./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe028_rmo.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/safe028_rmo.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe028_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 22:08:16,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 22:08:17,052 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 22:08:17,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 22:08:17,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 22:08:17,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 22:08:17,099 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 22:08:17,099 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 22:08:17,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 22:08:17,103 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 22:08:17,103 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 22:08:17,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 22:08:17,104 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 22:08:17,105 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 22:08:17,106 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 22:08:17,106 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 22:08:17,106 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 22:08:17,106 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 22:08:17,106 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 22:08:17,107 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 22:08:17,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 22:08:17,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 22:08:17,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 22:08:17,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 22:08:17,108 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 22:08:17,108 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 22:08:17,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 22:08:17,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 22:08:17,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 22:08:17,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 22:08:17,110 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 22:08:17,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 22:08:17,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:08:17,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 22:08:17,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 22:08:17,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 22:08:17,111 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 22:08:17,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 22:08:17,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 22:08:17,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 22:08:17,112 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 22:08:17,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 22:08:17,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 22:08:17,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 22:08:17,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 22:08:17,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 22:08:17,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 22:08:17,339 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 22:08:17,340 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 22:08:17,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe028_rmo.yml/witness.yml [2024-06-21 22:08:17,572 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 22:08:17,572 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 22:08:17,573 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-21 22:08:18,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 22:08:18,822 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 22:08:18,822 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_rmo.i [2024-06-21 22:08:18,842 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4758d6253/7191e4f80ccb47899f574c0bfff52164/FLAGbe492e181 [2024-06-21 22:08:18,852 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4758d6253/7191e4f80ccb47899f574c0bfff52164 [2024-06-21 22:08:18,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 22:08:18,855 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 22:08:18,856 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 22:08:18,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 22:08:18,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 22:08:18,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:17" (1/2) ... [2024-06-21 22:08:18,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb857f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:18, skipping insertion in model container [2024-06-21 22:08:18,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:17" (1/2) ... [2024-06-21 22:08:18,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@678aea3d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:18, skipping insertion in model container [2024-06-21 22:08:18,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:08:18" (2/2) ... [2024-06-21 22:08:18,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb857f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:18, skipping insertion in model container [2024-06-21 22:08:18,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:08:18" (2/2) ... [2024-06-21 22:08:18,867 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 22:08:18,977 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 22:08:18,978 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 22:08:18,978 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 22:08:18,979 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((! multithreaded || x$w_buff0_used == (_Bool)0) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && x$w_buff0 == 0) && x$w_buff0_used == (_Bool)0) && x$w_buff1 == 0) && x$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0) [2024-06-21 22:08:18,979 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 22:08:18,979 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-21 22:08:19,016 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 22:08:19,328 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:08:19,335 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 22:08:19,466 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:08:19,495 INFO L206 MainTranslator]: Completed translation [2024-06-21 22:08:19,495 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19 WrapperNode [2024-06-21 22:08:19,495 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 22:08:19,496 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 22:08:19,496 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 22:08:19,496 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 22:08:19,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,531 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,574 INFO L138 Inliner]: procedures = 175, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 208 [2024-06-21 22:08:19,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 22:08:19,578 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 22:08:19,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 22:08:19,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 22:08:19,587 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,603 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,622 INFO L175 MemorySlicer]: Split 47 memory accesses to 2 slices as follows [2, 45]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-21 22:08:19,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,642 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 22:08:19,642 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 22:08:19,643 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 22:08:19,643 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 22:08:19,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (1/1) ... [2024-06-21 22:08:19,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:08:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 22:08:19,665 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 22:08:19,683 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 22:08:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 22:08:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 22:08:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 22:08:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 22:08:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 22:08:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 22:08:19,695 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 22:08:19,696 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 22:08:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 22:08:19,696 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 22:08:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 22:08:19,696 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 22:08:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 22:08:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 22:08:19,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 22:08:19,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 22:08:19,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 22:08:19,698 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 22:08:19,810 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 22:08:19,812 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 22:08:20,244 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 22:08:20,244 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 22:08:20,600 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 22:08:20,601 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 22:08:20,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:08:20 BoogieIcfgContainer [2024-06-21 22:08:20,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 22:08:20,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 22:08:20,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 22:08:20,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 22:08:20,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:17" (1/4) ... [2024-06-21 22:08:20,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4008d73f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:08:20, skipping insertion in model container [2024-06-21 22:08:20,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 10:08:18" (2/4) ... [2024-06-21 22:08:20,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4008d73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:08:20, skipping insertion in model container [2024-06-21 22:08:20,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:19" (3/4) ... [2024-06-21 22:08:20,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4008d73f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:08:20, skipping insertion in model container [2024-06-21 22:08:20,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:08:20" (4/4) ... [2024-06-21 22:08:20,609 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_rmo.i [2024-06-21 22:08:20,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 22:08:20,623 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 22:08:20,623 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 22:08:20,677 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 22:08:20,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 22:08:20,732 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 22:08:20,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:08:20,734 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 54 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 22:08:20,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 22:08:20,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 22:08:20,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 22:08:20,802 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;@3acefa95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 22:08:20,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 22:08:20,807 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 22:08:20,807 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 22:08:20,808 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:08:20,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:20,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 22:08:20,842 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 22:08:20,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 759262365, now seen corresponding path program 1 times [2024-06-21 22:08:20,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:20,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825336953] [2024-06-21 22:08:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:22,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:22,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825336953] [2024-06-21 22:08:22,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825336953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:22,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:22,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 22:08:22,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042046519] [2024-06-21 22:08:22,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:22,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:08:22,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:08:22,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:08:22,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 22:08:22,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:22,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:22,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 22:08:22,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:23,106 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-21 22:08:23,106 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 22:08:23,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7699 event pairs, 650 based on Foata normal form. 1/1558 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-21 22:08:23,121 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 22:08:23,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-21 22:08:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:08:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:08:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-21 22:08:23,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-21 22:08:23,133 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-21 22:08:23,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-21 22:08:23,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:23,140 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 22:08:23,142 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 22:08:23,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 22:08:23,145 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 22:08:23,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:23,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:23,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:23,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 22:08:23,146 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 22:08:23,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash -492950362, now seen corresponding path program 1 times [2024-06-21 22:08:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:23,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080751921] [2024-06-21 22:08:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:23,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:24,440 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 22:08:24,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:24,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080751921] [2024-06-21 22:08:24,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080751921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:24,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:24,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 22:08:24,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056234304] [2024-06-21 22:08:24,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:24,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 22:08:24,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:24,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 22:08:24,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 22:08:24,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:24,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:24,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:24,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:24,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:24,833 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-21 22:08:24,833 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-21 22:08:24,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1764 events. 1148/1764 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8218 event pairs, 521 based on Foata normal form. 6/1769 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-21 22:08:24,840 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-21 22:08:24,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-21 22:08:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 22:08:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 22:08:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-21 22:08:24,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 22:08:24,842 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-21 22:08:24,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-21 22:08:24,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 22:08:24,844 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 22:08:24,844 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 22:08:24,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 22:08:24,845 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 22:08:24,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:24,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:24,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:24,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 22:08:24,846 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 22:08:24,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:24,846 INFO L85 PathProgramCache]: Analyzing trace with hash -617306588, now seen corresponding path program 1 times [2024-06-21 22:08:24,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:24,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94226201] [2024-06-21 22:08:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:24,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:27,266 INFO 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 22:08:27,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:27,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94226201] [2024-06-21 22:08:27,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94226201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:27,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:27,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:08:27,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39186904] [2024-06-21 22:08:27,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:27,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:08:27,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:27,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:08:27,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:08:27,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:27,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:27,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:27,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:27,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:27,928 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-21 22:08:27,929 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-21 22:08:27,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1749 events. 1139/1749 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8141 event pairs, 375 based on Foata normal form. 6/1754 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-21 22:08:27,938 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 22:08:27,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-21 22:08:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:27,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 22:08:27,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-21 22:08:27,943 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-21 22:08:27,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-21 22:08:27,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 22:08:27,946 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 22:08:27,947 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 22:08:27,948 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 22:08:27,948 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 22:08:27,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:27,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:27,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:27,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 22:08:27,949 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 22:08:27,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:27,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1360734269, now seen corresponding path program 1 times [2024-06-21 22:08:27,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:27,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006980827] [2024-06-21 22:08:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:27,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:29,366 INFO 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 22:08:29,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006980827] [2024-06-21 22:08:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006980827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:29,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:29,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:08:29,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121848047] [2024-06-21 22:08:29,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:29,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:08:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:29,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:08:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:08:29,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:29,400 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 22:08:29,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:29,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:29,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:30,187 INFO L124 PetriNetUnfolderBase]: 959/1558 cut-off events. [2024-06-21 22:08:30,187 INFO L125 PetriNetUnfolderBase]: For 1579/1579 co-relation queries the response was YES. [2024-06-21 22:08:30,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4320 conditions, 1558 events. 959/1558 cut-off events. For 1579/1579 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7517 event pairs, 367 based on Foata normal form. 4/1561 useless extension candidates. Maximal degree in co-relation 4303. Up to 1434 conditions per place. [2024-06-21 22:08:30,196 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-21 22:08:30,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 341 flow [2024-06-21 22:08:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:08:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:08:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-21 22:08:30,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 22:08:30,198 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 94 transitions. [2024-06-21 22:08:30,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 341 flow [2024-06-21 22:08:30,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:30,203 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 22:08:30,204 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 22:08:30,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 22:08:30,205 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 22:08:30,205 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 22:08:30,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:30,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:30,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 22:08:30,206 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 22:08:30,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1900309014, now seen corresponding path program 1 times [2024-06-21 22:08:30,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:30,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332116762] [2024-06-21 22:08:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:30,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:31,918 INFO 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 22:08:31,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:31,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332116762] [2024-06-21 22:08:31,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332116762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:31,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:31,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:31,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783811090] [2024-06-21 22:08:31,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:31,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:31,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:31,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:31,939 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 22:08:31,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:31,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:31,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:32,964 INFO L124 PetriNetUnfolderBase]: 1155/1787 cut-off events. [2024-06-21 22:08:32,964 INFO L125 PetriNetUnfolderBase]: For 2717/2719 co-relation queries the response was YES. [2024-06-21 22:08:32,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 1787 events. 1155/1787 cut-off events. For 2717/2719 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8340 event pairs, 420 based on Foata normal form. 6/1792 useless extension candidates. Maximal degree in co-relation 5411. Up to 1642 conditions per place. [2024-06-21 22:08:32,973 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-21 22:08:32,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 466 flow [2024-06-21 22:08:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 22:08:32,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 22:08:32,975 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 116 transitions. [2024-06-21 22:08:32,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 466 flow [2024-06-21 22:08:32,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 446 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:32,977 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 260 flow [2024-06-21 22:08:32,978 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=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-21 22:08:32,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 22:08:32,978 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 260 flow [2024-06-21 22:08:32,978 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 22:08:32,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:32,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:32,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 22:08:32,979 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 22:08:32,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1918968534, now seen corresponding path program 2 times [2024-06-21 22:08:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:32,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737672793] [2024-06-21 22:08:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:34,732 INFO 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 22:08:34,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:34,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737672793] [2024-06-21 22:08:34,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737672793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:34,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:34,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:34,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577980788] [2024-06-21 22:08:34,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:34,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:34,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:34,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:34,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 260 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 22:08:34,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:34,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:34,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:35,666 INFO L124 PetriNetUnfolderBase]: 1145/1764 cut-off events. [2024-06-21 22:08:35,666 INFO L125 PetriNetUnfolderBase]: For 3870/3870 co-relation queries the response was YES. [2024-06-21 22:08:35,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5819 conditions, 1764 events. 