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:49:53,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039181886] [2024-06-21 21:49:53,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039181886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:49:53,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:49:53,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:49:53,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669671588] [2024-06-21 21:49:53,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:49:53,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:49:53,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:49:53,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:49:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:49:53,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:49:53,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 400 transitions, 4476 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:53,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:49:53,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:49:53,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:49:55,522 INFO L124 PetriNetUnfolderBase]: 2828/4665 cut-off events. [2024-06-21 21:49:55,522 INFO L125 PetriNetUnfolderBase]: For 335176/335182 co-relation queries the response was YES. [2024-06-21 21:49:55,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31572 conditions, 4665 events. 2828/4665 cut-off events. For 335176/335182 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28934 event pairs, 565 based on Foata normal form. 8/4672 useless extension candidates. Maximal degree in co-relation 31431. Up to 4168 conditions per place. [2024-06-21 21:49:55,581 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 358 selfloop transitions, 91 changer transitions 0/454 dead transitions. [2024-06-21 21:49:55,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 454 transitions, 5914 flow [2024-06-21 21:49:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:49:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:49:55,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 227 transitions. [2024-06-21 21:49:55,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38605442176870747 [2024-06-21 21:49:55,583 INFO L175 Difference]: Start difference. First operand has 325 places, 400 transitions, 4476 flow. Second operand 14 states and 227 transitions. [2024-06-21 21:49:55,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 454 transitions, 5914 flow [2024-06-21 21:49:56,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 454 transitions, 5727 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 21:49:56,622 INFO L231 Difference]: Finished difference. Result has 330 places, 406 transitions, 4574 flow [2024-06-21 21:49:56,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4289, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4574, PETRI_PLACES=330, PETRI_TRANSITIONS=406} [2024-06-21 21:49:56,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 21:49:56,622 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 406 transitions, 4574 flow [2024-06-21 21:49:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:49:56,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:49:56,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:49:56,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:49:56,623 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:49:56,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:49:56,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1124005430, now seen corresponding path program 3 times [2024-06-21 21:49:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:49:56,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049353949] [2024-06-21 21:49:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:49:56,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:49:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:00,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:00,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049353949] [2024-06-21 21:50:00,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049353949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:00,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:00,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:00,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730196419] [2024-06-21 21:50:00,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:00,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:00,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:00,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:00,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:00,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:00,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 406 transitions, 4574 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:00,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:00,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:00,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:02,753 INFO L124 PetriNetUnfolderBase]: 2822/4657 cut-off events. [2024-06-21 21:50:02,753 INFO L125 PetriNetUnfolderBase]: For 336542/336548 co-relation queries the response was YES. [2024-06-21 21:50:02,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31499 conditions, 4657 events. 2822/4657 cut-off events. For 336542/336548 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28859 event pairs, 565 based on Foata normal form. 8/4664 useless extension candidates. Maximal degree in co-relation 31357. Up to 4163 conditions per place. [2024-06-21 21:50:02,813 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 354 selfloop transitions, 93 changer transitions 0/452 dead transitions. [2024-06-21 21:50:02,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 452 transitions, 5752 flow [2024-06-21 21:50:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:50:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:50:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 223 transitions. [2024-06-21 21:50:02,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792517006802721 [2024-06-21 21:50:02,815 INFO L175 Difference]: Start difference. First operand has 330 places, 406 transitions, 4574 flow. Second operand 14 states and 223 transitions. [2024-06-21 21:50:02,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 452 transitions, 5752 flow [2024-06-21 21:50:04,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 452 transitions, 5514 flow, removed 30 selfloop flow, removed 11 redundant places. [2024-06-21 21:50:04,012 INFO L231 Difference]: Finished difference. Result has 333 places, 406 transitions, 4528 flow [2024-06-21 21:50:04,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4336, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4528, PETRI_PLACES=333, PETRI_TRANSITIONS=406} [2024-06-21 21:50:04,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 21:50:04,012 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 406 transitions, 4528 flow [2024-06-21 21:50:04,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:04,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:04,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:04,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:50:04,013 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:04,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:04,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1427248662, now seen corresponding path program 3 times [2024-06-21 21:50:04,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:04,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532629520] [2024-06-21 21:50:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:04,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:07,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:07,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532629520] [2024-06-21 21:50:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532629520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:07,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:07,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:07,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718226622] [2024-06-21 21:50:07,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:07,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:07,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:07,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 406 transitions, 4528 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:07,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:07,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:07,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:09,563 INFO L124 PetriNetUnfolderBase]: 2858/4710 cut-off events. [2024-06-21 21:50:09,563 INFO L125 PetriNetUnfolderBase]: For 364736/364738 co-relation queries the response was YES. [2024-06-21 21:50:09,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31865 conditions, 4710 events. 2858/4710 cut-off events. For 364736/364738 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29212 event pairs, 571 based on Foata normal form. 8/4717 useless extension candidates. Maximal degree in co-relation 31722. Up to 4230 conditions per place. [2024-06-21 21:50:09,621 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 379 selfloop transitions, 61 changer transitions 0/445 dead transitions. [2024-06-21 21:50:09,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 445 transitions, 5587 flow [2024-06-21 21:50:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:50:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:50:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-21 21:50:09,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-21 21:50:09,622 INFO L175 Difference]: Start difference. First operand has 333 places, 406 transitions, 4528 flow. Second operand 12 states and 190 transitions. [2024-06-21 21:50:09,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 445 transitions, 5587 flow [2024-06-21 21:50:11,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 445 transitions, 5380 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 21:50:11,012 INFO L231 Difference]: Finished difference. Result has 333 places, 409 transitions, 4507 flow [2024-06-21 21:50:11,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4507, PETRI_PLACES=333, PETRI_TRANSITIONS=409} [2024-06-21 21:50:11,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 21:50:11,013 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 409 transitions, 4507 flow [2024-06-21 21:50:11,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:11,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:11,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:11,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:50:11,014 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:11,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:11,014 INFO L85 PathProgramCache]: Analyzing trace with hash 225690898, now seen corresponding path program 4 times [2024-06-21 21:50:11,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876231387] [2024-06-21 21:50:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:11,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876231387] [2024-06-21 21:50:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876231387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:14,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904663292] [2024-06-21 21:50:14,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:14,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:14,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:14,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:14,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 409 transitions, 4507 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:14,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:14,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:14,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:16,971 INFO L124 PetriNetUnfolderBase]: 2879/4737 cut-off events. [2024-06-21 21:50:16,971 INFO L125 PetriNetUnfolderBase]: For 357995/357997 co-relation queries the response was YES. [2024-06-21 21:50:17,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32394 conditions, 4737 events. 2879/4737 cut-off events. For 357995/357997 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 29313 event pairs, 612 based on Foata normal form. 1/4736 useless extension candidates. Maximal degree in co-relation 32249. Up to 4007 conditions per place. [2024-06-21 21:50:17,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 154 changer transitions 0/458 dead transitions. [2024-06-21 21:50:17,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 458 transitions, 6441 flow [2024-06-21 21:50:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:17,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:17,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:50:17,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:50:17,033 INFO L175 Difference]: Start difference. First operand has 333 places, 409 transitions, 4507 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:50:17,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 458 transitions, 6441 flow [2024-06-21 21:50:18,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 458 transitions, 6308 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 21:50:18,468 INFO L231 Difference]: Finished difference. Result has 335 places, 421 transitions, 4966 flow [2024-06-21 21:50:18,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4966, PETRI_PLACES=335, PETRI_TRANSITIONS=421} [2024-06-21 21:50:18,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 21:50:18,469 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 421 transitions, 4966 flow [2024-06-21 21:50:18,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:18,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:18,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:18,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:50:18,469 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:18,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash 650306936, now seen corresponding path program 4 times [2024-06-21 21:50:18,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:18,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031928506] [2024-06-21 21:50:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:18,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:21,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:21,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031928506] [2024-06-21 21:50:21,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031928506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:21,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:21,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:21,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215267880] [2024-06-21 21:50:21,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:21,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:21,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:21,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:21,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:21,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:21,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 421 transitions, 4966 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:21,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:21,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:21,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:23,929 INFO L124 PetriNetUnfolderBase]: 2926/4813 cut-off events. [2024-06-21 21:50:23,929 INFO L125 PetriNetUnfolderBase]: For 387635/387639 co-relation queries the response was YES. [2024-06-21 21:50:23,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33922 conditions, 4813 events. 