1145/1764 cut-off events. For 3870/3870 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8237 event pairs, 419 based on Foata normal form. 4/1765 useless extension candidates. Maximal degree in co-relation 5799. Up to 1634 conditions per place. [2024-06-21 22:08:35,676 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/73 dead transitions. [2024-06-21 22:08:35,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 446 flow [2024-06-21 22:08:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 22:08:35,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 22:08:35,677 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 260 flow. Second operand 6 states and 109 transitions. [2024-06-21 22:08:35,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 446 flow [2024-06-21 22:08:35,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 416 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-21 22:08:35,682 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 270 flow [2024-06-21 22:08:35,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-21 22:08:35,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 22:08:35,685 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 270 flow [2024-06-21 22:08:35,685 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 22:08:35,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:35,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:35,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 22:08:35,686 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 22:08:35,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1995614876, now seen corresponding path program 1 times [2024-06-21 22:08:35,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:35,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399436489] [2024-06-21 22:08:35,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:35,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399436489] [2024-06-21 22:08:38,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399436489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:38,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:38,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614133076] [2024-06-21 22:08:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:38,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:38,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 270 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 22:08:38,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:38,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:38,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:39,235 INFO L124 PetriNetUnfolderBase]: 967/1578 cut-off events. [2024-06-21 22:08:39,236 INFO L125 PetriNetUnfolderBase]: For 3797/3797 co-relation queries the response was YES. [2024-06-21 22:08:39,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5179 conditions, 1578 events. 967/1578 cut-off events. For 3797/3797 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7633 event pairs, 333 based on Foata normal form. 4/1581 useless extension candidates. Maximal degree in co-relation 5157. Up to 1424 conditions per place. [2024-06-21 22:08:39,245 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-21 22:08:39,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 476 flow [2024-06-21 22:08:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 22:08:39,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 22:08:39,247 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 270 flow. Second operand 6 states and 111 transitions. [2024-06-21 22:08:39,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 476 flow [2024-06-21 22:08:39,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 432 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:39,251 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 275 flow [2024-06-21 22:08:39,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-21 22:08:39,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 22:08:39,253 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 275 flow [2024-06-21 22:08:39,253 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 22:08:39,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:39,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:39,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 22:08:39,254 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 22:08:39,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:39,254 INFO L85 PathProgramCache]: Analyzing trace with hash 831133461, now seen corresponding path program 1 times [2024-06-21 22:08:39,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:39,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872858050] [2024-06-21 22:08:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:41,806 INFO 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 22:08:41,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:41,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872858050] [2024-06-21 22:08:41,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872858050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:41,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:41,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658258557] [2024-06-21 22:08:41,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:41,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:41,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:41,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:41,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:41,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:41,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 275 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 22:08:41,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:41,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:41,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:42,878 INFO L124 PetriNetUnfolderBase]: 1163/1803 cut-off events. [2024-06-21 22:08:42,878 INFO L125 PetriNetUnfolderBase]: For 5839/5839 co-relation queries the response was YES. [2024-06-21 22:08:42,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6230 conditions, 1803 events. 1163/1803 cut-off events. For 5839/5839 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8464 event pairs, 436 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 6208. Up to 1691 conditions per place. [2024-06-21 22:08:42,892 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-06-21 22:08:42,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 549 flow [2024-06-21 22:08:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:42,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:42,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 22:08:42,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 22:08:42,896 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 275 flow. Second operand 7 states and 130 transitions. [2024-06-21 22:08:42,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 549 flow [2024-06-21 22:08:42,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 518 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:42,900 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 310 flow [2024-06-21 22:08:42,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-21 22:08:42,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-21 22:08:42,903 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 310 flow [2024-06-21 22:08:42,903 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 22:08:42,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:42,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:42,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 22:08:42,904 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 22:08:42,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash 200765167, now seen corresponding path program 2 times [2024-06-21 22:08:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:42,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137713427] [2024-06-21 22:08:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:45,285 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 22:08:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137713427] [2024-06-21 22:08:45,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137713427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:45,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:45,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:45,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443830565] [2024-06-21 22:08:45,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:45,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:45,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:45,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:45,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:45,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 310 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 22:08:45,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:45,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:45,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:46,321 INFO L124 PetriNetUnfolderBase]: 1189/1861 cut-off events. [2024-06-21 22:08:46,322 INFO L125 PetriNetUnfolderBase]: For 7661/7665 co-relation queries the response was YES. [2024-06-21 22:08:46,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6806 conditions, 1861 events. 1189/1861 cut-off events. For 7661/7665 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8868 event pairs, 380 based on Foata normal form. 8/1868 useless extension candidates. Maximal degree in co-relation 6783. Up to 1595 conditions per place. [2024-06-21 22:08:46,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 22:08:46,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 97 transitions, 666 flow [2024-06-21 22:08:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 22:08:46,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 22:08:46,338 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 310 flow. Second operand 7 states and 135 transitions. [2024-06-21 22:08:46,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 97 transitions, 666 flow [2024-06-21 22:08:46,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 624 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:46,345 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 394 flow [2024-06-21 22:08:46,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-21 22:08:46,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 22:08:46,346 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 394 flow [2024-06-21 22:08:46,347 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 22:08:46,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:46,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:46,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 22:08:46,349 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 22:08:46,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:46,350 INFO L85 PathProgramCache]: Analyzing trace with hash 835902005, now seen corresponding path program 1 times [2024-06-21 22:08:46,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609000169] [2024-06-21 22:08:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:46,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:49,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:49,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609000169] [2024-06-21 22:08:49,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609000169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:49,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:49,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:49,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570004439] [2024-06-21 22:08:49,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:49,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:49,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:49,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:49,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 394 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 22:08:49,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:49,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:49,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:50,420 INFO L124 PetriNetUnfolderBase]: 1209/1893 cut-off events. [2024-06-21 22:08:50,421 INFO L125 PetriNetUnfolderBase]: For 9936/9940 co-relation queries the response was YES. [2024-06-21 22:08:50,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7360 conditions, 1893 events. 1209/1893 cut-off events. For 9936/9940 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9075 event pairs, 391 based on Foata normal form. 8/1900 useless extension candidates. Maximal degree in co-relation 7336. Up to 1708 conditions per place. [2024-06-21 22:08:50,429 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 74 selfloop transitions, 18 changer transitions 0/97 dead transitions. [2024-06-21 22:08:50,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 97 transitions, 676 flow [2024-06-21 22:08:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 22:08:50,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 22:08:50,431 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 394 flow. Second operand 7 states and 130 transitions. [2024-06-21 22:08:50,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 97 transitions, 676 flow [2024-06-21 22:08:50,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 636 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:50,438 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 423 flow [2024-06-21 22:08:50,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=423, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-21 22:08:50,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 22:08:50,439 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 423 flow [2024-06-21 22:08:50,439 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 22:08:50,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:50,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:50,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 22:08:50,440 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 22:08:50,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1290272035, now seen corresponding path program 3 times [2024-06-21 22:08:50,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027101778] [2024-06-21 22:08:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:50,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:52,661 INFO 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 22:08:52,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:52,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027101778] [2024-06-21 22:08:52,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027101778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:52,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149424153] [2024-06-21 22:08:52,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:52,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:52,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:52,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:52,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 423 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 22:08:52,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:52,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:52,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:53,647 INFO L124 PetriNetUnfolderBase]: 1199/1863 cut-off events. [2024-06-21 22:08:53,647 INFO L125 PetriNetUnfolderBase]: For 11488/11488 co-relation queries the response was YES. [2024-06-21 22:08:53,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7568 conditions, 1863 events. 1199/1863 cut-off events. For 11488/11488 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8863 event pairs, 392 based on Foata normal form. 4/1862 useless extension candidates. Maximal degree in co-relation 7542. Up to 1619 conditions per place. [2024-06-21 22:08:53,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 26 changer transitions 0/92 dead transitions. [2024-06-21 22:08:53,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 92 transitions, 661 flow [2024-06-21 22:08:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 22:08:53,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 22:08:53,681 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 423 flow. Second operand 7 states and 128 transitions. [2024-06-21 22:08:53,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 92 transitions, 661 flow [2024-06-21 22:08:53,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 594 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:53,697 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 416 flow [2024-06-21 22:08:53,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-06-21 22:08:53,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 22:08:53,698 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 416 flow [2024-06-21 22:08:53,698 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 22:08:53,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:53,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:53,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 22:08:53,702 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 22:08:53,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:53,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2064750723, now seen corresponding path program 2 times [2024-06-21 22:08:53,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:53,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712631761] [2024-06-21 22:08:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:53,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:56,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:56,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712631761] [2024-06-21 22:08:56,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712631761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:56,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:56,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869893585] [2024-06-21 22:08:56,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:56,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:56,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:56,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:56,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 416 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 22:08:56,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:56,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:56,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:57,745 INFO L124 PetriNetUnfolderBase]: 1219/1908 cut-off events. [2024-06-21 22:08:57,745 INFO L125 PetriNetUnfolderBase]: For 13068/13068 co-relation queries the response was YES. [2024-06-21 22:08:57,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7841 conditions, 1908 events. 1219/1908 cut-off events. For 13068/13068 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9112 event pairs, 390 based on Foata normal form. 4/1909 useless extension candidates. Maximal degree in co-relation 7814. Up to 1726 conditions per place. [2024-06-21 22:08:57,772 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 20 changer transitions 0/96 dead transitions. [2024-06-21 22:08:57,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 96 transitions, 700 flow [2024-06-21 22:08:57,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:57,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:08:57,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:08:57,789 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 416 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:08:57,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 96 transitions, 700 flow [2024-06-21 22:08:57,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 631 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:57,801 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 437 flow [2024-06-21 22:08:57,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=437, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-06-21 22:08:57,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 22:08:57,802 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 437 flow [2024-06-21 22:08:57,802 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 22:08:57,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:57,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:57,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:08:57,803 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 22:08:57,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:57,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2064454053, now seen corresponding path program 3 times [2024-06-21 22:08:57,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:57,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977222137] [2024-06-21 22:08:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:00,488 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 22:09:00,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:00,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977222137] [2024-06-21 22:09:00,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977222137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:00,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:00,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420087485] [2024-06-21 22:09:00,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:00,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:00,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:00,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:00,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 437 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 22:09:00,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:00,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:00,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:01,283 INFO L124 PetriNetUnfolderBase]: 1211/1896 cut-off events. [2024-06-21 22:09:01,283 INFO L125 PetriNetUnfolderBase]: For 14763/14763 co-relation queries the response was YES. [2024-06-21 22:09:01,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 1896 events. 1211/1896 cut-off events. For 14763/14763 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9127 event pairs, 366 based on Foata normal form. 4/1897 useless extension candidates. Maximal degree in co-relation 7929. Up to 1642 conditions per place. [2024-06-21 22:09:01,293 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 24 changer transitions 0/97 dead transitions. [2024-06-21 22:09:01,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 713 flow [2024-06-21 22:09:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 22:09:01,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 22:09:01,295 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 437 flow. Second operand 7 states and 125 transitions. [2024-06-21 22:09:01,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 713 flow [2024-06-21 22:09:01,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 97 transitions, 663 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 22:09:01,304 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 476 flow [2024-06-21 22:09:01,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=476, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-21 22:09:01,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 22:09:01,305 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 476 flow [2024-06-21 22:09:01,305 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 22:09:01,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:01,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:01,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:09:01,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:01,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1505743332, now seen corresponding path program 1 times [2024-06-21 22:09:01,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:01,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716051265] [2024-06-21 22:09:01,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:01,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:02,973 INFO 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 22:09:02,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:02,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716051265] [2024-06-21 22:09:02,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716051265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:02,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:02,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:09:02,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207915140] [2024-06-21 22:09:02,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:02,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:09:02,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:09:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:09:02,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:09:02,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:02,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:02,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:09:02,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:03,633 INFO L124 PetriNetUnfolderBase]: 1035/1698 cut-off events. [2024-06-21 22:09:03,634 INFO L125 PetriNetUnfolderBase]: For 13628/13628 co-relation queries the response was YES. [2024-06-21 22:09:03,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7139 conditions, 1698 events. 1035/1698 cut-off events. For 13628/13628 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8335 event pairs, 357 based on Foata normal form. 2/1699 useless extension candidates. Maximal degree in co-relation 7108. Up to 1568 conditions per place. [2024-06-21 22:09:03,642 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-06-21 22:09:03,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 681 flow [2024-06-21 22:09:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:09:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:09:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 22:09:03,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 22:09:03,644 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 476 flow. Second operand 5 states and 89 transitions. [2024-06-21 22:09:03,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 681 flow [2024-06-21 22:09:03,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 85 transitions, 610 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:03,654 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 451 flow [2024-06-21 22:09:03,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=451, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-21 22:09:03,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 22:09:03,655 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 451 flow [2024-06-21 22:09:03,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:03,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:03,655 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 22:09:03,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:09:03,656 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 22:09:03,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1327056198, now seen corresponding path program 1 times [2024-06-21 22:09:03,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:03,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46672211] [2024-06-21 22:09:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:03,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:06,686 INFO 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 22:09:06,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:06,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46672211] [2024-06-21 22:09:06,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46672211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:06,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:06,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:06,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777035803] [2024-06-21 22:09:06,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:06,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:06,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:06,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:06,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:06,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 451 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 22:09:06,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:06,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:06,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:07,821 INFO L124 PetriNetUnfolderBase]: 1394/2205 cut-off events. [2024-06-21 22:09:07,821 INFO L125 PetriNetUnfolderBase]: For 23163/23163 co-relation queries the response was YES. [2024-06-21 22:09:07,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9915 conditions, 2205 events. 1394/2205 cut-off events. For 23163/23163 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11080 event pairs, 374 based on Foata normal form. 16/2220 useless extension candidates. Maximal degree in co-relation 9883. Up to 1733 conditions per place. [2024-06-21 22:09:07,833 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-21 22:09:07,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 952 flow [2024-06-21 22:09:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 22:09:07,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 22:09:07,835 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 451 flow. Second operand 9 states and 170 transitions. [2024-06-21 22:09:07,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 952 flow [2024-06-21 22:09:07,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 928 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 22:09:07,846 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 521 flow [2024-06-21 22:09:07,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=521, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-06-21 22:09:07,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 22:09:07,847 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 521 flow [2024-06-21 22:09:07,847 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 22:09:07,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:07,847 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 22:09:07,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:09:07,848 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 22:09:07,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash -144625644, now seen corresponding path program 2 times [2024-06-21 22:09:07,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:07,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266222598] [2024-06-21 22:09:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:07,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:10,753 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 22:09:10,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:10,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266222598] [2024-06-21 22:09:10,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266222598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:10,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:10,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:10,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118742326] [2024-06-21 22:09:10,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:10,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:10,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:10,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:10,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:10,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 521 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 22:09:10,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:10,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:10,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:11,867 INFO L124 PetriNetUnfolderBase]: 1358/2149 cut-off events. [2024-06-21 22:09:11,867 INFO L125 PetriNetUnfolderBase]: For 24081/24081 co-relation queries the response was YES. [2024-06-21 22:09:11,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9646 conditions, 2149 events. 1358/2149 cut-off events. For 24081/24081 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10731 event pairs, 467 based on Foata normal form. 20/2168 useless extension candidates. Maximal degree in co-relation 9613. Up to 1873 conditions per place. [2024-06-21 22:09:11,877 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 16 changer transitions 0/118 dead transitions. [2024-06-21 22:09:11,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 866 flow [2024-06-21 22:09:11,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:11,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 22:09:11,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 22:09:11,880 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 521 flow. Second operand 8 states and 149 transitions. [2024-06-21 22:09:11,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 866 flow [2024-06-21 22:09:11,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 822 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:11,896 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 516 flow [2024-06-21 22:09:11,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=516, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-06-21 22:09:11,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-21 22:09:11,896 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 516 flow [2024-06-21 22:09:11,897 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 22:09:11,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:11,897 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 22:09:11,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:09:11,897 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 22:09:11,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:11,898 INFO L85 PathProgramCache]: Analyzing trace with hash 136304660, now seen corresponding path program 3 times [2024-06-21 22:09:11,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:11,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048773972] [2024-06-21 22:09:11,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:11,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:14,548 INFO 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 22:09:14,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:14,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048773972] [2024-06-21 22:09:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048773972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:14,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:14,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:14,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129633087] [2024-06-21 22:09:14,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:14,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:14,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:14,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 516 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 22:09:14,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:14,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:14,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:15,917 INFO L124 PetriNetUnfolderBase]: 1446/2323 cut-off events. [2024-06-21 22:09:15,918 INFO L125 PetriNetUnfolderBase]: For 26957/26961 co-relation queries the response was YES. [2024-06-21 22:09:15,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10334 conditions, 2323 events. 1446/2323 cut-off events. For 26957/26961 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11921 event pairs, 407 based on Foata normal form. 24/2346 useless extension candidates. Maximal degree in co-relation 10299. Up to 1893 conditions per place. [2024-06-21 22:09:15,930 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 27 changer transitions 0/119 dead transitions. [2024-06-21 22:09:15,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 119 transitions, 887 flow [2024-06-21 22:09:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 22:09:15,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 22:09:15,935 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 516 flow. Second operand 8 states and 152 transitions. [2024-06-21 22:09:15,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 119 transitions, 887 flow [2024-06-21 22:09:15,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 119 transitions, 850 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:15,975 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 568 flow [2024-06-21 22:09:15,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=568, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2024-06-21 22:09:15,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-21 22:09:15,975 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 568 flow [2024-06-21 22:09:15,988 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 22:09:15,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:15,988 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 22:09:15,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:09:15,988 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 22:09:15,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:15,990 INFO L85 PathProgramCache]: Analyzing trace with hash -331496242, now seen corresponding path program 1 times [2024-06-21 22:09:15,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:15,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721879066] [2024-06-21 22:09:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:15,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:19,301 INFO 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 22:09:19,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:19,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721879066] [2024-06-21 22:09:19,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721879066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:19,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:19,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:19,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362097993] [2024-06-21 22:09:19,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:19,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:19,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:19,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:19,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:19,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 568 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 22:09:19,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:19,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:19,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:20,688 INFO L124 PetriNetUnfolderBase]: 1494/2401 cut-off events. [2024-06-21 22:09:20,689 INFO L125 PetriNetUnfolderBase]: For 29915/29919 co-relation queries the response was YES. [2024-06-21 22:09:20,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10945 conditions, 2401 events. 1494/2401 cut-off events. For 29915/29919 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12512 event pairs, 403 based on Foata normal form. 16/2416 useless extension candidates. Maximal degree in co-relation 10909. Up to 1725 conditions per place. [2024-06-21 22:09:20,702 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 30 changer transitions 0/122 dead transitions. [2024-06-21 22:09:20,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 122 transitions, 957 flow [2024-06-21 22:09:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:20,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 22:09:20,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 22:09:20,704 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 568 flow. Second operand 8 states and 153 transitions. [2024-06-21 22:09:20,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 122 transitions, 957 flow [2024-06-21 22:09:20,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 122 transitions, 892 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:20,725 INFO L231 Difference]: Finished difference. Result has 88 places, 78 transitions, 599 flow [2024-06-21 22:09:20,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=599, PETRI_PLACES=88, PETRI_TRANSITIONS=78} [2024-06-21 22:09:20,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 22:09:20,726 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 78 transitions, 599 flow [2024-06-21 22:09:20,726 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 22:09:20,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:20,726 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 22:09:20,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:09:20,727 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:20,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:20,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1173326885, now seen corresponding path program 1 times [2024-06-21 22:09:20,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:20,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061776957] [2024-06-21 22:09:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:20,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:22,813 INFO 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 22:09:22,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:22,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061776957] [2024-06-21 22:09:22,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061776957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:22,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:22,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:09:22,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873206884] [2024-06-21 22:09:22,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:22,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:09:22,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:09:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:09:22,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:22,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 78 transitions, 599 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:22,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:22,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:22,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:23,781 INFO L124 PetriNetUnfolderBase]: 1550/2483 cut-off events. [2024-06-21 22:09:23,781 INFO L125 PetriNetUnfolderBase]: For 31042/31042 co-relation queries the response was YES. [2024-06-21 22:09:23,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11435 conditions, 2483 events. 1550/2483 cut-off events. For 31042/31042 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13033 event pairs, 517 based on Foata normal form. 2/2481 useless extension candidates. Maximal degree in co-relation 11398. Up to 2302 conditions per place. [2024-06-21 22:09:23,792 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 88 selfloop transitions, 26 changer transitions 0/119 dead transitions. [2024-06-21 22:09:23,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 119 transitions, 1113 flow [2024-06-21 22:09:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:09:23,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:09:23,793 INFO L175 Difference]: Start difference. First operand has 88 places, 78 transitions, 599 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:09:23,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 119 transitions, 1113 flow [2024-06-21 22:09:23,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 1021 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:23,817 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 744 flow [2024-06-21 22:09:23,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2024-06-21 22:09:23,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-21 22:09:23,818 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 744 flow [2024-06-21 22:09:23,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:23,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:23,818 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 22:09:23,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:09:23,818 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:23,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:23,819 INFO L85 PathProgramCache]: Analyzing trace with hash -326618759, now seen corresponding path program 2 times [2024-06-21 22:09:23,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:23,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968921096] [2024-06-21 22:09:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:25,532 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 22:09:25,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:25,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968921096] [2024-06-21 22:09:25,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968921096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:25,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:25,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:09:25,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161990983] [2024-06-21 22:09:25,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:25,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:09:25,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:25,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:09:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:09:25,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:25,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 744 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:25,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:25,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:25,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:26,479 INFO L124 PetriNetUnfolderBase]: 1572/2520 cut-off events. [2024-06-21 22:09:26,481 INFO L125 PetriNetUnfolderBase]: For 32694/32694 co-relation queries the response was YES. [2024-06-21 22:09:26,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11857 conditions, 2520 events. 1572/2520 cut-off events. For 32694/32694 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13301 event pairs, 522 based on Foata normal form. 2/2521 useless extension candidates. Maximal degree in co-relation 11816. Up to 2319 conditions per place. [2024-06-21 22:09:26,492 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 93 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-06-21 22:09:26,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 135 transitions, 1225 flow [2024-06-21 22:09:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 22:09:26,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 22:09:26,494 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 744 flow. Second operand 7 states and 128 transitions. [2024-06-21 22:09:26,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 135 transitions, 1225 flow [2024-06-21 22:09:26,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 135 transitions, 1189 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 22:09:26,514 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 928 flow [2024-06-21 22:09:26,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=928, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2024-06-21 22:09:26,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 22:09:26,514 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 928 flow [2024-06-21 22:09:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:26,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:26,515 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 22:09:26,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:09:26,515 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 22:09:26,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash 681226938, now seen corresponding path program 4 times [2024-06-21 22:09:26,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:26,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092347187] [2024-06-21 22:09:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:26,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:29,071 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 22:09:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092347187] [2024-06-21 22:09:29,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092347187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:29,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:29,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742049112] [2024-06-21 22:09:29,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:29,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:29,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:29,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:29,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:29,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 928 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 22:09:29,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:29,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:29,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:30,369 INFO L124 PetriNetUnfolderBase]: 1604/2595 cut-off events. [2024-06-21 22:09:30,369 INFO L125 PetriNetUnfolderBase]: For 38386/38386 co-relation queries the response was YES. [2024-06-21 22:09:30,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 2595 events. 1604/2595 cut-off events. For 38386/38386 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13809 event pairs, 423 based on Foata normal form. 20/2608 useless extension candidates. Maximal degree in co-relation 12363. Up to 2099 conditions per place. [2024-06-21 22:09:30,381 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 38 changer transitions 0/145 dead transitions. [2024-06-21 22:09:30,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1348 flow [2024-06-21 22:09:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:09:30,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:09:30,383 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 928 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:09:30,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1348 flow [2024-06-21 22:09:30,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 145 transitions, 1310 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 22:09:30,407 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 1005 flow [2024-06-21 22:09:30,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1005, PETRI_PLACES=106, PETRI_TRANSITIONS=109} [2024-06-21 22:09:30,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 22:09:30,407 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 1005 flow [2024-06-21 22:09:30,408 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 22:09:30,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:30,408 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 22:09:30,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:09:30,408 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 22:09:30,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash 49479356, now seen corresponding path program 2 times [2024-06-21 22:09:30,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:30,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120614039] [2024-06-21 22:09:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:30,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:33,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:33,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120614039] [2024-06-21 22:09:33,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120614039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:33,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:33,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:33,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690197119] [2024-06-21 22:09:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:33,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:33,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:33,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 109 transitions, 1005 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 22:09:33,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:33,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:33,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:34,749 INFO L124 PetriNetUnfolderBase]: 1652/2691 cut-off events. [2024-06-21 22:09:34,749 INFO L125 PetriNetUnfolderBase]: For 42202/42202 co-relation queries the response was YES. [2024-06-21 22:09:34,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13098 conditions, 2691 events. 1652/2691 cut-off events. For 42202/42202 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14574 event pairs, 423 based on Foata normal form. 12/2696 useless extension candidates. Maximal degree in co-relation 13050. Up to 2077 conditions per place. [2024-06-21 22:09:34,768 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 103 selfloop transitions, 40 changer transitions 0/148 dead transitions. [2024-06-21 22:09:34,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 148 transitions, 1445 flow [2024-06-21 22:09:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 22:09:34,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 22:09:34,770 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 1005 flow. Second operand 8 states and 149 transitions. [2024-06-21 22:09:34,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 148 transitions, 1445 flow [2024-06-21 22:09:34,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 148 transitions, 1354 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:34,813 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 1034 flow [2024-06-21 22:09:34,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1034, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2024-06-21 22:09:34,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 22:09:34,814 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 1034 flow [2024-06-21 22:09:34,814 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 22:09:34,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:34,814 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 22:09:34,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:09:34,814 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 22:09:34,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1368275784, now seen corresponding path program 3 times [2024-06-21 22:09:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:34,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285861251] [2024-06-21 22:09:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:38,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:38,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285861251] [2024-06-21 22:09:38,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285861251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:38,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:38,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:38,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400335161] [2024-06-21 22:09:38,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:38,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:38,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:38,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:38,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:38,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:38,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 1034 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 22:09:38,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:38,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:38,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:39,461 INFO L124 PetriNetUnfolderBase]: 1632/2647 cut-off events. [2024-06-21 22:09:39,461 INFO L125 PetriNetUnfolderBase]: For 41769/41769 co-relation queries the response was YES. [2024-06-21 22:09:39,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12683 conditions, 2647 events. 