2926/4813 cut-off events. For 387635/387639 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29955 event pairs, 593 based on Foata normal form. 4/4816 useless extension candidates. Maximal degree in co-relation 33776. Up to 4099 conditions per place. [2024-06-21 21:50:23,989 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 154 changer transitions 0/472 dead transitions. [2024-06-21 21:50:23,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 472 transitions, 6723 flow [2024-06-21 21:50:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:50:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:50:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 201 transitions. [2024-06-21 21:50:23,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 21:50:23,991 INFO L175 Difference]: Start difference. First operand has 335 places, 421 transitions, 4966 flow. Second operand 12 states and 201 transitions. [2024-06-21 21:50:23,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 472 transitions, 6723 flow [2024-06-21 21:50:25,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 472 transitions, 6508 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-21 21:50:25,523 INFO L231 Difference]: Finished difference. Result has 344 places, 433 transitions, 5296 flow [2024-06-21 21:50:25,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4751, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5296, PETRI_PLACES=344, PETRI_TRANSITIONS=433} [2024-06-21 21:50:25,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 21:50:25,523 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 433 transitions, 5296 flow [2024-06-21 21:50:25,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:25,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:25,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:25,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:50:25,524 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:25,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 650306750, now seen corresponding path program 5 times [2024-06-21 21:50:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:25,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489442428] [2024-06-21 21:50:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:25,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:29,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:29,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489442428] [2024-06-21 21:50:29,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489442428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:29,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:29,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436204176] [2024-06-21 21:50:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:29,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:29,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:29,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:29,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:29,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:29,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 433 transitions, 5296 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:29,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:29,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:29,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:31,247 INFO L124 PetriNetUnfolderBase]: 2931/4822 cut-off events. [2024-06-21 21:50:31,247 INFO L125 PetriNetUnfolderBase]: For 395374/395378 co-relation queries the response was YES. [2024-06-21 21:50:31,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34692 conditions, 4822 events. 2931/4822 cut-off events. For 395374/395378 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29962 event pairs, 610 based on Foata normal form. 3/4824 useless extension candidates. Maximal degree in co-relation 34544. Up to 4300 conditions per place. [2024-06-21 21:50:31,309 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 358 selfloop transitions, 102 changer transitions 0/465 dead transitions. [2024-06-21 21:50:31,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 465 transitions, 6338 flow [2024-06-21 21:50:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:50:31,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:50:31,310 INFO L175 Difference]: Start difference. First operand has 344 places, 433 transitions, 5296 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:50:31,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 465 transitions, 6338 flow [2024-06-21 21:50:32,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 465 transitions, 6088 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-21 21:50:32,943 INFO L231 Difference]: Finished difference. Result has 348 places, 436 transitions, 5304 flow [2024-06-21 21:50:32,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5304, PETRI_PLACES=348, PETRI_TRANSITIONS=436} [2024-06-21 21:50:32,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 21:50:32,944 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 436 transitions, 5304 flow [2024-06-21 21:50:32,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:32,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:32,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:32,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:50:32,945 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:32,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:32,946 INFO L85 PathProgramCache]: Analyzing trace with hash 655549160, now seen corresponding path program 6 times [2024-06-21 21:50:32,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:32,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499372776] [2024-06-21 21:50:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:32,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:36,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:36,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499372776] [2024-06-21 21:50:36,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499372776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:36,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:36,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:36,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527124851] [2024-06-21 21:50:36,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:36,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:36,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:36,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:36,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:36,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:36,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 436 transitions, 5304 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:36,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:36,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:36,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:38,518 INFO L124 PetriNetUnfolderBase]: 2936/4826 cut-off events. [2024-06-21 21:50:38,518 INFO L125 PetriNetUnfolderBase]: For 402537/402539 co-relation queries the response was YES. [2024-06-21 21:50:38,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34797 conditions, 4826 events. 2936/4826 cut-off events. For 402537/402539 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30013 event pairs, 614 based on Foata normal form. 1/4825 useless extension candidates. Maximal degree in co-relation 34647. Up to 4081 conditions per place. [2024-06-21 21:50:38,583 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 171 changer transitions 0/475 dead transitions. [2024-06-21 21:50:38,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 475 transitions, 6898 flow [2024-06-21 21:50:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:50:38,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 21:50:38,584 INFO L175 Difference]: Start difference. First operand has 348 places, 436 transitions, 5304 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:50:38,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 475 transitions, 6898 flow [2024-06-21 21:50:40,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 475 transitions, 6662 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 21:50:40,333 INFO L231 Difference]: Finished difference. Result has 350 places, 439 transitions, 5462 flow [2024-06-21 21:50:40,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5462, PETRI_PLACES=350, PETRI_TRANSITIONS=439} [2024-06-21 21:50:40,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-21 21:50:40,334 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 439 transitions, 5462 flow [2024-06-21 21:50:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:40,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:40,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:50:40,334 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:40,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash 231236860, now seen corresponding path program 1 times [2024-06-21 21:50:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884837145] [2024-06-21 21:50:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:43,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:43,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884837145] [2024-06-21 21:50:43,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884837145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:43,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:43,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225836821] [2024-06-21 21:50:43,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:43,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:43,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:43,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:43,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:43,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:43,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 439 transitions, 5462 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:43,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:43,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:43,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:45,728 INFO L124 PetriNetUnfolderBase]: 2978/4893 cut-off events. [2024-06-21 21:50:45,728 INFO L125 PetriNetUnfolderBase]: For 427170/427176 co-relation queries the response was YES. [2024-06-21 21:50:45,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35443 conditions, 4893 events. 2978/4893 cut-off events. For 427170/427176 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30389 event pairs, 604 based on Foata normal form. 8/4899 useless extension candidates. Maximal degree in co-relation 35292. Up to 4289 conditions per place. [2024-06-21 21:50:45,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 131 changer transitions 0/488 dead transitions. [2024-06-21 21:50:45,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 488 transitions, 7038 flow [2024-06-21 21:50:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:50:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:50:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-21 21:50:45,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948412698412698 [2024-06-21 21:50:45,794 INFO L175 Difference]: Start difference. First operand has 350 places, 439 transitions, 5462 flow. Second operand 12 states and 199 transitions. [2024-06-21 21:50:45,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 488 transitions, 7038 flow [2024-06-21 21:50:47,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 488 transitions, 6648 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 21:50:47,625 INFO L231 Difference]: Finished difference. Result has 355 places, 448 transitions, 5502 flow [2024-06-21 21:50:47,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5072, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5502, PETRI_PLACES=355, PETRI_TRANSITIONS=448} [2024-06-21 21:50:47,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 21:50:47,625 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 448 transitions, 5502 flow [2024-06-21 21:50:47,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:47,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:47,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:47,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:50:47,626 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:47,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash 655847690, now seen corresponding path program 7 times [2024-06-21 21:50:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:47,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028879572] [2024-06-21 21:50:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:47,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:51,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:51,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028879572] [2024-06-21 21:50:51,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028879572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:51,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:51,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:51,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353573353] [2024-06-21 21:50:51,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:51,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:51,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:51,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:51,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:51,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 448 transitions, 5502 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:51,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:51,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:51,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:50:53,529 INFO L124 PetriNetUnfolderBase]: 2983/4905 cut-off events. [2024-06-21 21:50:53,529 INFO L125 PetriNetUnfolderBase]: For 433990/433992 co-relation queries the response was YES. [2024-06-21 21:50:53,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35778 conditions, 4905 events. 2983/4905 cut-off events. For 433990/433992 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30569 event pairs, 625 based on Foata normal form. 1/4904 useless extension candidates. Maximal degree in co-relation 35626. Up to 4145 conditions per place. [2024-06-21 21:50:53,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 173 changer transitions 0/482 dead transitions. [2024-06-21 21:50:53,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 482 transitions, 6930 flow [2024-06-21 21:50:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:50:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:50:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:50:53,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:50:53,593 INFO L175 Difference]: Start difference. First operand has 355 places, 448 transitions, 5502 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:50:53,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 482 transitions, 6930 flow [2024-06-21 21:50:55,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 482 transitions, 6691 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 21:50:55,567 INFO L231 Difference]: Finished difference. Result has 357 places, 451 transitions, 5657 flow [2024-06-21 21:50:55,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5263, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5657, PETRI_PLACES=357, PETRI_TRANSITIONS=451} [2024-06-21 21:50:55,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 21:50:55,568 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 451 transitions, 5657 flow [2024-06-21 21:50:55,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:55,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:50:55,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:50:55,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:50:55,568 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:50:55,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:50:55,568 INFO L85 PathProgramCache]: Analyzing trace with hash 659566760, now seen corresponding path program 8 times [2024-06-21 21:50:55,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:50:55,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740957279] [2024-06-21 21:50:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:50:55,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:50:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:50:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:50:59,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:50:59,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740957279] [2024-06-21 21:50:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740957279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:50:59,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:50:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:50:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990590605] [2024-06-21 21:50:59,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:50:59,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:50:59,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:50:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:50:59,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:50:59,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:50:59,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 451 transitions, 5657 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:50:59,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:50:59,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:50:59,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:01,176 INFO L124 PetriNetUnfolderBase]: 3001/4933 cut-off events. [2024-06-21 21:51:01,176 INFO L125 PetriNetUnfolderBase]: For 447484/447488 co-relation queries the response was YES. [2024-06-21 21:51:01,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36381 conditions, 4933 events. 