1632/2647 cut-off events. For 41769/41769 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14187 event pairs, 305 based on Foata normal form. 12/2652 useless extension candidates. Maximal degree in co-relation 12634. Up to 1513 conditions per place. [2024-06-21 22:09:39,484 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 95 selfloop transitions, 47 changer transitions 0/147 dead transitions. [2024-06-21 22:09:39,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 147 transitions, 1400 flow [2024-06-21 22:09:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:09:39,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:09:39,486 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 1034 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:09:39,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 147 transitions, 1400 flow [2024-06-21 22:09:39,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 147 transitions, 1298 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:39,518 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 990 flow [2024-06-21 22:09:39,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2024-06-21 22:09:39,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 22:09:39,519 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 990 flow [2024-06-21 22:09:39,519 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 22:09:39,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:39,519 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 22:09:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:09:39,519 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:39,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash -429897577, now seen corresponding path program 3 times [2024-06-21 22:09:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:39,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219527911] [2024-06-21 22:09:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:39,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:41,690 INFO 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 22:09:41,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:41,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219527911] [2024-06-21 22:09:41,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219527911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:41,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:41,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:41,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863489642] [2024-06-21 22:09:41,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:41,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:41,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:41,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:41,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 990 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:41,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:41,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:41,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:42,648 INFO L124 PetriNetUnfolderBase]: 1626/2627 cut-off events. [2024-06-21 22:09:42,649 INFO L125 PetriNetUnfolderBase]: For 41255/41255 co-relation queries the response was YES. [2024-06-21 22:09:42,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12658 conditions, 2627 events. 1626/2627 cut-off events. For 41255/41255 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14120 event pairs, 549 based on Foata normal form. 2/2622 useless extension candidates. Maximal degree in co-relation 12608. Up to 2426 conditions per place. [2024-06-21 22:09:42,664 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 81 selfloop transitions, 35 changer transitions 0/121 dead transitions. [2024-06-21 22:09:42,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 121 transitions, 1268 flow [2024-06-21 22:09:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:09:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:09:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-21 22:09:42,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 22:09:42,666 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 990 flow. Second operand 6 states and 100 transitions. [2024-06-21 22:09:42,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 121 transitions, 1268 flow [2024-06-21 22:09:42,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 121 transitions, 1126 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:42,694 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 924 flow [2024-06-21 22:09:42,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=924, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2024-06-21 22:09:42,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 22:09:42,695 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 924 flow [2024-06-21 22:09:42,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:42,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:42,695 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 22:09:42,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:09:42,695 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:42,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash -423552683, now seen corresponding path program 1 times [2024-06-21 22:09:42,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:42,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490697231] [2024-06-21 22:09:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:42,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:44,486 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 22:09:44,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:44,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490697231] [2024-06-21 22:09:44,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490697231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:44,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:44,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:09:44,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463843828] [2024-06-21 22:09:44,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:44,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:09:44,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:44,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:09:44,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:09:44,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:09:44,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 924 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 22:09:44,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:44,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:09:44,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:45,449 INFO L124 PetriNetUnfolderBase]: 1589/2635 cut-off events. [2024-06-21 22:09:45,449 INFO L125 PetriNetUnfolderBase]: For 41261/41263 co-relation queries the response was YES. [2024-06-21 22:09:45,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12148 conditions, 2635 events. 1589/2635 cut-off events. For 41261/41263 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14886 event pairs, 762 based on Foata normal form. 4/2606 useless extension candidates. Maximal degree in co-relation 12098. Up to 2390 conditions per place. [2024-06-21 22:09:45,462 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 105 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-06-21 22:09:45,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1318 flow [2024-06-21 22:09:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:09:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:09:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-21 22:09:45,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:09:45,464 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 924 flow. Second operand 6 states and 112 transitions. [2024-06-21 22:09:45,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1318 flow [2024-06-21 22:09:45,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 135 transitions, 1265 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 22:09:45,506 INFO L231 Difference]: Finished difference. Result has 111 places, 115 transitions, 969 flow [2024-06-21 22:09:45,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=969, PETRI_PLACES=111, PETRI_TRANSITIONS=115} [2024-06-21 22:09:45,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 22:09:45,506 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 969 flow [2024-06-21 22:09:45,506 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 22:09:45,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:45,507 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 22:09:45,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:09:45,507 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:45,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -231382422, now seen corresponding path program 1 times [2024-06-21 22:09:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:45,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52543455] [2024-06-21 22:09:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:47,767 INFO 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 22:09:47,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:47,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52543455] [2024-06-21 22:09:47,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52543455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:47,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:47,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:47,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38936156] [2024-06-21 22:09:47,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:47,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:47,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:47,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:47,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:47,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 115 transitions, 969 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 22:09:47,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:47,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:47,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:48,965 INFO L124 PetriNetUnfolderBase]: 1676/2717 cut-off events. [2024-06-21 22:09:48,965 INFO L125 PetriNetUnfolderBase]: For 46279/46279 co-relation queries the response was YES. [2024-06-21 22:09:48,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13050 conditions, 2717 events. 1676/2717 cut-off events. For 46279/46279 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14749 event pairs, 544 based on Foata normal form. 4/2720 useless extension candidates. Maximal degree in co-relation 12999. Up to 2438 conditions per place. [2024-06-21 22:09:48,981 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 98 selfloop transitions, 43 changer transitions 0/146 dead transitions. [2024-06-21 22:09:48,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 146 transitions, 1443 flow [2024-06-21 22:09:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:48,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 22:09:48,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:09:48,982 INFO L175 Difference]: Start difference. First operand has 111 places, 115 transitions, 969 flow. Second operand 7 states and 126 transitions. [2024-06-21 22:09:48,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 146 transitions, 1443 flow [2024-06-21 22:09:49,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 146 transitions, 1414 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 22:09:49,021 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 1096 flow [2024-06-21 22:09:49,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1096, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-06-21 22:09:49,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 22:09:49,022 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 1096 flow [2024-06-21 22:09:49,022 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 22:09:49,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:49,022 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 22:09:49,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:09:49,023 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:49,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash 411484087, now seen corresponding path program 2 times [2024-06-21 22:09:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:49,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095456669] [2024-06-21 22:09:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:49,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:50,924 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 22:09:50,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:50,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095456669] [2024-06-21 22:09:50,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095456669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:50,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:50,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:09:50,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932327969] [2024-06-21 22:09:50,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:50,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:09:50,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:50,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:09:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:09:50,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:09:50,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 1096 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 22:09:50,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:50,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:09:50,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:51,602 INFO L124 PetriNetUnfolderBase]: 1593/2633 cut-off events. [2024-06-21 22:09:51,603 INFO L125 PetriNetUnfolderBase]: For 46544/46544 co-relation queries the response was YES. [2024-06-21 22:09:51,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12886 conditions, 2633 events. 1593/2633 cut-off events. For 46544/46544 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14819 event pairs, 789 based on Foata normal form. 4/2609 useless extension candidates. Maximal degree in co-relation 12833. Up to 2442 conditions per place. [2024-06-21 22:09:51,620 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2024-06-21 22:09:51,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 1374 flow [2024-06-21 22:09:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:09:51,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:09:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 22:09:51,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-21 22:09:51,622 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 1096 flow. Second operand 6 states and 103 transitions. [2024-06-21 22:09:51,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 1374 flow [2024-06-21 22:09:51,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 1314 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 22:09:51,663 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 1071 flow [2024-06-21 22:09:51,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1071, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-06-21 22:09:51,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 22:09:51,663 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 1071 flow [2024-06-21 22:09:51,664 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 22:09:51,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:51,664 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 22:09:51,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:09:51,664 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:51,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -960278030, now seen corresponding path program 2 times [2024-06-21 22:09:51,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:51,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169405230] [2024-06-21 22:09:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:51,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:53,712 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 22:09:53,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:53,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169405230] [2024-06-21 22:09:53,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169405230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:53,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:53,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:53,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239078941] [2024-06-21 22:09:53,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:53,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:53,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:53,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:53,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:53,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:53,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 1071 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 22:09:53,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:53,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:53,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:54,821 INFO L124 PetriNetUnfolderBase]: 1678/2721 cut-off events. [2024-06-21 22:09:54,821 INFO L125 PetriNetUnfolderBase]: For 51371/51371 co-relation queries the response was YES. [2024-06-21 22:09:54,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13487 conditions, 2721 events. 1678/2721 cut-off events. For 51371/51371 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14769 event pairs, 538 based on Foata normal form. 4/2718 useless extension candidates. Maximal degree in co-relation 13432. Up to 2430 conditions per place. [2024-06-21 22:09:54,839 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-06-21 22:09:54,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 142 transitions, 1497 flow [2024-06-21 22:09:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:09:54,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:09:54,840 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 1071 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:09:54,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 142 transitions, 1497 flow [2024-06-21 22:09:54,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 142 transitions, 1457 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:54,876 INFO L231 Difference]: Finished difference. Result has 121 places, 124 transitions, 1155 flow [2024-06-21 22:09:54,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1155, PETRI_PLACES=121, PETRI_TRANSITIONS=124} [2024-06-21 22:09:54,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 22:09:54,881 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 124 transitions, 1155 flow [2024-06-21 22:09:54,881 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 22:09:54,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:54,881 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 22:09:54,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:09:54,882 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:54,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:54,883 INFO L85 PathProgramCache]: Analyzing trace with hash -97823534, now seen corresponding path program 3 times [2024-06-21 22:09:54,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:54,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436189485] [2024-06-21 22:09:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:54,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:57,421 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 22:09:57,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:57,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436189485] [2024-06-21 22:09:57,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436189485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:57,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:57,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:09:57,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646957445] [2024-06-21 22:09:57,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:57,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:09:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:09:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:09:57,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:57,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 124 transitions, 1155 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 22:09:57,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:57,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:57,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:58,522 INFO L124 PetriNetUnfolderBase]: 1666/2724 cut-off events. [2024-06-21 22:09:58,523 INFO L125 PetriNetUnfolderBase]: For 53979/53979 co-relation queries the response was YES. [2024-06-21 22:09:58,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 2724 events. 1666/2724 cut-off events. For 53979/53979 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15087 event pairs, 852 based on Foata normal form. 4/2727 useless extension candidates. Maximal degree in co-relation 13465. Up to 2562 conditions per place. [2024-06-21 22:09:58,537 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 15 changer transitions 0/138 dead transitions. [2024-06-21 22:09:58,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 138 transitions, 1463 flow [2024-06-21 22:09:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 22:09:58,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 22:09:58,539 INFO L175 Difference]: Start difference. First operand has 121 places, 124 transitions, 1155 flow. Second operand 7 states and 110 transitions. [2024-06-21 22:09:58,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 138 transitions, 1463 flow [2024-06-21 22:09:58,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 138 transitions, 1325 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 22:09:58,576 INFO L231 Difference]: Finished difference. Result has 123 places, 124 transitions, 1053 flow [2024-06-21 22:09:58,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=123, PETRI_TRANSITIONS=124} [2024-06-21 22:09:58,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 22:09:58,578 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 124 transitions, 1053 flow [2024-06-21 22:09:58,578 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 22:09:58,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:58,579 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 22:09:58,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:09:58,579 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 22:09:58,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:58,579 INFO L85 PathProgramCache]: Analyzing trace with hash -959847440, now seen corresponding path program 1 times [2024-06-21 22:09:58,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:58,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186775297] [2024-06-21 22:09:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:58,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:01,799 INFO 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 22:10:01,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:01,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186775297] [2024-06-21 22:10:01,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186775297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:01,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:01,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:10:01,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531641165] [2024-06-21 22:10:01,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:01,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:10:01,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:01,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:10:01,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:10:01,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:01,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 124 transitions, 1053 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 22:10:01,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:01,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:01,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:02,797 INFO L124 PetriNetUnfolderBase]: 1661/2717 cut-off events. [2024-06-21 22:10:02,798 INFO L125 PetriNetUnfolderBase]: For 54684/54684 co-relation queries the response was YES. [2024-06-21 22:10:02,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13326 conditions, 2717 events. 1661/2717 cut-off events. For 54684/54684 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15014 event pairs, 851 based on Foata normal form. 2/2718 useless extension candidates. Maximal degree in co-relation 13269. Up to 2565 conditions per place. [2024-06-21 22:10:02,815 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 120 selfloop transitions, 14 changer transitions 0/139 dead transitions. [2024-06-21 22:10:02,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 139 transitions, 1379 flow [2024-06-21 22:10:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:10:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:10:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 22:10:02,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-21 22:10:02,817 INFO L175 Difference]: Start difference. First operand has 123 places, 124 transitions, 1053 flow. Second operand 7 states and 108 transitions. [2024-06-21 22:10:02,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 139 transitions, 1379 flow [2024-06-21 22:10:02,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 139 transitions, 1313 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:10:02,862 INFO L231 Difference]: Finished difference. Result has 123 places, 126 transitions, 1050 flow [2024-06-21 22:10:02,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1050, PETRI_PLACES=123, PETRI_TRANSITIONS=126} [2024-06-21 22:10:02,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 22:10:02,863 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 126 transitions, 1050 flow [2024-06-21 22:10:02,863 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 22:10:02,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:02,864 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 22:10:02,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 22:10:02,864 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:02,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash 535576546, now seen corresponding path program 1 times [2024-06-21 22:10:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:02,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539062222] [2024-06-21 22:10:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:02,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:04,772 INFO 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 22:10:04,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:04,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539062222] [2024-06-21 22:10:04,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539062222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:04,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:04,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:04,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506892544] [2024-06-21 22:10:04,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:04,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:04,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:04,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:04,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 126 transitions, 1050 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 22:10:04,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:04,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:04,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:05,806 INFO L124 PetriNetUnfolderBase]: 1765/2879 cut-off events. [2024-06-21 22:10:05,807 INFO L125 PetriNetUnfolderBase]: For 59321/59323 co-relation queries the response was YES. [2024-06-21 22:10:05,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14224 conditions, 2879 events. 1765/2879 cut-off events. For 59321/59323 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15817 event pairs, 470 based on Foata normal form. 4/2882 useless extension candidates. Maximal degree in co-relation 14167. Up to 2491 conditions per place. [2024-06-21 22:10:05,825 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 50 changer transitions 0/199 dead transitions. [2024-06-21 22:10:05,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 199 transitions, 1989 flow [2024-06-21 22:10:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:10:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:10:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 22:10:05,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 22:10:05,827 INFO L175 Difference]: Start difference. First operand has 123 places, 126 transitions, 1050 flow. Second operand 8 states and 152 transitions. [2024-06-21 22:10:05,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 199 transitions, 1989 flow [2024-06-21 22:10:05,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 199 transitions, 1942 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:10:05,873 INFO L231 Difference]: Finished difference. Result has 130 places, 159 transitions, 1449 flow [2024-06-21 22:10:05,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=130, PETRI_TRANSITIONS=159} [2024-06-21 22:10:05,874 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-21 22:10:05,874 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 159 transitions, 1449 flow [2024-06-21 22:10:05,874 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 22:10:05,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:05,874 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 22:10:05,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 22:10:05,875 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:05,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:05,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1264499264, now seen corresponding path program 2 times [2024-06-21 22:10:05,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336381390] [2024-06-21 22:10:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:08,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:08,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336381390] [2024-06-21 22:10:08,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336381390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:08,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:08,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:08,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087465574] [2024-06-21 22:10:08,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:08,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:08,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:08,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:08,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 159 transitions, 1449 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 22:10:08,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:08,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:08,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:09,057 INFO L124 PetriNetUnfolderBase]: 1769/2861 cut-off events. [2024-06-21 22:10:09,057 INFO L125 PetriNetUnfolderBase]: For 64438/64438 co-relation queries the response was YES. [2024-06-21 22:10:09,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15053 conditions, 2861 events. 1769/2861 cut-off events. For 64438/64438 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15628 event pairs, 542 based on Foata normal form. 4/2864 useless extension candidates. Maximal degree in co-relation 14991. Up to 2615 conditions per place. [2024-06-21 22:10:09,077 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 134 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-21 22:10:09,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 189 transitions, 1945 flow [2024-06-21 22:10:09,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:10:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:10:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:10:09,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:10:09,079 INFO L175 Difference]: Start difference. First operand has 130 places, 159 transitions, 1449 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:10:09,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 189 transitions, 1945 flow [2024-06-21 22:10:09,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1905 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-21 22:10:09,135 INFO L231 Difference]: Finished difference. Result has 137 places, 162 transitions, 1559 flow [2024-06-21 22:10:09,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1559, PETRI_PLACES=137, PETRI_TRANSITIONS=162} [2024-06-21 22:10:09,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 22:10:09,136 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 162 transitions, 1559 flow [2024-06-21 22:10:09,136 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 22:10:09,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:09,136 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 22:10:09,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 22:10:09,137 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:09,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1134923884, now seen corresponding path program 3 times [2024-06-21 22:10:09,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:09,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604889596] [2024-06-21 22:10:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:11,405 INFO 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 22:10:11,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:11,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604889596] [2024-06-21 22:10:11,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604889596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:11,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:11,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:11,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062159922] [2024-06-21 22:10:11,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:11,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:11,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:11,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:11,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:11,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:11,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 162 transitions, 1559 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 22:10:11,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:11,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:11,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:12,635 INFO L124 PetriNetUnfolderBase]: 1805/2931 cut-off events. [2024-06-21 22:10:12,636 INFO L125 PetriNetUnfolderBase]: For 70377/70379 co-relation queries the response was YES. [2024-06-21 22:10:12,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15931 conditions, 2931 events. 1805/2931 cut-off events. For 70377/70379 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16088 event pairs, 471 based on Foata normal form. 6/2936 useless extension candidates. Maximal degree in co-relation 15866. Up to 2535 conditions per place. [2024-06-21 22:10:12,658 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 137 selfloop transitions, 60 changer transitions 0/202 dead transitions. [2024-06-21 22:10:12,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 202 transitions, 2288 flow [2024-06-21 22:10:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:10:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:10:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 22:10:12,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 22:10:12,660 INFO L175 Difference]: Start difference. First operand has 137 places, 162 transitions, 1559 flow. Second operand 7 states and 130 transitions. [2024-06-21 22:10:12,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 202 transitions, 2288 flow [2024-06-21 22:10:12,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 202 transitions, 2166 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:12,726 INFO L231 Difference]: Finished difference. Result has 139 places, 173 transitions, 1725 flow [2024-06-21 22:10:12,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=139, PETRI_TRANSITIONS=173} [2024-06-21 22:10:12,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 22:10:12,727 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 173 transitions, 1725 flow [2024-06-21 22:10:12,727 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 22:10:12,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:12,727 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 22:10:12,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 22:10:12,728 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:12,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1130162284, now seen corresponding path program 4 times [2024-06-21 22:10:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:12,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468975118] [2024-06-21 22:10:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:12,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:14,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:14,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468975118] [2024-06-21 22:10:14,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468975118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:14,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:14,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:14,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144725465] [2024-06-21 22:10:14,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:14,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:14,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:14,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:14,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 173 transitions, 1725 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 22:10:14,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:14,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:14,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:15,914 INFO L124 PetriNetUnfolderBase]: 1825/2943 cut-off events. [2024-06-21 22:10:15,915 INFO L125 PetriNetUnfolderBase]: For 74887/74887 co-relation queries the response was YES. [2024-06-21 22:10:15,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16456 conditions, 2943 events. 1825/2943 cut-off events. For 74887/74887 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16116 event pairs, 551 based on Foata normal form. 4/2946 useless extension candidates. Maximal degree in co-relation 16389. Up to 2681 conditions per place. [2024-06-21 22:10:15,937 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 140 selfloop transitions, 56 changer transitions 0/201 dead transitions. [2024-06-21 22:10:15,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 201 transitions, 2296 flow [2024-06-21 22:10:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:10:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:10:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:10:15,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:10:15,938 INFO L175 Difference]: Start difference. First operand has 139 places, 173 transitions, 1725 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:10:15,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 201 transitions, 2296 flow [2024-06-21 22:10:16,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 2186 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 22:10:16,003 INFO L231 Difference]: Finished difference. Result has 142 places, 179 transitions, 1839 flow [2024-06-21 22:10:16,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1839, PETRI_PLACES=142, PETRI_TRANSITIONS=179} [2024-06-21 22:10:16,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-21 22:10:16,004 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 179 transitions, 1839 flow [2024-06-21 22:10:16,004 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 22:10:16,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:16,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:16,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:10:16,005 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:16,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:16,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1584802212, now seen corresponding path program 5 times [2024-06-21 22:10:16,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:16,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434344549] [2024-06-21 22:10:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:16,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:18,428 INFO 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 22:10:18,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:18,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434344549] [2024-06-21 22:10:18,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434344549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:18,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:18,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:18,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864565006] [2024-06-21 22:10:18,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:18,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:18,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:18,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:18,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 179 transitions, 1839 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 22:10:18,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:18,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:18,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:19,445 INFO L124 PetriNetUnfolderBase]: 1829/2963 cut-off events. [2024-06-21 22:10:19,445 INFO L125 PetriNetUnfolderBase]: For 75313/75313 co-relation queries the response was YES. [2024-06-21 22:10:19,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16664 conditions, 2963 events. 1829/2963 cut-off events. For 75313/75313 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16263 event pairs, 472 based on Foata normal form. 4/2963 useless extension candidates. Maximal degree in co-relation 16597. Up to 2564 conditions per place. [2024-06-21 22:10:19,468 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 135 selfloop transitions, 68 changer transitions 0/208 dead transitions. [2024-06-21 22:10:19,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 208 transitions, 2516 flow [2024-06-21 22:10:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:10:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:10:19,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:10:19,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:10:19,470 INFO L175 Difference]: Start difference. First operand has 142 places, 179 transitions, 1839 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:10:19,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 208 transitions, 2516 flow [2024-06-21 22:10:19,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 208 transitions, 2356 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 22:10:19,537 INFO L231 Difference]: Finished difference. Result has 145 places, 184 transitions, 1897 flow [2024-06-21 22:10:19,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1689, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1897, PETRI_PLACES=145, PETRI_TRANSITIONS=184} [2024-06-21 22:10:19,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 22:10:19,538 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 184 transitions, 1897 flow [2024-06-21 22:10:19,538 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 22:10:19,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:19,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:19,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:10:19,538 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:19,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:19,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1585130502, now seen corresponding path program 6 times [2024-06-21 22:10:19,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:19,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553709033] [2024-06-21 22:10:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:19,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:21,809 INFO 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 22:10:21,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:21,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553709033] [2024-06-21 22:10:21,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553709033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:21,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:21,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507408977] [2024-06-21 22:10:21,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:21,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:21,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:21,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 184 transitions, 1897 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 22:10:21,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:21,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:21,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:23,050 INFO L124 PetriNetUnfolderBase]: 1839/2975 cut-off events. [2024-06-21 22:10:23,050 INFO L125 PetriNetUnfolderBase]: For 73578/73578 co-relation queries the response was YES. [2024-06-21 22:10:23,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16532 conditions, 2975 events. 1839/2975 cut-off events. For 73578/73578 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16284 event pairs, 475 based on Foata normal form. 2/2973 useless extension candidates. Maximal degree in co-relation 16464. Up to 2574 conditions per place. [2024-06-21 22:10:23,073 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 131 selfloop transitions, 71 changer transitions 0/207 dead transitions. [2024-06-21 22:10:23,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 207 transitions, 2473 flow [2024-06-21 22:10:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:10:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:10:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:10:23,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 22:10:23,074 INFO L175 Difference]: Start difference. First operand has 145 places, 184 transitions, 1897 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:10:23,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 207 transitions, 2473 flow [2024-06-21 22:10:23,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 207 transitions, 2371 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 22:10:23,156 INFO L231 Difference]: Finished difference. Result has 149 places, 188 transitions, 1997 flow [2024-06-21 22:10:23,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1997, PETRI_PLACES=149, PETRI_TRANSITIONS=188} [2024-06-21 22:10:23,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 22:10:23,157 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 188 transitions, 1997 flow [2024-06-21 22:10:23,157 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 22:10:23,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:23,157 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 22:10:23,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:10:23,158 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:23,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1701287106, now seen corresponding path program 7 times [2024-06-21 22:10:23,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:23,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865107511] [2024-06-21 22:10:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:23,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:25,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:25,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865107511] [2024-06-21 22:10:25,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865107511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:25,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:25,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:25,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371010484] [2024-06-21 22:10:25,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:25,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:25,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:25,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:25,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 188 transitions, 1997 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 22:10:25,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:25,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:25,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:26,642 INFO L124 PetriNetUnfolderBase]: 1843/2969 cut-off events. [2024-06-21 22:10:26,642 INFO L125 PetriNetUnfolderBase]: For 78380/78380 co-relation queries the response was YES. [2024-06-21 22:10:26,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16593 conditions, 2969 events. 1843/2969 cut-off events. For 78380/78380 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16255 event pairs, 561 based on Foata normal form. 4/2966 useless extension candidates. Maximal degree in co-relation 16524. Up to 2678 conditions per place. [2024-06-21 22:10:26,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 137 selfloop transitions, 67 changer transitions 0/209 dead transitions. [2024-06-21 22:10:26,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 209 transitions, 2565 flow [2024-06-21 22:10:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 22:10:26,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 22:10:26,662 INFO L175 Difference]: Start difference. First operand has 149 places, 188 transitions, 1997 flow. Second operand 9 states and 143 transitions. [2024-06-21 22:10:26,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 209 transitions, 2565 flow [2024-06-21 22:10:26,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 209 transitions, 2459 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 22:10:26,730 INFO L231 Difference]: Finished difference. Result has 155 places, 191 transitions, 2081 flow [2024-06-21 22:10:26,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2081, PETRI_PLACES=155, PETRI_TRANSITIONS=191} [2024-06-21 22:10:26,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-21 22:10:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 191 transitions, 2081 flow [2024-06-21 22:10:26,731 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 22:10:26,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:26,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:10:26,732 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:26,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash -958386634, now seen corresponding path program 8 times [2024-06-21 22:10:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951172408] [2024-06-21 22:10:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:26,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:29,127 INFO 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 22:10:29,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:29,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951172408] [2024-06-21 22:10:29,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951172408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:29,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:29,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537459240] [2024-06-21 22:10:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:29,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:29,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:29,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 191 transitions, 2081 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 22:10:29,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:29,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:29,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:30,001 INFO L124 PetriNetUnfolderBase]: 1837/2957 cut-off events. [2024-06-21 22:10:30,001 INFO L125 PetriNetUnfolderBase]: For 80662/80662 co-relation queries the response was YES. [2024-06-21 22:10:30,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16827 conditions, 2957 events. 1837/2957 cut-off events. For 80662/80662 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16126 event pairs, 561 based on Foata normal form. 2/2952 useless extension candidates. Maximal degree in co-relation 16757. Up to 2673 conditions per place. [2024-06-21 22:10:30,023 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 130 selfloop transitions, 69 changer transitions 0/204 dead transitions. [2024-06-21 22:10:30,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 204 transitions, 2513 flow [2024-06-21 22:10:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:10:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:10:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 22:10:30,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 22:10:30,025 INFO L175 Difference]: Start difference. First operand has 155 places, 191 transitions, 2081 flow. Second operand 8 states and 126 transitions. [2024-06-21 22:10:30,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 204 transitions, 2513 flow [2024-06-21 22:10:30,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 204 transitions, 2343 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:30,092 INFO L231 Difference]: Finished difference. Result has 157 places, 191 transitions, 2055 flow [2024-06-21 22:10:30,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2055, PETRI_PLACES=157, PETRI_TRANSITIONS=191} [2024-06-21 22:10:30,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 22:10:30,092 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 191 transitions, 2055 flow [2024-06-21 22:10:30,092 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 22:10:30,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:30,093 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 22:10:30,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:10:30,093 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:30,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2087983584, now seen corresponding path program 1 times [2024-06-21 22:10:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:30,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684346399] [2024-06-21 22:10:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:32,800 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 22:10:32,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684346399] [2024-06-21 22:10:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684346399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:32,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:32,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:10:32,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695934289] [2024-06-21 22:10:32,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:32,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:10:32,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:32,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:10:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:10:32,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:10:32,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 191 transitions, 2055 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 22:10:32,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:32,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:10:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:33,944 INFO L124 PetriNetUnfolderBase]: 1873/3067 cut-off events. [2024-06-21 22:10:33,944 INFO L125 PetriNetUnfolderBase]: For 109296/109313 co-relation queries the response was YES. [2024-06-21 22:10:33,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18033 conditions, 3067 events. 