3001/4933 cut-off events. For 447484/447488 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 30768 event pairs, 613 based on Foata normal form. 3/4935 useless extension candidates. Maximal degree in co-relation 36227. Up to 4381 conditions per place. [2024-06-21 21:51:01,241 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 115 changer transitions 0/486 dead transitions. [2024-06-21 21:51:01,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 486 transitions, 7000 flow [2024-06-21 21:51:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:51:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:51:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:51:01,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:51:01,243 INFO L175 Difference]: Start difference. First operand has 357 places, 451 transitions, 5657 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:51:01,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 486 transitions, 7000 flow [2024-06-21 21:51:03,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 486 transitions, 6667 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 21:51:03,404 INFO L231 Difference]: Finished difference. Result has 361 places, 460 transitions, 5724 flow [2024-06-21 21:51:03,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5724, PETRI_PLACES=361, PETRI_TRANSITIONS=460} [2024-06-21 21:51:03,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-21 21:51:03,404 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 460 transitions, 5724 flow [2024-06-21 21:51:03,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:03,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:03,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:51:03,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:51:03,405 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:03,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash -674204544, now seen corresponding path program 2 times [2024-06-21 21:51:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919978119] [2024-06-21 21:51:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:06,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:06,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919978119] [2024-06-21 21:51:06,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919978119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:06,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:06,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:51:06,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971131897] [2024-06-21 21:51:06,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:06,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:51:06,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:51:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:51:06,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:51:06,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 460 transitions, 5724 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:06,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:06,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:51:06,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:09,182 INFO L124 PetriNetUnfolderBase]: 3027/4972 cut-off events. [2024-06-21 21:51:09,182 INFO L125 PetriNetUnfolderBase]: For 468222/468230 co-relation queries the response was YES. [2024-06-21 21:51:09,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36687 conditions, 4972 events. 3027/4972 cut-off events. For 468222/468230 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 31020 event pairs, 600 based on Foata normal form. 10/4981 useless extension candidates. Maximal degree in co-relation 36531. Up to 4500 conditions per place. [2024-06-21 21:51:09,255 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 410 selfloop transitions, 88 changer transitions 0/503 dead transitions. [2024-06-21 21:51:09,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 503 transitions, 7046 flow [2024-06-21 21:51:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:51:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:51:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-21 21:51:09,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717948717948718 [2024-06-21 21:51:09,257 INFO L175 Difference]: Start difference. First operand has 361 places, 460 transitions, 5724 flow. Second operand 13 states and 203 transitions. [2024-06-21 21:51:09,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 503 transitions, 7046 flow [2024-06-21 21:51:11,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 503 transitions, 6859 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 21:51:11,578 INFO L231 Difference]: Finished difference. Result has 370 places, 466 transitions, 5773 flow [2024-06-21 21:51:11,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5773, PETRI_PLACES=370, PETRI_TRANSITIONS=466} [2024-06-21 21:51:11,579 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 21:51:11,579 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 466 transitions, 5773 flow [2024-06-21 21:51:11,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:11,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:11,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:51:11,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:51:11,580 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:11,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:11,580 INFO L85 PathProgramCache]: Analyzing trace with hash 234961324, now seen corresponding path program 5 times [2024-06-21 21:51:11,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:11,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759359167] [2024-06-21 21:51:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:11,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:14,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:14,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759359167] [2024-06-21 21:51:14,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759359167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:14,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:14,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:51:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974980164] [2024-06-21 21:51:14,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:14,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:51:14,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:51:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:51:14,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:51:14,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 466 transitions, 5773 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:14,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:14,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:51:14,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:16,990 INFO L124 PetriNetUnfolderBase]: 3053/5011 cut-off events. [2024-06-21 21:51:16,990 INFO L125 PetriNetUnfolderBase]: For 486183/486187 co-relation queries the response was YES. [2024-06-21 21:51:17,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37200 conditions, 5011 events. 3053/5011 cut-off events. For 486183/486187 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 31227 event pairs, 599 based on Foata normal form. 4/5014 useless extension candidates. Maximal degree in co-relation 37043. Up to 4261 conditions per place. [2024-06-21 21:51:17,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 157 changer transitions 0/506 dead transitions. [2024-06-21 21:51:17,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 506 transitions, 7477 flow [2024-06-21 21:51:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:51:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:51:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-21 21:51:17,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-21 21:51:17,051 INFO L175 Difference]: Start difference. First operand has 370 places, 466 transitions, 5773 flow. Second operand 11 states and 186 transitions. [2024-06-21 21:51:17,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 506 transitions, 7477 flow [2024-06-21 21:51:19,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 506 transitions, 7359 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 21:51:19,408 INFO L231 Difference]: Finished difference. Result has 372 places, 472 transitions, 6051 flow [2024-06-21 21:51:19,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6051, PETRI_PLACES=372, PETRI_TRANSITIONS=472} [2024-06-21 21:51:19,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-21 21:51:19,409 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 472 transitions, 6051 flow [2024-06-21 21:51:19,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:19,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:19,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:51:19,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:51:19,409 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:19,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:19,410 INFO L85 PathProgramCache]: Analyzing trace with hash 234950164, now seen corresponding path program 6 times [2024-06-21 21:51:19,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:19,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428949373] [2024-06-21 21:51:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:19,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:22,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:22,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428949373] [2024-06-21 21:51:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428949373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:22,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:22,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:51:22,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598273696] [2024-06-21 21:51:22,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:22,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:51:22,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:22,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:51:22,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:51:22,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:51:22,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 472 transitions, 6051 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:22,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:22,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:51:22,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:25,066 INFO L124 PetriNetUnfolderBase]: 3047/5001 cut-off events. [2024-06-21 21:51:25,066 INFO L125 PetriNetUnfolderBase]: For 488849/488853 co-relation queries the response was YES. [2024-06-21 21:51:25,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37495 conditions, 5001 events. 3047/5001 cut-off events. For 488849/488853 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 31228 event pairs, 596 based on Foata normal form. 4/5004 useless extension candidates. Maximal degree in co-relation 37336. Up to 4256 conditions per place. [2024-06-21 21:51:25,127 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 158 changer transitions 0/508 dead transitions. [2024-06-21 21:51:25,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 508 transitions, 7511 flow [2024-06-21 21:51:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:51:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:51:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 210 transitions. [2024-06-21 21:51:25,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-06-21 21:51:25,129 INFO L175 Difference]: Start difference. First operand has 372 places, 472 transitions, 6051 flow. Second operand 13 states and 210 transitions. [2024-06-21 21:51:25,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 508 transitions, 7511 flow [2024-06-21 21:51:26,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 508 transitions, 7198 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 21:51:26,870 INFO L231 Difference]: Finished difference. Result has 378 places, 472 transitions, 6060 flow [2024-06-21 21:51:26,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5738, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6060, PETRI_PLACES=378, PETRI_TRANSITIONS=472} [2024-06-21 21:51:26,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 21:51:26,871 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 472 transitions, 6060 flow [2024-06-21 21:51:26,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:26,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:26,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:51:26,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:51:26,872 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:26,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:26,872 INFO L85 PathProgramCache]: Analyzing trace with hash 234955930, now seen corresponding path program 3 times [2024-06-21 21:51:26,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:26,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665342580] [2024-06-21 21:51:26,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:26,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:30,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:30,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665342580] [2024-06-21 21:51:30,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665342580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:30,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:30,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:51:30,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749495344] [2024-06-21 21:51:30,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:30,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:51:30,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:30,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:51:30,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:51:30,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:51:30,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 472 transitions, 6060 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:30,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:30,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:51:30,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:32,668 INFO L124 PetriNetUnfolderBase]: 3041/4992 cut-off events. [2024-06-21 21:51:32,668 INFO L125 PetriNetUnfolderBase]: For 490034/490042 co-relation queries the response was YES. [2024-06-21 21:51:32,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37346 conditions, 4992 events. 