1873/3067 cut-off events. For 109296/109313 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17529 event pairs, 765 based on Foata normal form. 10/3028 useless extension candidates. Maximal degree in co-relation 17962. Up to 2598 conditions per place. [2024-06-21 22:10:33,969 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 170 selfloop transitions, 26 changer transitions 0/226 dead transitions. [2024-06-21 22:10:33,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 226 transitions, 2661 flow [2024-06-21 22:10:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:10:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:10:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 22:10:33,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 22:10:33,973 INFO L175 Difference]: Start difference. First operand has 157 places, 191 transitions, 2055 flow. Second operand 7 states and 134 transitions. [2024-06-21 22:10:33,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 226 transitions, 2661 flow [2024-06-21 22:10:34,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 2543 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:34,083 INFO L231 Difference]: Finished difference. Result has 158 places, 193 transitions, 2023 flow [2024-06-21 22:10:34,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2023, PETRI_PLACES=158, PETRI_TRANSITIONS=193} [2024-06-21 22:10:34,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-21 22:10:34,085 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 193 transitions, 2023 flow [2024-06-21 22:10:34,085 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 22:10:34,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:34,086 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 22:10:34,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:10:34,086 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:34,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash 544772845, now seen corresponding path program 1 times [2024-06-21 22:10:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:34,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539799575] [2024-06-21 22:10:34,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:34,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:36,691 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 22:10:36,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:36,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539799575] [2024-06-21 22:10:36,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539799575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:36,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:36,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:10:36,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033823503] [2024-06-21 22:10:36,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:36,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:10:36,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:36,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:10:36,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:10:36,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:36,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 193 transitions, 2023 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 22:10:36,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:36,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:36,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:37,880 INFO L124 PetriNetUnfolderBase]: 2043/3267 cut-off events. [2024-06-21 22:10:37,881 INFO L125 PetriNetUnfolderBase]: For 105251/105251 co-relation queries the response was YES. [2024-06-21 22:10:37,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19036 conditions, 3267 events. 2043/3267 cut-off events. For 105251/105251 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17986 event pairs, 572 based on Foata normal form. 8/3274 useless extension candidates. Maximal degree in co-relation 18964. Up to 2855 conditions per place. [2024-06-21 22:10:37,907 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 168 selfloop transitions, 66 changer transitions 0/239 dead transitions. [2024-06-21 22:10:37,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 239 transitions, 2798 flow [2024-06-21 22:10:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:10:37,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:10:37,908 INFO L175 Difference]: Start difference. First operand has 158 places, 193 transitions, 2023 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:10:37,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 239 transitions, 2798 flow [2024-06-21 22:10:38,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 239 transitions, 2764 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:10:38,014 INFO L231 Difference]: Finished difference. Result has 165 places, 204 transitions, 2277 flow [2024-06-21 22:10:38,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2277, PETRI_PLACES=165, PETRI_TRANSITIONS=204} [2024-06-21 22:10:38,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 22:10:38,015 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 204 transitions, 2277 flow [2024-06-21 22:10:38,015 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 22:10:38,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:38,015 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 22:10:38,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:10:38,015 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:38,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash 987686908, now seen corresponding path program 2 times [2024-06-21 22:10:38,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:38,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857559918] [2024-06-21 22:10:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:38,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:41,021 INFO 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 22:10:41,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:41,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857559918] [2024-06-21 22:10:41,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857559918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:41,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:41,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:10:41,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189523215] [2024-06-21 22:10:41,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:41,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:10:41,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:10:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:10:41,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:10:41,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 204 transitions, 2277 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 22:10:41,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:41,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:10:41,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:42,221 INFO L124 PetriNetUnfolderBase]: 2035/3304 cut-off events. [2024-06-21 22:10:42,221 INFO L125 PetriNetUnfolderBase]: For 133361/133377 co-relation queries the response was YES. [2024-06-21 22:10:42,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20591 conditions, 3304 events. 2035/3304 cut-off events. For 133361/133377 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18973 event pairs, 828 based on Foata normal form. 14/3270 useless extension candidates. Maximal degree in co-relation 20516. Up to 2921 conditions per place. [2024-06-21 22:10:42,250 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 177 selfloop transitions, 24 changer transitions 0/231 dead transitions. [2024-06-21 22:10:42,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 231 transitions, 2787 flow [2024-06-21 22:10:42,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:10:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:10:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 22:10:42,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 22:10:42,251 INFO L175 Difference]: Start difference. First operand has 165 places, 204 transitions, 2277 flow. Second operand 7 states and 128 transitions. [2024-06-21 22:10:42,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 231 transitions, 2787 flow [2024-06-21 22:10:42,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 231 transitions, 2698 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 22:10:42,382 INFO L231 Difference]: Finished difference. Result has 169 places, 205 transitions, 2260 flow [2024-06-21 22:10:42,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2188, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2260, PETRI_PLACES=169, PETRI_TRANSITIONS=205} [2024-06-21 22:10:42,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 22:10:42,384 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 205 transitions, 2260 flow [2024-06-21 22:10:42,384 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 22:10:42,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:42,384 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 22:10:42,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:10:42,385 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:42,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash -822900711, now seen corresponding path program 2 times [2024-06-21 22:10:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:42,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587583299] [2024-06-21 22:10:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:42,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:44,846 INFO 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 22:10:44,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:44,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587583299] [2024-06-21 22:10:44,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587583299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:44,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:44,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:10:44,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579738149] [2024-06-21 22:10:44,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:44,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:10:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:10:44,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:10:44,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:44,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 205 transitions, 2260 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 22:10:44,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:44,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:44,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:46,387 INFO L124 PetriNetUnfolderBase]: 2147/3439 cut-off events. [2024-06-21 22:10:46,387 INFO L125 PetriNetUnfolderBase]: For 118957/118959 co-relation queries the response was YES. [2024-06-21 22:10:46,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20960 conditions, 3439 events. 2147/3439 cut-off events. For 118957/118959 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19099 event pairs, 530 based on Foata normal form. 6/3444 useless extension candidates. Maximal degree in co-relation 20883. Up to 2802 conditions per place. [2024-06-21 22:10:46,410 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 89 changer transitions 0/261 dead transitions. [2024-06-21 22:10:46,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 261 transitions, 3253 flow [2024-06-21 22:10:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:10:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:10:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 22:10:46,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 22:10:46,412 INFO L175 Difference]: Start difference. First operand has 169 places, 205 transitions, 2260 flow. Second operand 8 states and 150 transitions. [2024-06-21 22:10:46,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 261 transitions, 3253 flow [2024-06-21 22:10:46,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 261 transitions, 3203 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 22:10:46,539 INFO L231 Difference]: Finished difference. Result has 174 places, 226 transitions, 2731 flow [2024-06-21 22:10:46,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2731, PETRI_PLACES=174, PETRI_TRANSITIONS=226} [2024-06-21 22:10:46,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 22:10:46,540 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 226 transitions, 2731 flow [2024-06-21 22:10:46,540 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 22:10:46,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:46,540 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 22:10:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:10:46,540 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:46,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash 299253846, now seen corresponding path program 3 times [2024-06-21 22:10:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924092331] [2024-06-21 22:10:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:49,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:49,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924092331] [2024-06-21 22:10:49,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924092331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:49,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:49,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:10:49,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621101897] [2024-06-21 22:10:49,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:49,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:10:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:49,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:10:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:10:49,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:10:49,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 226 transitions, 2731 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 22:10:49,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:49,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:10:49,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:50,680 INFO L124 PetriNetUnfolderBase]: 2044/3307 cut-off events. [2024-06-21 22:10:50,680 INFO L125 PetriNetUnfolderBase]: For 137919/137935 co-relation queries the response was YES. [2024-06-21 22:10:50,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21272 conditions, 3307 events. 2044/3307 cut-off events. For 137919/137935 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18921 event pairs, 867 based on Foata normal form. 14/3271 useless extension candidates. Maximal degree in co-relation 21192. Up to 2976 conditions per place. [2024-06-21 22:10:50,710 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 199 selfloop transitions, 17 changer transitions 0/246 dead transitions. [2024-06-21 22:10:50,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 246 transitions, 3241 flow [2024-06-21 22:10:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:10:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:10:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:10:50,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 22:10:50,712 INFO L175 Difference]: Start difference. First operand has 174 places, 226 transitions, 2731 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:10:50,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 246 transitions, 3241 flow [2024-06-21 22:10:50,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 246 transitions, 3154 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 22:10:50,867 INFO L231 Difference]: Finished difference. Result has 178 places, 226 transitions, 2684 flow [2024-06-21 22:10:50,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2684, PETRI_PLACES=178, PETRI_TRANSITIONS=226} [2024-06-21 22:10:50,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 22:10:50,867 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 226 transitions, 2684 flow [2024-06-21 22:10:50,868 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 22:10:50,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:50,868 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 22:10:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:10:50,868 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:50,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:50,868 INFO L85 PathProgramCache]: Analyzing trace with hash 573401035, now seen corresponding path program 3 times [2024-06-21 22:10:50,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:50,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330978942] [2024-06-21 22:10:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:50,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:53,238 INFO 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 22:10:53,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:53,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330978942] [2024-06-21 22:10:53,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330978942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:53,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:53,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:10:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434874463] [2024-06-21 22:10:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:10:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:53,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:10:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:10:53,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:53,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 226 transitions, 2684 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 22:10:53,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:53,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:53,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:54,409 INFO L124 PetriNetUnfolderBase]: 2090/3340 cut-off events. [2024-06-21 22:10:54,410 INFO L125 PetriNetUnfolderBase]: For 115822/115822 co-relation queries the response was YES. [2024-06-21 22:10:54,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20596 conditions, 3340 events. 2090/3340 cut-off events. For 115822/115822 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18469 event pairs, 571 based on Foata normal form. 8/3347 useless extension candidates. Maximal degree in co-relation 20514. Up to 2944 conditions per place. [2024-06-21 22:10:54,436 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 176 selfloop transitions, 82 changer transitions 0/263 dead transitions. [2024-06-21 22:10:54,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 263 transitions, 3324 flow [2024-06-21 22:10:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:10:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:10:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-21 22:10:54,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069264069264069 [2024-06-21 22:10:54,438 INFO L175 Difference]: Start difference. First operand has 178 places, 226 transitions, 2684 flow. Second operand 11 states and 188 transitions. [2024-06-21 22:10:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 263 transitions, 3324 flow [2024-06-21 22:10:54,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 263 transitions, 3251 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:54,574 INFO L231 Difference]: Finished difference. Result has 183 places, 226 transitions, 2785 flow [2024-06-21 22:10:54,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2611, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2785, PETRI_PLACES=183, PETRI_TRANSITIONS=226} [2024-06-21 22:10:54,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-21 22:10:54,575 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 226 transitions, 2785 flow [2024-06-21 22:10:54,575 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 22:10:54,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:54,575 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 22:10:54,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:10:54,576 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 22:10:54,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:54,576 INFO L85 PathProgramCache]: Analyzing trace with hash 576261677, now seen corresponding path program 1 times [2024-06-21 22:10:54,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:54,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118184551] [2024-06-21 22:10:54,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:54,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:57,771 INFO 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 22:10:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:57,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118184551] [2024-06-21 22:10:57,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118184551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:57,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:57,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:57,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441820557] [2024-06-21 22:10:57,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:57,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:57,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:57,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:57,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 226 transitions, 2785 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 22:10:57,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:57,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:57,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:58,948 INFO L124 PetriNetUnfolderBase]: 2134/3408 cut-off events. [2024-06-21 22:10:58,948 INFO L125 PetriNetUnfolderBase]: For 124829/124829 co-relation queries the response was YES. [2024-06-21 22:10:58,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21163 conditions, 3408 events. 2134/3408 cut-off events. For 124829/124829 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18963 event pairs, 577 based on Foata normal form. 12/3419 useless extension candidates. Maximal degree in co-relation 21080. Up to 3040 conditions per place. [2024-06-21 22:10:58,981 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 65 changer transitions 0/263 dead transitions. [2024-06-21 22:10:58,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 263 transitions, 3481 flow [2024-06-21 22:10:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 22:10:58,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 22:10:58,982 INFO L175 Difference]: Start difference. First operand has 183 places, 226 transitions, 2785 flow. Second operand 9 states and 160 transitions. [2024-06-21 22:10:58,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 263 transitions, 3481 flow [2024-06-21 22:10:59,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 263 transitions, 3289 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 22:10:59,140 INFO L231 Difference]: Finished difference. Result has 182 places, 227 transitions, 2747 flow [2024-06-21 22:10:59,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2747, PETRI_PLACES=182, PETRI_TRANSITIONS=227} [2024-06-21 22:10:59,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 22:10:59,142 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 227 transitions, 2747 flow [2024-06-21 22:10:59,142 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 22:10:59,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:59,143 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 22:10:59,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:10:59,143 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 22:10:59,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash -675083721, now seen corresponding path program 4 times [2024-06-21 22:10:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:59,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992437117] [2024-06-21 22:10:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:59,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:01,861 INFO 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 22:11:01,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:01,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992437117] [2024-06-21 22:11:01,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992437117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:01,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:01,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:01,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464225407] [2024-06-21 22:11:01,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:01,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:01,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:01,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:01,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 227 transitions, 2747 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 22:11:01,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:01,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:01,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:03,396 INFO L124 PetriNetUnfolderBase]: 2238/3556 cut-off events. [2024-06-21 22:11:03,396 INFO L125 PetriNetUnfolderBase]: For 135353/135353 co-relation queries the response was YES. [2024-06-21 22:11:03,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22500 conditions, 3556 events. 2238/3556 cut-off events. For 135353/135353 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19746 event pairs, 575 based on Foata normal form. 8/3563 useless extension candidates. Maximal degree in co-relation 22416. Up to 3064 conditions per place. [2024-06-21 22:11:03,427 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 167 selfloop transitions, 100 changer transitions 0/272 dead transitions. [2024-06-21 22:11:03,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 272 transitions, 3692 flow [2024-06-21 22:11:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 22:11:03,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:11:03,429 INFO L175 Difference]: Start difference. First operand has 182 places, 227 transitions, 2747 flow. Second operand 10 states and 170 transitions. [2024-06-21 22:11:03,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 272 transitions, 3692 flow [2024-06-21 22:11:03,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 272 transitions, 3560 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:03,565 INFO L231 Difference]: Finished difference. Result has 185 places, 239 transitions, 3047 flow [2024-06-21 22:11:03,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2615, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3047, PETRI_PLACES=185, PETRI_TRANSITIONS=239} [2024-06-21 22:11:03,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 22:11:03,565 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 239 transitions, 3047 flow [2024-06-21 22:11:03,566 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 22:11:03,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:03,566 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 22:11:03,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:11:03,566 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 22:11:03,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:03,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2136274765, now seen corresponding path program 5 times [2024-06-21 22:11:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:03,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444194175] [2024-06-21 22:11:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:03,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:06,242 INFO 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 22:11:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444194175] [2024-06-21 22:11:06,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444194175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:06,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:06,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019272955] [2024-06-21 22:11:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:06,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:06,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 239 transitions, 3047 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 22:11:06,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:06,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:06,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:07,523 INFO L124 PetriNetUnfolderBase]: 2214/3524 cut-off events. [2024-06-21 22:11:07,524 INFO L125 PetriNetUnfolderBase]: For 135204/135204 co-relation queries the response was YES. [2024-06-21 22:11:07,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22562 conditions, 3524 events. 