3041/4992 cut-off events. For 490034/490042 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 31153 event pairs, 599 based on Foata normal form. 10/5001 useless extension candidates. Maximal degree in co-relation 37186. Up to 4523 conditions per place. [2024-06-21 21:51:32,727 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 88 changer transitions 0/507 dead transitions. [2024-06-21 21:51:32,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 507 transitions, 7160 flow [2024-06-21 21:51:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:51:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:51:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-21 21:51:32,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37896825396825395 [2024-06-21 21:51:32,728 INFO L175 Difference]: Start difference. First operand has 378 places, 472 transitions, 6060 flow. Second operand 12 states and 191 transitions. [2024-06-21 21:51:32,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 507 transitions, 7160 flow [2024-06-21 21:51:34,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 507 transitions, 6806 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 21:51:34,770 INFO L231 Difference]: Finished difference. Result has 378 places, 472 transitions, 5888 flow [2024-06-21 21:51:34,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5706, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5888, PETRI_PLACES=378, PETRI_TRANSITIONS=472} [2024-06-21 21:51:34,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 21:51:34,771 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 472 transitions, 5888 flow [2024-06-21 21:51:34,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:34,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:34,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:51:34,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:51:34,771 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:34,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 659561180, now seen corresponding path program 9 times [2024-06-21 21:51:34,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:34,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663466280] [2024-06-21 21:51:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:34,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:38,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:38,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663466280] [2024-06-21 21:51:38,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663466280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:38,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:38,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:51:38,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235879240] [2024-06-21 21:51:38,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:38,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:51:38,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:38,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:51:38,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:51:38,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:51:38,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 472 transitions, 5888 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:38,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:38,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:51:38,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:40,619 INFO L124 PetriNetUnfolderBase]: 3038/4997 cut-off events. [2024-06-21 21:51:40,619 INFO L125 PetriNetUnfolderBase]: For 490038/490042 co-relation queries the response was YES. [2024-06-21 21:51:40,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37093 conditions, 4997 events. 3038/4997 cut-off events. For 490038/490042 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 31267 event pairs, 621 based on Foata normal form. 3/4999 useless extension candidates. Maximal degree in co-relation 36932. Up to 4434 conditions per place. [2024-06-21 21:51:40,691 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 116 changer transitions 0/499 dead transitions. [2024-06-21 21:51:40,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 499 transitions, 6948 flow [2024-06-21 21:51:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:51:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:51:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-21 21:51:40,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 21:51:40,692 INFO L175 Difference]: Start difference. First operand has 378 places, 472 transitions, 5888 flow. Second operand 11 states and 176 transitions. [2024-06-21 21:51:40,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 499 transitions, 6948 flow [2024-06-21 21:51:43,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 499 transitions, 6746 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 21:51:43,326 INFO L231 Difference]: Finished difference. Result has 378 places, 472 transitions, 5924 flow [2024-06-21 21:51:43,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5686, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5924, PETRI_PLACES=378, PETRI_TRANSITIONS=472} [2024-06-21 21:51:43,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 21:51:43,327 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 472 transitions, 5924 flow [2024-06-21 21:51:43,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:43,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:43,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:51:43,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:51:43,327 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:43,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:43,329 INFO L85 PathProgramCache]: Analyzing trace with hash -230553006, now seen corresponding path program 4 times [2024-06-21 21:51:43,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:43,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461484467] [2024-06-21 21:51:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:43,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:46,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461484467] [2024-06-21 21:51:46,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461484467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:46,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:46,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:51:46,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794589825] [2024-06-21 21:51:46,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:46,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:51:46,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:51:46,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:51:46,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:51:46,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 472 transitions, 5924 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:46,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:46,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:51:46,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:48,998 INFO L124 PetriNetUnfolderBase]: 3080/5060 cut-off events. [2024-06-21 21:51:48,998 INFO L125 PetriNetUnfolderBase]: For 522464/522472 co-relation queries the response was YES. [2024-06-21 21:51:49,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37890 conditions, 5060 events. 3080/5060 cut-off events. For 522464/522472 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 31696 event pairs, 598 based on Foata normal form. 10/5069 useless extension candidates. Maximal degree in co-relation 37728. Up to 4537 conditions per place. [2024-06-21 21:51:49,071 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 99 changer transitions 0/513 dead transitions. [2024-06-21 21:51:49,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 513 transitions, 7308 flow [2024-06-21 21:51:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:51:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:51:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-21 21:51:49,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:51:49,073 INFO L175 Difference]: Start difference. First operand has 378 places, 472 transitions, 5924 flow. Second operand 12 states and 188 transitions. [2024-06-21 21:51:49,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 513 transitions, 7308 flow [2024-06-21 21:51:51,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 513 transitions, 7057 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:51:51,793 INFO L231 Difference]: Finished difference. Result has 381 places, 481 transitions, 6001 flow [2024-06-21 21:51:51,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5673, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6001, PETRI_PLACES=381, PETRI_TRANSITIONS=481} [2024-06-21 21:51:51,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 21:51:51,794 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 481 transitions, 6001 flow [2024-06-21 21:51:51,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:51,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:51:51,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:51:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:51:51,794 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:51:51,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:51:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash 518174864, now seen corresponding path program 7 times [2024-06-21 21:51:51,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:51:51,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671822287] [2024-06-21 21:51:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:51:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:51:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:51:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:51:55,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:51:55,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671822287] [2024-06-21 21:51:55,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671822287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:51:55,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:51:55,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:51:55,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765099793] [2024-06-21 21:51:55,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:51:55,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:51:55,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:51:55,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:51:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:51:55,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:51:55,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 481 transitions, 6001 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:51:55,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:51:55,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:51:55,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:51:57,773 INFO L124 PetriNetUnfolderBase]: 3111/5099 cut-off events. [2024-06-21 21:51:57,773 INFO L125 PetriNetUnfolderBase]: For 541975/541977 co-relation queries the response was YES. [2024-06-21 21:51:57,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38554 conditions, 5099 events. 3111/5099 cut-off events. For 541975/541977 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 31861 event pairs, 600 based on Foata normal form. 2/5100 useless extension candidates. Maximal degree in co-relation 38390. Up to 4638 conditions per place. [2024-06-21 21:51:57,851 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 69 changer transitions 0/520 dead transitions. [2024-06-21 21:51:57,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 520 transitions, 7435 flow [2024-06-21 21:51:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:51:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:51:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-21 21:51:57,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:51:57,853 INFO L175 Difference]: Start difference. First operand has 381 places, 481 transitions, 6001 flow. Second operand 12 states and 188 transitions. [2024-06-21 21:51:57,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 520 transitions, 7435 flow [2024-06-21 21:52:00,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 520 transitions, 7295 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 21:52:00,599 INFO L231 Difference]: Finished difference. Result has 386 places, 490 transitions, 6170 flow [2024-06-21 21:52:00,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5861, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6170, PETRI_PLACES=386, PETRI_TRANSITIONS=490} [2024-06-21 21:52:00,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 21:52:00,600 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 490 transitions, 6170 flow [2024-06-21 21:52:00,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:00,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:00,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:00,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:52:00,601 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:00,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:00,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1851951934, now seen corresponding path program 10 times [2024-06-21 21:52:00,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:00,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906759295] [2024-06-21 21:52:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:00,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:04,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:04,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906759295] [2024-06-21 21:52:04,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906759295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:04,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:04,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:52:04,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882010620] [2024-06-21 21:52:04,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:04,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:52:04,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:52:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:52:04,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:52:04,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 490 transitions, 6170 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:04,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:04,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:52:04,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:06,357 INFO L124 PetriNetUnfolderBase]: 3116/5102 cut-off events. [2024-06-21 21:52:06,357 INFO L125 PetriNetUnfolderBase]: For 548076/548078 co-relation queries the response was YES. [2024-06-21 21:52:06,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38891 conditions, 5102 events. 3116/5102 cut-off events. For 548076/548078 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 31834 event pairs, 611 based on Foata normal form. 1/5102 useless extension candidates. Maximal degree in co-relation 38724. Up to 4705 conditions per place. [2024-06-21 21:52:06,429 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 457 selfloop transitions, 52 changer transitions 0/514 dead transitions. [2024-06-21 21:52:06,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 514 transitions, 7304 flow [2024-06-21 21:52:06,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:52:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:52:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 21:52:06,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 21:52:06,430 INFO L175 Difference]: Start difference. First operand has 386 places, 490 transitions, 6170 flow. Second operand 9 states and 143 transitions. [2024-06-21 21:52:06,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 514 transitions, 7304 flow [2024-06-21 21:52:08,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 514 transitions, 7196 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 21:52:08,870 INFO L231 Difference]: Finished difference. Result has 387 places, 493 transitions, 6239 flow [2024-06-21 21:52:08,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6062, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6239, PETRI_PLACES=387, PETRI_TRANSITIONS=493} [2024-06-21 21:52:08,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 21:52:08,870 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 493 transitions, 6239 flow [2024-06-21 21:52:08,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:08,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:08,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:08,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:52:08,871 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:08,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1431065754, now seen corresponding path program 5 times [2024-06-21 21:52:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615215606] [2024-06-21 21:52:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:08,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:12,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:12,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615215606] [2024-06-21 21:52:12,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615215606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:12,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:12,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:52:12,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587745107] [2024-06-21 21:52:12,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:12,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:52:12,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:12,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:52:12,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:52:12,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:52:12,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 493 transitions, 6239 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:12,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:12,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:52:12,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:14,707 INFO L124 PetriNetUnfolderBase]: 3126/5124 cut-off events. [2024-06-21 21:52:14,707 INFO L125 PetriNetUnfolderBase]: For 563164/563172 co-relation queries the response was YES. [2024-06-21 21:52:14,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39168 conditions, 5124 events. 3126/5124 cut-off events. For 563164/563172 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 32090 event pairs, 603 based on Foata normal form. 10/5133 useless extension candidates. Maximal degree in co-relation 38999. Up to 4597 conditions per place. [2024-06-21 21:52:14,772 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 424 selfloop transitions, 102 changer transitions 0/531 dead transitions. [2024-06-21 21:52:14,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 531 transitions, 7810 flow [2024-06-21 21:52:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:52:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:52:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2024-06-21 21:52:14,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2024-06-21 21:52:14,774 INFO L175 Difference]: Start difference. First operand has 387 places, 493 transitions, 6239 flow. Second operand 13 states and 204 transitions. [2024-06-21 21:52:14,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 531 transitions, 7810 flow [2024-06-21 21:52:17,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 531 transitions, 7677 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:52:17,182 INFO L231 Difference]: Finished difference. Result has 394 places, 496 transitions, 6355 flow [2024-06-21 21:52:17,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6355, PETRI_PLACES=394, PETRI_TRANSITIONS=496} [2024-06-21 21:52:17,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 21:52:17,182 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 496 transitions, 6355 flow [2024-06-21 21:52:17,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:17,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:17,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:17,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:52:17,183 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:17,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:17,183 INFO L85 PathProgramCache]: Analyzing trace with hash 521899328, now seen corresponding path program 11 times [2024-06-21 21:52:17,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:17,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722859265] [2024-06-21 21:52:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:17,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:20,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:20,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722859265] [2024-06-21 21:52:20,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722859265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:20,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:20,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:52:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121245637] [2024-06-21 21:52:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:52:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:52:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:52:20,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:52:20,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 496 transitions, 6355 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:20,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:20,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:52:20,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:22,843 INFO L124 PetriNetUnfolderBase]: 3157/5183 cut-off events. [2024-06-21 21:52:22,843 INFO L125 PetriNetUnfolderBase]: For 579826/579830 co-relation queries the response was YES. [2024-06-21 21:52:22,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39981 conditions, 5183 events. 3157/5183 cut-off events. For 579826/579830 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32642 event pairs, 628 based on Foata normal form. 3/5185 useless extension candidates. Maximal degree in co-relation 39811. Up to 4567 conditions per place. [2024-06-21 21:52:22,917 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 140 changer transitions 0/535 dead transitions. [2024-06-21 21:52:22,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 535 transitions, 8103 flow [2024-06-21 21:52:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:52:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:52:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:52:22,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-21 21:52:22,919 INFO L175 Difference]: Start difference. First operand has 394 places, 496 transitions, 6355 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:52:22,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 535 transitions, 8103 flow [2024-06-21 21:52:26,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 535 transitions, 7846 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 21:52:26,110 INFO L231 Difference]: Finished difference. Result has 396 places, 511 transitions, 6680 flow [2024-06-21 21:52:26,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6680, PETRI_PLACES=396, PETRI_TRANSITIONS=511} [2024-06-21 21:52:26,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-21 21:52:26,111 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 511 transitions, 6680 flow [2024-06-21 21:52:26,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:26,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:26,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:26,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:52:26,111 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:26,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:26,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1427578068, now seen corresponding path program 8 times [2024-06-21 21:52:26,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:26,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020277930] [2024-06-21 21:52:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:26,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:29,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:29,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020277930] [2024-06-21 21:52:29,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020277930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:29,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:29,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:52:29,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788661507] [2024-06-21 21:52:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:29,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:52:29,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:52:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:52:29,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:52:29,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 511 transitions, 6680 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:29,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:29,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:52:29,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:32,385 INFO L124 PetriNetUnfolderBase]: 3177/5211 cut-off events. [2024-06-21 21:52:32,385 INFO L125 PetriNetUnfolderBase]: For 596243/596245 co-relation queries the response was YES. [2024-06-21 21:52:32,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40245 conditions, 5211 events. 3177/5211 cut-off events. For 596243/596245 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 32757 event pairs, 602 based on Foata normal form. 2/5212 useless extension candidates. Maximal degree in co-relation 40073. Up to 4718 conditions per place. [2024-06-21 21:52:32,461 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 471 selfloop transitions, 75 changer transitions 0/551 dead transitions. [2024-06-21 21:52:32,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 551 transitions, 8156 flow [2024-06-21 21:52:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:52:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:52:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 214 transitions. [2024-06-21 21:52:32,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36394557823129253 [2024-06-21 21:52:32,462 INFO L175 Difference]: Start difference. First operand has 396 places, 511 transitions, 6680 flow. Second operand 14 states and 214 transitions. [2024-06-21 21:52:32,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 551 transitions, 8156 flow [2024-06-21 21:52:34,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 551 transitions, 7942 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 21:52:34,881 INFO L231 Difference]: Finished difference. Result has 406 places, 517 transitions, 6726 flow [2024-06-21 21:52:34,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6470, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6726, PETRI_PLACES=406, PETRI_TRANSITIONS=517} [2024-06-21 21:52:34,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 21:52:34,881 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 517 transitions, 6726 flow [2024-06-21 21:52:34,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:34,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:34,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:34,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:52:34,882 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:34,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:34,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1431071334, now seen corresponding path program 6 times [2024-06-21 21:52:34,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:34,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059666213] [2024-06-21 21:52:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:34,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:38,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:38,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059666213] [2024-06-21 21:52:38,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059666213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:38,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:38,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:52:38,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292571296] [2024-06-21 21:52:38,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:38,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:52:38,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:38,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:52:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:52:38,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:52:38,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 517 transitions, 6726 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:38,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:38,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:52:38,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:40,977 INFO L124 PetriNetUnfolderBase]: 3171/5197 cut-off events. [2024-06-21 21:52:40,977 INFO L125 PetriNetUnfolderBase]: For 598233/598241 co-relation queries the response was YES. [2024-06-21 21:52:41,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39954 conditions, 5197 events. 3171/5197 cut-off events. For 598233/598241 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 32650 event pairs, 603 based on Foata normal form. 10/5206 useless extension candidates. Maximal degree in co-relation 39782. Up to 4663 conditions per place. [2024-06-21 21:52:41,059 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 102 changer transitions 0/555 dead transitions. [2024-06-21 21:52:41,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 555 transitions, 8124 flow [2024-06-21 21:52:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 21:52:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 21:52:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 229 transitions. [2024-06-21 21:52:41,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3634920634920635 [2024-06-21 21:52:41,061 INFO L175 Difference]: Start difference. First operand has 406 places, 517 transitions, 6726 flow. Second operand 15 states and 229 transitions. [2024-06-21 21:52:41,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 555 transitions, 8124 flow [2024-06-21 21:52:43,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 555 transitions, 7936 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-21 21:52:43,780 INFO L231 Difference]: Finished difference. Result has 410 places, 517 transitions, 6748 flow [2024-06-21 21:52:43,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6748, PETRI_PLACES=410, PETRI_TRANSITIONS=517} [2024-06-21 21:52:43,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 21:52:43,781 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 517 transitions, 6748 flow [2024-06-21 21:52:43,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:43,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:43,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:43,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:52:43,781 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:43,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:43,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1438422798, now seen corresponding path program 9 times [2024-06-21 21:52:43,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:43,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375990614] [2024-06-21 21:52:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:43,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:47,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:47,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375990614] [2024-06-21 21:52:47,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375990614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:47,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:47,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:52:47,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913153700] [2024-06-21 21:52:47,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:47,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:52:47,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:47,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:52:47,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:52:47,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:52:47,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 517 transitions, 6748 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:47,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:47,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:52:47,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:49,389 INFO L124 PetriNetUnfolderBase]: 3213/5261 cut-off events. [2024-06-21 21:52:49,389 INFO L125 PetriNetUnfolderBase]: For 630760/630764 co-relation queries the response was YES. [2024-06-21 21:52:49,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40870 conditions, 5261 events. 