2214/3524 cut-off events. For 135204/135204 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19589 event pairs, 571 based on Foata normal form. 8/3531 useless extension candidates. Maximal degree in co-relation 22477. Up to 3048 conditions per place. [2024-06-21 22:11:07,557 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 94 changer transitions 0/268 dead transitions. [2024-06-21 22:11:07,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 268 transitions, 3688 flow [2024-06-21 22:11:07,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:07,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:11:07,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:11:07,559 INFO L175 Difference]: Start difference. First operand has 185 places, 239 transitions, 3047 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:11:07,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 268 transitions, 3688 flow [2024-06-21 22:11:07,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 268 transitions, 3451 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:07,751 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 3016 flow [2024-06-21 22:11:07,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3016, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-21 22:11:07,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 22:11:07,758 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 3016 flow [2024-06-21 22:11:07,758 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 22:11:07,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:07,758 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 22:11:07,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:11:07,758 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 22:11:07,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:07,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2136059439, now seen corresponding path program 2 times [2024-06-21 22:11:07,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:07,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667356210] [2024-06-21 22:11:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:07,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:11,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:11,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667356210] [2024-06-21 22:11:11,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667356210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:11,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:11,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229619698] [2024-06-21 22:11:11,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:11,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:11,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:11,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:11,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:11,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 3016 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 22:11:11,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:11,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:11,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:12,424 INFO L124 PetriNetUnfolderBase]: 2258/3592 cut-off events. [2024-06-21 22:11:12,424 INFO L125 PetriNetUnfolderBase]: For 138602/138602 co-relation queries the response was YES. [2024-06-21 22:11:12,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22955 conditions, 3592 events. 2258/3592 cut-off events. For 138602/138602 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20081 event pairs, 599 based on Foata normal form. 12/3603 useless extension candidates. Maximal degree in co-relation 22869. Up to 3168 conditions per place. [2024-06-21 22:11:12,456 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 66 changer transitions 0/271 dead transitions. [2024-06-21 22:11:12,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 271 transitions, 3731 flow [2024-06-21 22:11:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:11:12,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 22:11:12,458 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 3016 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:11:12,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 271 transitions, 3731 flow [2024-06-21 22:11:12,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 271 transitions, 3543 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:12,609 INFO L231 Difference]: Finished difference. Result has 187 places, 240 transitions, 2990 flow [2024-06-21 22:11:12,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2990, PETRI_PLACES=187, PETRI_TRANSITIONS=240} [2024-06-21 22:11:12,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 22:11:12,610 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 240 transitions, 2990 flow [2024-06-21 22:11:12,610 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 22:11:12,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:12,611 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 22:11:12,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:11:12,611 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 22:11:12,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:12,611 INFO L85 PathProgramCache]: Analyzing trace with hash 202559513, now seen corresponding path program 6 times [2024-06-21 22:11:12,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:12,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911035432] [2024-06-21 22:11:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:12,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:15,335 INFO 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 22:11:15,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:15,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911035432] [2024-06-21 22:11:15,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911035432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:15,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:15,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:15,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657164785] [2024-06-21 22:11:15,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:15,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:15,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:15,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:15,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 240 transitions, 2990 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 22:11:15,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:15,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:15,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:16,775 INFO L124 PetriNetUnfolderBase]: 2278/3632 cut-off events. [2024-06-21 22:11:16,775 INFO L125 PetriNetUnfolderBase]: For 136514/136514 co-relation queries the response was YES. [2024-06-21 22:11:16,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23234 conditions, 3632 events. 2278/3632 cut-off events. For 136514/136514 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 20267 event pairs, 536 based on Foata normal form. 4/3632 useless extension candidates. Maximal degree in co-relation 23147. Up to 2971 conditions per place. [2024-06-21 22:11:16,900 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 96 changer transitions 0/274 dead transitions. [2024-06-21 22:11:16,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 274 transitions, 3856 flow [2024-06-21 22:11:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:11:16,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:11:16,902 INFO L175 Difference]: Start difference. First operand has 187 places, 240 transitions, 2990 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:11:16,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 274 transitions, 3856 flow [2024-06-21 22:11:17,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 274 transitions, 3718 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:11:17,038 INFO L231 Difference]: Finished difference. Result has 189 places, 244 transitions, 3121 flow [2024-06-21 22:11:17,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3121, PETRI_PLACES=189, PETRI_TRANSITIONS=244} [2024-06-21 22:11:17,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-21 22:11:17,039 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 244 transitions, 3121 flow [2024-06-21 22:11:17,039 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 22:11:17,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:17,039 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 22:11:17,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:11:17,040 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 22:11:17,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash 556822553, now seen corresponding path program 7 times [2024-06-21 22:11:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:17,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232278476] [2024-06-21 22:11:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:19,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:19,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232278476] [2024-06-21 22:11:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232278476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:19,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:19,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:19,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343918216] [2024-06-21 22:11:19,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:19,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:19,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:19,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:19,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 244 transitions, 3121 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 22:11:19,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:19,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:19,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:20,943 INFO L124 PetriNetUnfolderBase]: 2330/3714 cut-off events. [2024-06-21 22:11:20,944 INFO L125 PetriNetUnfolderBase]: For 141883/141883 co-relation queries the response was YES. [2024-06-21 22:11:20,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24061 conditions, 3714 events. 2330/3714 cut-off events. For 141883/141883 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20776 event pairs, 536 based on Foata normal form. 4/3714 useless extension candidates. Maximal degree in co-relation 23973. Up to 3011 conditions per place. [2024-06-21 22:11:20,977 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 101 changer transitions 0/277 dead transitions. [2024-06-21 22:11:20,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 277 transitions, 4023 flow [2024-06-21 22:11:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 22:11:20,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 22:11:20,979 INFO L175 Difference]: Start difference. First operand has 189 places, 244 transitions, 3121 flow. Second operand 8 states and 143 transitions. [2024-06-21 22:11:20,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 277 transitions, 4023 flow [2024-06-21 22:11:21,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 277 transitions, 3813 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 22:11:21,160 INFO L231 Difference]: Finished difference. Result has 193 places, 250 transitions, 3229 flow [2024-06-21 22:11:21,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3229, PETRI_PLACES=193, PETRI_TRANSITIONS=250} [2024-06-21 22:11:21,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 22:11:21,161 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 250 transitions, 3229 flow [2024-06-21 22:11:21,161 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 22:11:21,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:21,162 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 22:11:21,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:11:21,162 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 22:11:21,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:21,162 INFO L85 PathProgramCache]: Analyzing trace with hash 391687691, now seen corresponding path program 8 times [2024-06-21 22:11:21,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:21,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324741060] [2024-06-21 22:11:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:21,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:23,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:23,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324741060] [2024-06-21 22:11:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324741060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:23,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:23,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:23,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560015958] [2024-06-21 22:11:23,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:23,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:23,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 250 transitions, 3229 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 22:11:23,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:23,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:23,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:24,930 INFO L124 PetriNetUnfolderBase]: 2318/3708 cut-off events. [2024-06-21 22:11:24,930 INFO L125 PetriNetUnfolderBase]: For 144003/144003 co-relation queries the response was YES. [2024-06-21 22:11:24,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23745 conditions, 3708 events. 2318/3708 cut-off events. For 144003/144003 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21142 event pairs, 913 based on Foata normal form. 4/3711 useless extension candidates. Maximal degree in co-relation 23655. Up to 3432 conditions per place. [2024-06-21 22:11:24,965 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-21 22:11:24,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 274 transitions, 3829 flow [2024-06-21 22:11:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:11:24,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:11:24,967 INFO L175 Difference]: Start difference. First operand has 193 places, 250 transitions, 3229 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:11:24,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 274 transitions, 3829 flow [2024-06-21 22:11:25,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 274 transitions, 3635 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 22:11:25,314 INFO L231 Difference]: Finished difference. Result has 197 places, 250 transitions, 3095 flow [2024-06-21 22:11:25,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3095, PETRI_PLACES=197, PETRI_TRANSITIONS=250} [2024-06-21 22:11:25,315 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-21 22:11:25,315 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 250 transitions, 3095 flow [2024-06-21 22:11:25,315 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 22:11:25,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:25,315 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 22:11:25,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 22:11:25,315 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 22:11:25,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:25,316 INFO L85 PathProgramCache]: Analyzing trace with hash 480005751, now seen corresponding path program 9 times [2024-06-21 22:11:25,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:25,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976970154] [2024-06-21 22:11:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:27,942 INFO 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 22:11:27,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:27,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976970154] [2024-06-21 22:11:27,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976970154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:27,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:27,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915221544] [2024-06-21 22:11:27,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:27,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:27,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:27,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:27,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 250 transitions, 3095 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 22:11:27,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:27,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:27,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:29,251 INFO L124 PetriNetUnfolderBase]: 2390/3784 cut-off events. [2024-06-21 22:11:29,251 INFO L125 PetriNetUnfolderBase]: For 154845/154845 co-relation queries the response was YES. [2024-06-21 22:11:29,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23885 conditions, 3784 events. 2390/3784 cut-off events. For 154845/154845 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21119 event pairs, 608 based on Foata normal form. 8/3785 useless extension candidates. Maximal degree in co-relation 23794. Up to 3134 conditions per place. [2024-06-21 22:11:29,285 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 117 changer transitions 0/287 dead transitions. [2024-06-21 22:11:29,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 287 transitions, 4089 flow [2024-06-21 22:11:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-21 22:11:29,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-21 22:11:29,292 INFO L175 Difference]: Start difference. First operand has 197 places, 250 transitions, 3095 flow. Second operand 10 states and 169 transitions. [2024-06-21 22:11:29,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 287 transitions, 4089 flow [2024-06-21 22:11:29,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 287 transitions, 4003 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:29,490 INFO L231 Difference]: Finished difference. Result has 200 places, 259 transitions, 3417 flow [2024-06-21 22:11:29,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3009, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3417, PETRI_PLACES=200, PETRI_TRANSITIONS=259} [2024-06-21 22:11:29,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 22:11:29,491 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 259 transitions, 3417 flow [2024-06-21 22:11:29,496 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 22:11:29,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:29,496 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 22:11:29,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 22:11:29,497 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 22:11:29,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:29,497 INFO L85 PathProgramCache]: Analyzing trace with hash 996980847, now seen corresponding path program 10 times [2024-06-21 22:11:29,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:29,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041577823] [2024-06-21 22:11:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:29,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:32,084 INFO 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 22:11:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:32,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041577823] [2024-06-21 22:11:32,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041577823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:32,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:32,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:32,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526134026] [2024-06-21 22:11:32,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:32,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:32,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:32,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:32,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:32,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 259 transitions, 3417 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 22:11:32,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:32,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:32,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:33,681 INFO L124 PetriNetUnfolderBase]: 2494/3945 cut-off events. [2024-06-21 22:11:33,682 INFO L125 PetriNetUnfolderBase]: For 172502/172502 co-relation queries the response was YES. [2024-06-21 22:11:33,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26006 conditions, 3945 events. 2494/3945 cut-off events. For 172502/172502 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 22388 event pairs, 1002 based on Foata normal form. 4/3948 useless extension candidates. Maximal degree in co-relation 25914. Up to 3650 conditions per place. [2024-06-21 22:11:33,721 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 33 changer transitions 0/302 dead transitions. [2024-06-21 22:11:33,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 302 transitions, 4488 flow [2024-06-21 22:11:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:11:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:11:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-21 22:11:33,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2024-06-21 22:11:33,723 INFO L175 Difference]: Start difference. First operand has 200 places, 259 transitions, 3417 flow. Second operand 12 states and 182 transitions. [2024-06-21 22:11:33,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 302 transitions, 4488 flow [2024-06-21 22:11:33,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 302 transitions, 4046 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-21 22:11:33,974 INFO L231 Difference]: Finished difference. Result has 206 places, 272 transitions, 3290 flow [2024-06-21 22:11:33,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3290, PETRI_PLACES=206, PETRI_TRANSITIONS=272} [2024-06-21 22:11:33,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 22:11:33,975 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 272 transitions, 3290 flow [2024-06-21 22:11:33,975 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 22:11:33,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:33,975 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 22:11:33,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 22:11:33,975 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 22:11:33,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 590817297, now seen corresponding path program 11 times [2024-06-21 22:11:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:33,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870447460] [2024-06-21 22:11:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:36,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870447460] [2024-06-21 22:11:36,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870447460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:36,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:36,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:36,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248216188] [2024-06-21 22:11:36,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:36,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:36,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:36,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 272 transitions, 3290 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 22:11:36,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:36,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:36,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:38,176 INFO L124 PetriNetUnfolderBase]: 2502/3944 cut-off events. [2024-06-21 22:11:38,177 INFO L125 PetriNetUnfolderBase]: For 168995/168995 co-relation queries the response was YES. [2024-06-21 22:11:38,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24989 conditions, 3944 events. 2502/3944 cut-off events. For 168995/168995 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22033 event pairs, 614 based on Foata normal form. 8/3945 useless extension candidates. Maximal degree in co-relation 24894. Up to 3214 conditions per place. [2024-06-21 22:11:38,217 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 135 changer transitions 0/305 dead transitions. [2024-06-21 22:11:38,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 305 transitions, 4212 flow [2024-06-21 22:11:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:11:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:11:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-21 22:11:38,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-21 22:11:38,219 INFO L175 Difference]: Start difference. First operand has 206 places, 272 transitions, 3290 flow. Second operand 11 states and 183 transitions. [2024-06-21 22:11:38,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 305 transitions, 4212 flow [2024-06-21 22:11:38,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 305 transitions, 4018 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-21 22:11:38,491 INFO L231 Difference]: Finished difference. Result has 207 places, 275 transitions, 3412 flow [2024-06-21 22:11:38,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3096, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3412, PETRI_PLACES=207, PETRI_TRANSITIONS=275} [2024-06-21 22:11:38,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 22:11:38,492 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 275 transitions, 3412 flow [2024-06-21 22:11:38,492 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 22:11:38,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:38,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:11:38,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 22:11:38,493 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 22:11:38,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash 990314607, now seen corresponding path program 12 times [2024-06-21 22:11:38,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:38,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552943976] [2024-06-21 22:11:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:41,303 INFO 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 22:11:41,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:41,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552943976] [2024-06-21 22:11:41,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552943976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:41,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:41,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:41,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214917080] [2024-06-21 22:11:41,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:41,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:41,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:41,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:41,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:41,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:41,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 275 transitions, 3412 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 22:11:41,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:41,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:41,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:42,711 INFO L124 PetriNetUnfolderBase]: 2490/3941 cut-off events. [2024-06-21 22:11:42,711 INFO L125 PetriNetUnfolderBase]: For 165613/165613 co-relation queries the response was YES. [2024-06-21 22:11:42,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25144 conditions, 3941 events. 