3213/5261 cut-off events. For 630760/630764 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33061 event pairs, 610 based on Foata normal form. 4/5264 useless extension candidates. Maximal degree in co-relation 40697. Up to 4437 conditions per place. [2024-06-21 21:52:49,464 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 175 changer transitions 0/555 dead transitions. [2024-06-21 21:52:49,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 555 transitions, 8660 flow [2024-06-21 21:52:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:52:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:52:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 21:52:49,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:52:49,465 INFO L175 Difference]: Start difference. First operand has 410 places, 517 transitions, 6748 flow. Second operand 10 states and 170 transitions. [2024-06-21 21:52:49,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 555 transitions, 8660 flow [2024-06-21 21:52:52,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 555 transitions, 8448 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-21 21:52:52,900 INFO L231 Difference]: Finished difference. Result has 406 places, 526 transitions, 7026 flow [2024-06-21 21:52:52,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6536, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7026, PETRI_PLACES=406, PETRI_TRANSITIONS=526} [2024-06-21 21:52:52,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 21:52:52,901 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 526 transitions, 7026 flow [2024-06-21 21:52:52,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:52,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:52:52,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:52:52,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:52:52,901 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:52:52,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:52:52,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1431059802, now seen corresponding path program 12 times [2024-06-21 21:52:52,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:52:52,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691124588] [2024-06-21 21:52:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:52:52,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:52:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:52:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:52:56,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:52:56,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691124588] [2024-06-21 21:52:56,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691124588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:52:56,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:52:56,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:52:56,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238701025] [2024-06-21 21:52:56,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:52:56,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:52:56,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:52:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:52:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:52:56,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:52:56,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 526 transitions, 7026 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:52:56,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:52:56,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:52:56,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:52:58,815 INFO L124 PetriNetUnfolderBase]: 3210/5265 cut-off events. [2024-06-21 21:52:58,815 INFO L125 PetriNetUnfolderBase]: For 632551/632555 co-relation queries the response was YES. [2024-06-21 21:52:58,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41104 conditions, 5265 events. 3210/5265 cut-off events. For 632551/632555 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33147 event pairs, 637 based on Foata normal form. 3/5267 useless extension candidates. Maximal degree in co-relation 40930. Up to 4642 conditions per place. [2024-06-21 21:52:58,895 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 141 changer transitions 0/551 dead transitions. [2024-06-21 21:52:58,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 551 transitions, 8386 flow [2024-06-21 21:52:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:52:58,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:52:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 186 transitions. [2024-06-21 21:52:58,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 21:52:58,896 INFO L175 Difference]: Start difference. First operand has 406 places, 526 transitions, 7026 flow. Second operand 12 states and 186 transitions. [2024-06-21 21:52:58,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 551 transitions, 8386 flow [2024-06-21 21:53:02,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 551 transitions, 8087 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 21:53:02,391 INFO L231 Difference]: Finished difference. Result has 413 places, 526 transitions, 7015 flow [2024-06-21 21:53:02,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6727, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7015, PETRI_PLACES=413, PETRI_TRANSITIONS=526} [2024-06-21 21:53:02,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 21:53:02,391 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 526 transitions, 7015 flow [2024-06-21 21:53:02,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:02,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:02,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:02,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:53:02,392 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:02,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:02,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1431059988, now seen corresponding path program 10 times [2024-06-21 21:53:02,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:02,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677124330] [2024-06-21 21:53:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:02,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:05,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:05,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677124330] [2024-06-21 21:53:05,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677124330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:05,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:05,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:53:05,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16058520] [2024-06-21 21:53:05,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:05,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:53:05,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:05,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:53:05,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:53:05,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:53:05,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 526 transitions, 7015 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:05,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:05,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:53:05,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:08,044 INFO L124 PetriNetUnfolderBase]: 3220/5273 cut-off events. [2024-06-21 21:53:08,044 INFO L125 PetriNetUnfolderBase]: For 650005/650009 co-relation queries the response was YES. [2024-06-21 21:53:08,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41111 conditions, 5273 events. 3220/5273 cut-off events. For 650005/650009 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 33207 event pairs, 611 based on Foata normal form. 4/5276 useless extension candidates. Maximal degree in co-relation 40936. Up to 4443 conditions per place. [2024-06-21 21:53:08,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 371 selfloop transitions, 187 changer transitions 0/563 dead transitions. [2024-06-21 21:53:08,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 563 transitions, 9081 flow [2024-06-21 21:53:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:53:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:53:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 209 transitions. [2024-06-21 21:53:08,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38278388278388276 [2024-06-21 21:53:08,125 INFO L175 Difference]: Start difference. First operand has 413 places, 526 transitions, 7015 flow. Second operand 13 states and 209 transitions. [2024-06-21 21:53:08,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 563 transitions, 9081 flow [2024-06-21 21:53:11,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 563 transitions, 8765 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 21:53:11,168 INFO L231 Difference]: Finished difference. Result has 415 places, 529 transitions, 7123 flow [2024-06-21 21:53:11,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6699, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7123, PETRI_PLACES=415, PETRI_TRANSITIONS=529} [2024-06-21 21:53:11,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 21:53:11,168 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 529 transitions, 7123 flow [2024-06-21 21:53:11,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:11,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:11,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:11,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:53:11,169 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:11,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1431071148, now seen corresponding path program 11 times [2024-06-21 21:53:11,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:11,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162177498] [2024-06-21 21:53:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:11,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:14,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:14,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162177498] [2024-06-21 21:53:14,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162177498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:14,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:14,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:53:14,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037328828] [2024-06-21 21:53:14,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:14,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:53:14,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:53:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:53:14,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:53:14,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 529 transitions, 7123 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:14,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:14,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:53:14,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:16,930 INFO L124 PetriNetUnfolderBase]: 3214/5261 cut-off events. [2024-06-21 21:53:16,930 INFO L125 PetriNetUnfolderBase]: For 652147/652151 co-relation queries the response was YES. [2024-06-21 21:53:16,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41170 conditions, 5261 events. 3214/5261 cut-off events. For 652147/652151 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 33097 event pairs, 607 based on Foata normal form. 4/5264 useless extension candidates. Maximal degree in co-relation 40994. Up to 4438 conditions per place. [2024-06-21 21:53:17,008 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 371 selfloop transitions, 185 changer transitions 0/561 dead transitions. [2024-06-21 21:53:17,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 561 transitions, 8937 flow [2024-06-21 21:53:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:53:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:53:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-21 21:53:17,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39087301587301587 [2024-06-21 21:53:17,011 INFO L175 Difference]: Start difference. First operand has 415 places, 529 transitions, 7123 flow. Second operand 12 states and 197 transitions. [2024-06-21 21:53:17,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 561 transitions, 8937 flow [2024-06-21 21:53:20,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 561 transitions, 8567 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 21:53:20,049 INFO L231 Difference]: Finished difference. Result has 418 places, 529 transitions, 7129 flow [2024-06-21 21:53:20,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7129, PETRI_PLACES=418, PETRI_TRANSITIONS=529} [2024-06-21 21:53:20,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 21:53:20,050 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 529 transitions, 7129 flow [2024-06-21 21:53:20,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:20,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:20,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:20,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:53:20,051 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:20,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash 803660216, now seen corresponding path program 12 times [2024-06-21 21:53:20,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:20,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513921434] [2024-06-21 21:53:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:23,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:23,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513921434] [2024-06-21 21:53:23,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513921434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:23,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:23,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:53:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319110801] [2024-06-21 21:53:23,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:53:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:53:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:53:23,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:53:23,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 529 transitions, 7129 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:23,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:23,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:53:23,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:25,761 INFO L124 PetriNetUnfolderBase]: 3208/5267 cut-off events. [2024-06-21 21:53:25,761 INFO L125 PetriNetUnfolderBase]: For 652188/652190 co-relation queries the response was YES. [2024-06-21 21:53:25,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40972 conditions, 5267 events. 3208/5267 cut-off events. For 652188/652190 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33311 event pairs, 608 based on Foata normal form. 2/5268 useless extension candidates. Maximal degree in co-relation 40795. Up to 4787 conditions per place. [2024-06-21 21:53:25,831 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 489 selfloop transitions, 61 changer transitions 0/555 dead transitions. [2024-06-21 21:53:25,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 555 transitions, 8295 flow [2024-06-21 21:53:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:53:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:53:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-21 21:53:25,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-21 21:53:25,832 INFO L175 Difference]: Start difference. First operand has 418 places, 529 transitions, 7129 flow. Second operand 10 states and 161 transitions. [2024-06-21 21:53:25,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 555 transitions, 8295 flow [2024-06-21 21:53:28,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 555 transitions, 7875 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-21 21:53:28,976 INFO L231 Difference]: Finished difference. Result has 417 places, 529 transitions, 6837 flow [2024-06-21 21:53:28,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6709, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6837, PETRI_PLACES=417, PETRI_TRANSITIONS=529} [2024-06-21 21:53:28,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 21:53:28,977 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 529 transitions, 6837 flow [2024-06-21 21:53:28,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:28,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:28,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:28,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:53:28,977 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:28,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1282600408, now seen corresponding path program 4 times [2024-06-21 21:53:28,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:28,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609158470] [2024-06-21 21:53:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:32,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609158470] [2024-06-21 21:53:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609158470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:32,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:32,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:53:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211050685] [2024-06-21 21:53:32,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:32,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:53:32,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:32,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:53:32,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:53:32,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:53:32,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 529 transitions, 6837 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:32,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:32,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:53:32,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:34,512 INFO L124 PetriNetUnfolderBase]: 3190/5230 cut-off events. [2024-06-21 21:53:34,512 INFO L125 PetriNetUnfolderBase]: For 651297/651303 co-relation queries the response was YES. [2024-06-21 21:53:34,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39629 conditions, 5230 events. 3190/5230 cut-off events. For 651297/651303 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 32781 event pairs, 465 based on Foata normal form. 14/5243 useless extension candidates. Maximal degree in co-relation 39451. Up to 4423 conditions per place. [2024-06-21 21:53:34,592 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 492 selfloop transitions, 78 changer transitions 0/575 dead transitions. [2024-06-21 21:53:34,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 575 transitions, 8157 flow [2024-06-21 21:53:34,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:53:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:53:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 21:53:34,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:53:34,593 INFO L175 Difference]: Start difference. First operand has 417 places, 529 transitions, 6837 flow. Second operand 10 states and 175 transitions. [2024-06-21 21:53:34,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 575 transitions, 8157 flow [2024-06-21 21:53:37,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 575 transitions, 8001 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 21:53:37,785 INFO L231 Difference]: Finished difference. Result has 417 places, 529 transitions, 6847 flow [2024-06-21 21:53:37,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6681, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6847, PETRI_PLACES=417, PETRI_TRANSITIONS=529} [2024-06-21 21:53:37,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 21:53:37,786 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 529 transitions, 6847 flow [2024-06-21 21:53:37,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:37,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:37,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:37,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:53:37,786 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:37,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:37,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1364118886, now seen corresponding path program 13 times [2024-06-21 21:53:37,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:37,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974824853] [2024-06-21 21:53:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:37,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:41,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974824853] [2024-06-21 21:53:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974824853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:41,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:41,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:53:41,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527109109] [2024-06-21 21:53:41,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:41,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:53:41,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:53:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:53:41,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:53:41,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 529 transitions, 6847 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:41,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:41,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:53:41,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:43,830 INFO L124 PetriNetUnfolderBase]: 3211/5266 cut-off events. [2024-06-21 21:53:43,830 INFO L125 PetriNetUnfolderBase]: For 635716/635724 co-relation queries the response was YES. [2024-06-21 21:53:43,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40399 conditions, 5266 events. 3211/5266 cut-off events. For 635716/635724 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 33233 event pairs, 635 based on Foata normal form. 2/5262 useless extension candidates. Maximal degree in co-relation 40220. Up to 4438 conditions per place. [2024-06-21 21:53:43,910 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 206 changer transitions 0/571 dead transitions. [2024-06-21 21:53:43,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 571 transitions, 8909 flow [2024-06-21 21:53:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:53:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:53:43,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:53:43,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:53:43,911 INFO L175 Difference]: Start difference. First operand has 417 places, 529 transitions, 6847 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:53:43,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 571 transitions, 8909 flow [2024-06-21 21:53:47,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 571 transitions, 8758 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 21:53:47,800 INFO L231 Difference]: Finished difference. Result has 418 places, 538 transitions, 7330 flow [2024-06-21 21:53:47,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7330, PETRI_PLACES=418, PETRI_TRANSITIONS=538} [2024-06-21 21:53:47,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 21:53:47,800 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 538 transitions, 7330 flow [2024-06-21 21:53:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:47,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:47,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:47,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:53:47,801 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:47,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:47,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1865330452, now seen corresponding path program 14 times [2024-06-21 21:53:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:47,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677067488] [2024-06-21 21:53:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:47,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:53:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:53:51,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:53:51,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677067488] [2024-06-21 21:53:51,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677067488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:53:51,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:53:51,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:53:51,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045164670] [2024-06-21 21:53:51,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:53:51,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:53:51,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:53:51,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:53:51,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:53:51,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:53:51,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 538 transitions, 7330 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:51,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:53:51,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:53:51,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:53:53,790 INFO L124 PetriNetUnfolderBase]: 3221/5276 cut-off events. [2024-06-21 21:53:53,790 INFO L125 PetriNetUnfolderBase]: For 614594/614602 co-relation queries the response was YES. [2024-06-21 21:53:53,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40526 conditions, 5276 events. 3221/5276 cut-off events. For 614594/614602 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 33178 event pairs, 633 based on Foata normal form. 2/5272 useless extension candidates. Maximal degree in co-relation 40347. Up to 4698 conditions per place. [2024-06-21 21:53:53,873 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 117 changer transitions 0/570 dead transitions. [2024-06-21 21:53:53,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 570 transitions, 8629 flow [2024-06-21 21:53:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:53:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:53:53,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:53:53,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:53:53,875 INFO L175 Difference]: Start difference. First operand has 418 places, 538 transitions, 7330 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:53:53,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 570 transitions, 8629 flow [2024-06-21 21:53:57,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 570 transitions, 7973 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-21 21:53:57,833 INFO L231 Difference]: Finished difference. Result has 420 places, 544 transitions, 7017 flow [2024-06-21 21:53:57,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6694, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7017, PETRI_PLACES=420, PETRI_TRANSITIONS=544} [2024-06-21 21:53:57,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-21 21:53:57,834 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 544 transitions, 7017 flow [2024-06-21 21:53:57,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:53:57,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:53:57,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:53:57,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:53:57,834 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:53:57,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:53:57,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1411211848, now seen corresponding path program 15 times [2024-06-21 21:53:57,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:53:57,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851712788] [2024-06-21 21:53:57,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:53:57,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:53:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:00,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851712788] [2024-06-21 21:54:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851712788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:00,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:00,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:00,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689440031] [2024-06-21 21:54:00,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:00,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:01,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:54:01,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 544 transitions, 7017 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:01,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:01,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:54:01,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:03,498 INFO L124 PetriNetUnfolderBase]: 3234/5312 cut-off events. [2024-06-21 21:54:03,498 INFO L125 PetriNetUnfolderBase]: For 628065/628073 co-relation queries the response was YES. [2024-06-21 21:54:03,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40341 conditions, 5312 events. 3234/5312 cut-off events. For 628065/628073 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 33592 event pairs, 641 based on Foata normal form. 2/5308 useless extension candidates. Maximal degree in co-relation 40162. Up to 4463 conditions per place. [2024-06-21 21:54:03,565 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 231 changer transitions 0/582 dead transitions. [2024-06-21 21:54:03,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 582 transitions, 8787 flow [2024-06-21 21:54:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:54:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:54:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:54:03,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 21:54:03,567 INFO L175 Difference]: Start difference. First operand has 420 places, 544 transitions, 7017 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:54:03,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 582 transitions, 8787 flow [2024-06-21 21:54:06,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 582 transitions, 8525 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:06,898 INFO L231 Difference]: Finished difference. Result has 423 places, 550 transitions, 7327 flow [2024-06-21 21:54:06,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7327, PETRI_PLACES=423, PETRI_TRANSITIONS=550} [2024-06-21 21:54:06,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-21 21:54:06,898 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 550 transitions, 7327 flow [2024-06-21 21:54:06,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:06,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:06,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:06,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:54:06,898 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:06,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:06,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1665849730, now seen corresponding path program 7 times [2024-06-21 21:54:06,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:06,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458279377] [2024-06-21 21:54:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:06,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:10,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458279377] [2024-06-21 21:54:10,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458279377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:10,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:10,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:10,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638832809] [2024-06-21 21:54:10,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:10,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:54:10,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 550 transitions, 7327 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:10,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:10,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:54:10,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:12,423 INFO L124 PetriNetUnfolderBase]: 3260/5347 cut-off events. [2024-06-21 21:54:12,423 INFO L125 PetriNetUnfolderBase]: For 654951/654970 co-relation queries the response was YES. [2024-06-21 21:54:12,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40826 conditions, 5347 events. 3260/5347 cut-off events. For 654951/654970 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 33820 event pairs, 618 based on Foata normal form. 16/5360 useless extension candidates. Maximal degree in co-relation 40646. Up to 4802 conditions per place. [2024-06-21 21:54:12,507 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 478 selfloop transitions, 105 changer transitions 0/588 dead transitions. [2024-06-21 21:54:12,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 588 transitions, 8875 flow [2024-06-21 21:54:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:54:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:54:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-21 21:54:12,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 21:54:12,508 INFO L175 Difference]: Start difference. First operand has 423 places, 550 transitions, 7327 flow. Second operand 10 states and 165 transitions. [2024-06-21 21:54:12,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 588 transitions, 8875 flow [2024-06-21 21:54:15,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 588 transitions, 8505 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 21:54:15,972 INFO L231 Difference]: Finished difference. Result has 428 places, 556 transitions, 7255 flow [2024-06-21 21:54:15,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6957, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7255, PETRI_PLACES=428, PETRI_TRANSITIONS=556} [2024-06-21 21:54:15,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 21:54:15,973 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 556 transitions, 7255 flow [2024-06-21 21:54:15,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:15,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:15,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:15,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:54:15,973 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:15,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash 666428412, now seen corresponding path program 16 times [2024-06-21 21:54:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:15,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982735865] [2024-06-21 21:54:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:15,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:19,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:19,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982735865] [2024-06-21 21:54:19,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982735865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:19,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:19,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:19,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886625554] [2024-06-21 21:54:19,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:19,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:19,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:19,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:54:19,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 556 transitions, 7255 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:19,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:19,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:54:19,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:22,017 INFO L124 PetriNetUnfolderBase]: 3265/5361 cut-off events. [2024-06-21 21:54:22,017 INFO L125 PetriNetUnfolderBase]: For 659890/659898 co-relation queries the response was YES. [2024-06-21 21:54:22,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40717 conditions, 5361 events. 3265/5361 cut-off events. For 659890/659898 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33957 event pairs, 644 based on Foata normal form. 2/5357 useless extension candidates. Maximal degree in co-relation 40536. Up to 4505 conditions per place. [2024-06-21 21:54:22,106 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 372 selfloop transitions, 216 changer transitions 0/593 dead transitions. [2024-06-21 21:54:22,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 593 transitions, 9438 flow [2024-06-21 21:54:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:54:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:54:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 21:54:22,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 21:54:22,107 INFO L175 Difference]: Start difference. First operand has 428 places, 556 transitions, 7255 flow. Second operand 9 states and 164 transitions. [2024-06-21 21:54:22,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 593 transitions, 9438 flow [2024-06-21 21:54:25,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 593 transitions, 9275 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:54:25,708 INFO L231 Difference]: Finished difference. Result has 431 places, 559 transitions, 7581 flow [2024-06-21 21:54:25,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7092, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7581, PETRI_PLACES=431, PETRI_TRANSITIONS=559} [2024-06-21 21:54:25,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-21 21:54:25,709 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 559 transitions, 7581 flow [2024-06-21 21:54:25,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:25,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:25,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:25,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:54:25,709 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:25,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1495693920, now seen corresponding path program 8 times [2024-06-21 21:54:25,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:25,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462375741] [2024-06-21 21:54:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:25,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:29,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462375741] [2024-06-21 21:54:29,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462375741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:29,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:29,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:29,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165143503] [2024-06-21 21:54:29,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:29,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:29,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:29,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:54:29,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 559 transitions, 7581 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:29,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:29,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:54:29,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:31,615 INFO L124 PetriNetUnfolderBase]: 3275/5374 cut-off events. [2024-06-21 21:54:31,615 INFO L125 PetriNetUnfolderBase]: For 678705/678724 co-relation queries the response was YES. [2024-06-21 21:54:31,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41370 conditions, 5374 events. 3275/5374 cut-off events. For 678705/678724 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34053 event pairs, 616 based on Foata normal form. 16/5387 useless extension candidates. Maximal degree in co-relation 41187. Up to 4767 conditions per place. [2024-06-21 21:54:31,690 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 473 selfloop transitions, 119 changer transitions 0/597 dead transitions. [2024-06-21 21:54:31,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 597 transitions, 9343 flow [2024-06-21 21:54:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:54:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:54:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-21 21:54:31,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2024-06-21 21:54:31,692 INFO L175 Difference]: Start difference. First operand has 431 places, 559 transitions, 7581 flow. Second operand 11 states and 181 transitions. [2024-06-21 21:54:31,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 597 transitions, 9343 flow [2024-06-21 21:54:35,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 597 transitions, 8715 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:54:35,903 INFO L231 Difference]: Finished difference. Result has 434 places, 562 transitions, 7241 flow [2024-06-21 21:54:35,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6953, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7241, PETRI_PLACES=434, PETRI_TRANSITIONS=562} [2024-06-21 21:54:35,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 21:54:35,903 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 562 transitions, 7241 flow [2024-06-21 21:54:35,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:35,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:35,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:35,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:54:35,904 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:35,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1859789512, now seen corresponding path program 17 times [2024-06-21 21:54:35,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:35,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594068023] [2024-06-21 21:54:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:35,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:39,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:39,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594068023] [2024-06-21 21:54:39,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594068023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:39,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:39,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:39,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842771234] [2024-06-21 21:54:39,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:39,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:54:39,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 562 transitions, 7241 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:39,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:39,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:54:39,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:54:41,604 INFO L124 PetriNetUnfolderBase]: 3280/5384 cut-off events. [2024-06-21 21:54:41,604 INFO L125 PetriNetUnfolderBase]: For 682040/682048 co-relation queries the response was YES. [2024-06-21 21:54:41,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41159 conditions, 5384 events. 3280/5384 cut-off events. For 682040/682048 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34154 event pairs, 644 based on Foata normal form. 2/5380 useless extension candidates. Maximal degree in co-relation 40975. Up to 4525 conditions per place. [2024-06-21 21:54:41,688 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 372 selfloop transitions, 217 changer transitions 0/594 dead transitions. [2024-06-21 21:54:41,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 594 transitions, 9205 flow [2024-06-21 21:54:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:54:41,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:54:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:54:41,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:54:41,689 INFO L175 Difference]: Start difference. First operand has 434 places, 562 transitions, 7241 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:54:41,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 594 transitions, 9205 flow [2024-06-21 21:54:46,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 594 transitions, 8819 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-21 21:54:46,073 INFO L231 Difference]: Finished difference. Result has 433 places, 565 transitions, 7343 flow [2024-06-21 21:54:46,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6855, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7343, PETRI_PLACES=433, PETRI_TRANSITIONS=565} [2024-06-21 21:54:46,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-21 21:54:46,073 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 565 transitions, 7343 flow [2024-06-21 21:54:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:46,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:54:46,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:54:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:54:46,074 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:54:46,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:54:46,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1411510378, now seen corresponding path program 18 times [2024-06-21 21:54:46,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:54:46,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240315439] [2024-06-21 21:54:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:54:46,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:54:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:54:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:54:49,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:54:49,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240315439] [2024-06-21 21:54:49,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240315439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:54:49,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:54:49,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:54:49,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725167356] [2024-06-21 21:54:49,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:54:49,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:54:49,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:54:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:54:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:54:49,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 21:54:49,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 565 transitions, 7343 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:54:49,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:54:49,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 21:54:49,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15