2490/3941 cut-off events. For 165613/165613 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22389 event pairs, 996 based on Foata normal form. 4/3944 useless extension candidates. Maximal degree in co-relation 25049. Up to 3654 conditions per place. [2024-06-21 22:11:42,747 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 260 selfloop transitions, 33 changer transitions 0/298 dead transitions. [2024-06-21 22:11:42,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 298 transitions, 4152 flow [2024-06-21 22:11:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:42,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-21 22:11:42,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36428571428571427 [2024-06-21 22:11:42,749 INFO L175 Difference]: Start difference. First operand has 207 places, 275 transitions, 3412 flow. Second operand 10 states and 153 transitions. [2024-06-21 22:11:42,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 298 transitions, 4152 flow [2024-06-21 22:11:42,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 298 transitions, 3827 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 22:11:42,967 INFO L231 Difference]: Finished difference. Result has 208 places, 275 transitions, 3159 flow [2024-06-21 22:11:42,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3159, PETRI_PLACES=208, PETRI_TRANSITIONS=275} [2024-06-21 22:11:42,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 22:11:42,968 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 275 transitions, 3159 flow [2024-06-21 22:11:42,968 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 22:11:42,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:42,968 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 22:11:42,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 22:11:42,968 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 22:11:42,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash 797679057, now seen corresponding path program 13 times [2024-06-21 22:11:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:42,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807747757] [2024-06-21 22:11:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:45,570 INFO 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 22:11:45,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:45,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807747757] [2024-06-21 22:11:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807747757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:45,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:45,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:45,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656057734] [2024-06-21 22:11:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:45,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:45,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:45,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:45,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 275 transitions, 3159 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 22:11:45,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:45,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:45,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:46,717 INFO L124 PetriNetUnfolderBase]: 2478/3925 cut-off events. [2024-06-21 22:11:46,718 INFO L125 PetriNetUnfolderBase]: For 163780/163780 co-relation queries the response was YES. [2024-06-21 22:11:46,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24241 conditions, 3925 events. 2478/3925 cut-off events. For 163780/163780 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22319 event pairs, 994 based on Foata normal form. 4/3928 useless extension candidates. Maximal degree in co-relation 24147. Up to 3690 conditions per place. [2024-06-21 22:11:46,751 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 23 changer transitions 0/294 dead transitions. [2024-06-21 22:11:46,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 294 transitions, 3783 flow [2024-06-21 22:11:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 22:11:46,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:11:46,753 INFO L175 Difference]: Start difference. First operand has 208 places, 275 transitions, 3159 flow. Second operand 8 states and 128 transitions. [2024-06-21 22:11:46,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 294 transitions, 3783 flow [2024-06-21 22:11:47,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 294 transitions, 3699 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 22:11:47,022 INFO L231 Difference]: Finished difference. Result has 207 places, 275 transitions, 3127 flow [2024-06-21 22:11:47,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3127, PETRI_PLACES=207, PETRI_TRANSITIONS=275} [2024-06-21 22:11:47,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 22:11:47,022 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 275 transitions, 3127 flow [2024-06-21 22:11:47,023 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 22:11:47,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:47,023 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 22:11:47,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 22:11:47,023 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 22:11:47,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 675727385, now seen corresponding path program 14 times [2024-06-21 22:11:47,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:47,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243759792] [2024-06-21 22:11:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:47,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:49,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:49,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243759792] [2024-06-21 22:11:49,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243759792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:49,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:49,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:49,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511763646] [2024-06-21 22:11:49,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:49,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:49,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:49,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:49,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:49,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:49,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 275 transitions, 3127 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 22:11:49,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:49,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:49,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:50,769 INFO L124 PetriNetUnfolderBase]: 2466/3892 cut-off events. [2024-06-21 22:11:50,770 INFO L125 PetriNetUnfolderBase]: For 162549/162549 co-relation queries the response was YES. [2024-06-21 22:11:50,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23959 conditions, 3892 events. 2466/3892 cut-off events. For 162549/162549 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21696 event pairs, 622 based on Foata normal form. 4/3889 useless extension candidates. Maximal degree in co-relation 23864. Up to 3190 conditions per place. [2024-06-21 22:11:50,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 129 changer transitions 0/295 dead transitions. [2024-06-21 22:11:50,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 295 transitions, 3859 flow [2024-06-21 22:11:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:11:50,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:11:50,820 INFO L175 Difference]: Start difference. First operand has 207 places, 275 transitions, 3127 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:11:50,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 295 transitions, 3859 flow [2024-06-21 22:11:51,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 295 transitions, 3799 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:11:51,092 INFO L231 Difference]: Finished difference. Result has 209 places, 275 transitions, 3331 flow [2024-06-21 22:11:51,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3331, PETRI_PLACES=209, PETRI_TRANSITIONS=275} [2024-06-21 22:11:51,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 22:11:51,093 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 275 transitions, 3331 flow [2024-06-21 22:11:51,093 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 22:11:51,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:51,093 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 22:11:51,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 22:11:51,093 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 22:11:51,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:51,094 INFO L85 PathProgramCache]: Analyzing trace with hash 469289271, now seen corresponding path program 3 times [2024-06-21 22:11:51,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:51,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283697988] [2024-06-21 22:11:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:51,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:54,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:54,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283697988] [2024-06-21 22:11:54,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283697988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:54,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:54,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:54,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391422943] [2024-06-21 22:11:54,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:54,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:54,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:54,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:54,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:54,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 275 transitions, 3331 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 22:11:54,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:54,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:54,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:55,837 INFO L124 PetriNetUnfolderBase]: 2510/3964 cut-off events. [2024-06-21 22:11:55,837 INFO L125 PetriNetUnfolderBase]: For 181518/181518 co-relation queries the response was YES. [2024-06-21 22:11:55,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24892 conditions, 3964 events. 2510/3964 cut-off events. For 181518/181518 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 22308 event pairs, 646 based on Foata normal form. 12/3969 useless extension candidates. Maximal degree in co-relation 24796. Up to 3580 conditions per place. [2024-06-21 22:11:55,878 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 234 selfloop transitions, 60 changer transitions 0/299 dead transitions. [2024-06-21 22:11:55,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 299 transitions, 4055 flow [2024-06-21 22:11:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:11:55,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 22:11:55,879 INFO L175 Difference]: Start difference. First operand has 209 places, 275 transitions, 3331 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:11:55,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 299 transitions, 4055 flow [2024-06-21 22:11:56,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 299 transitions, 3775 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 22:11:56,199 INFO L231 Difference]: Finished difference. Result has 209 places, 276 transitions, 3197 flow [2024-06-21 22:11:56,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3051, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3197, PETRI_PLACES=209, PETRI_TRANSITIONS=276} [2024-06-21 22:11:56,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 22:11:56,200 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 276 transitions, 3197 flow [2024-06-21 22:11:56,200 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 22:11:56,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:56,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:11:56,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 22:11:56,200 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 22:11:56,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:56,201 INFO L85 PathProgramCache]: Analyzing trace with hash 882596151, now seen corresponding path program 4 times [2024-06-21 22:11:56,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:56,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628606165] [2024-06-21 22:11:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:56,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:59,174 INFO 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 22:11:59,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:59,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628606165] [2024-06-21 22:11:59,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628606165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:59,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:59,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706338798] [2024-06-21 22:11:59,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:59,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:59,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:59,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:59,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:59,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:59,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 276 transitions, 3197 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 22:11:59,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:59,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:59,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:00,542 INFO L124 PetriNetUnfolderBase]: 2554/4059 cut-off events. [2024-06-21 22:12:00,543 INFO L125 PetriNetUnfolderBase]: For 188563/188563 co-relation queries the response was YES. [2024-06-21 22:12:00,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25164 conditions, 4059 events. 2554/4059 cut-off events. For 188563/188563 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23304 event pairs, 1030 based on Foata normal form. 12/4070 useless extension candidates. Maximal degree in co-relation 25067. Up to 3800 conditions per place. [2024-06-21 22:12:00,584 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 274 selfloop transitions, 18 changer transitions 0/297 dead transitions. [2024-06-21 22:12:00,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 297 transitions, 3891 flow [2024-06-21 22:12:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:12:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:12:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 22:12:00,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 22:12:00,586 INFO L175 Difference]: Start difference. First operand has 209 places, 276 transitions, 3197 flow. Second operand 8 states and 126 transitions. [2024-06-21 22:12:00,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 297 transitions, 3891 flow [2024-06-21 22:12:00,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 297 transitions, 3767 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:00,865 INFO L231 Difference]: Finished difference. Result has 211 places, 277 transitions, 3137 flow [2024-06-21 22:12:00,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3073, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3137, PETRI_PLACES=211, PETRI_TRANSITIONS=277} [2024-06-21 22:12:00,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 22:12:00,866 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 277 transitions, 3137 flow [2024-06-21 22:12:00,866 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 22:12:00,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:00,866 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 22:12:00,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 22:12:00,867 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 22:12:00,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:00,867 INFO L85 PathProgramCache]: Analyzing trace with hash 602861293, now seen corresponding path program 5 times [2024-06-21 22:12:00,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:00,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268932757] [2024-06-21 22:12:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:00,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:04,471 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 22:12:04,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:04,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268932757] [2024-06-21 22:12:04,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268932757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:04,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:04,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228749779] [2024-06-21 22:12:04,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:04,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:04,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:04,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:04,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 277 transitions, 3137 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 22:12:04,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:04,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:04,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:05,894 INFO L124 PetriNetUnfolderBase]: 2556/4065 cut-off events. [2024-06-21 22:12:05,894 INFO L125 PetriNetUnfolderBase]: For 181087/181087 co-relation queries the response was YES. [2024-06-21 22:12:05,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24913 conditions, 4065 events. 2556/4065 cut-off events. For 181087/181087 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 23328 event pairs, 1010 based on Foata normal form. 8/4072 useless extension candidates. Maximal degree in co-relation 24815. Up to 3768 conditions per place. [2024-06-21 22:12:05,935 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2024-06-21 22:12:05,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 303 transitions, 3887 flow [2024-06-21 22:12:05,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:05,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 22:12:05,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 22:12:05,937 INFO L175 Difference]: Start difference. First operand has 211 places, 277 transitions, 3137 flow. Second operand 9 states and 141 transitions. [2024-06-21 22:12:05,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 303 transitions, 3887 flow [2024-06-21 22:12:06,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 303 transitions, 3845 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:06,280 INFO L231 Difference]: Finished difference. Result has 214 places, 278 transitions, 3165 flow [2024-06-21 22:12:06,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3165, PETRI_PLACES=214, PETRI_TRANSITIONS=278} [2024-06-21 22:12:06,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 22:12:06,283 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 278 transitions, 3165 flow [2024-06-21 22:12:06,283 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 22:12:06,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:06,283 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 22:12:06,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 22:12:06,283 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 22:12:06,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1004614287, now seen corresponding path program 1 times [2024-06-21 22:12:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506865454] [2024-06-21 22:12:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:06,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:09,515 INFO 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 22:12:09,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:09,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506865454] [2024-06-21 22:12:09,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506865454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:09,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:09,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:09,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217731489] [2024-06-21 22:12:09,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:09,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:09,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:09,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:09,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:09,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:09,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 278 transitions, 3165 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 22:12:09,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:09,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:09,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:10,842 INFO L124 PetriNetUnfolderBase]: 2566/4071 cut-off events. [2024-06-21 22:12:10,842 INFO L125 PetriNetUnfolderBase]: For 174845/174845 co-relation queries the response was YES. [2024-06-21 22:12:10,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24568 conditions, 4071 events. 2566/4071 cut-off events. For 174845/174845 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23248 event pairs, 988 based on Foata normal form. 8/4078 useless extension candidates. Maximal degree in co-relation 24469. Up to 3756 conditions per place. [2024-06-21 22:12:10,879 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 26 changer transitions 0/307 dead transitions. [2024-06-21 22:12:10,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 307 transitions, 3894 flow [2024-06-21 22:12:10,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:12:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:12:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-21 22:12:10,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528138528138528 [2024-06-21 22:12:10,881 INFO L175 Difference]: Start difference. First operand has 214 places, 278 transitions, 3165 flow. Second operand 11 states and 163 transitions. [2024-06-21 22:12:10,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 307 transitions, 3894 flow [2024-06-21 22:12:11,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 307 transitions, 3840 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 22:12:11,178 INFO L231 Difference]: Finished difference. Result has 219 places, 279 transitions, 3188 flow [2024-06-21 22:12:11,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3188, PETRI_PLACES=219, PETRI_TRANSITIONS=279} [2024-06-21 22:12:11,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 22:12:11,179 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 279 transitions, 3188 flow [2024-06-21 22:12:11,179 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 22:12:11,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:11,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:12:11,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 22:12:11,180 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 22:12:11,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:11,180 INFO L85 PathProgramCache]: Analyzing trace with hash 591250527, now seen corresponding path program 1 times [2024-06-21 22:12:11,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657122680] [2024-06-21 22:12:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:11,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:14,126 INFO 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 22:12:14,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657122680] [2024-06-21 22:12:14,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657122680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:14,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:14,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:14,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817590134] [2024-06-21 22:12:14,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:14,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:14,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:14,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 279 transitions, 3188 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:14,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:14,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:14,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:15,835 INFO L124 PetriNetUnfolderBase]: 2657/4220 cut-off events. [2024-06-21 22:12:15,836 INFO L125 PetriNetUnfolderBase]: For 173742/173742 co-relation queries the response was YES. [2024-06-21 22:12:15,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25557 conditions, 4220 events. 2657/4220 cut-off events. For 173742/173742 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 24129 event pairs, 681 based on Foata normal form. 2/4221 useless extension candidates. Maximal degree in co-relation 25456. Up to 3856 conditions per place. [2024-06-21 22:12:15,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 276 selfloop transitions, 62 changer transitions 0/343 dead transitions. [2024-06-21 22:12:15,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 343 transitions, 4354 flow [2024-06-21 22:12:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:12:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:12:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 22:12:15,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 22:12:15,874 INFO L175 Difference]: Start difference. First operand has 219 places, 279 transitions, 3188 flow. Second operand 10 states and 179 transitions. [2024-06-21 22:12:15,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 343 transitions, 4354 flow [2024-06-21 22:12:16,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 343 transitions, 4262 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 22:12:16,166 INFO L231 Difference]: Finished difference. Result has 222 places, 297 transitions, 3472 flow [2024-06-21 22:12:16,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3472, PETRI_PLACES=222, PETRI_TRANSITIONS=297} [2024-06-21 22:12:16,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-21 22:12:16,167 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 297 transitions, 3472 flow [2024-06-21 22:12:16,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:16,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:16,168 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 22:12:16,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 22:12:16,168 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 22:12:16,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash 103313405, now seen corresponding path program 2 times [2024-06-21 22:12:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:16,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233636842] [2024-06-21 22:12:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:19,247 INFO 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 22:12:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:19,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233636842] [2024-06-21 22:12:19,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233636842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:19,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:19,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253760866] [2024-06-21 22:12:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:19,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:19,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:19,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:19,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 297 transitions, 3472 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 22:12:19,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:19,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:19,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:20,673 INFO L124 PetriNetUnfolderBase]: 2665/4228 cut-off events. [2024-06-21 22:12:20,673 INFO L125 PetriNetUnfolderBase]: For 180125/180125 co-relation queries the response was YES. [2024-06-21 22:12:20,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 4228 events. 2665/4228 cut-off events. For 180125/180125 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24152 event pairs, 690 based on Foata normal form. 2/4229 useless extension candidates. Maximal degree in co-relation 25673. Up to 3864 conditions per place. [2024-06-21 22:12:20,712 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 64 changer transitions 0/341 dead transitions. [2024-06-21 22:12:20,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 341 transitions, 4448 flow [2024-06-21 22:12:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:12:20,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:12:20,714 INFO L175 Difference]: Start difference. First operand has 222 places, 297 transitions, 3472 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:12:20,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 341 transitions, 4448 flow [2024-06-21 22:12:20,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 341 transitions, 4360 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 22:12:20,993 INFO L231 Difference]: Finished difference. Result has 229 places, 300 transitions, 3578 flow [2024-06-21 22:12:20,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3578, PETRI_PLACES=229, PETRI_TRANSITIONS=300} [2024-06-21 22:12:20,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 22:12:20,994 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 300 transitions, 3578 flow [2024-06-21 22:12:20,994 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 22:12:20,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:20,994 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 22:12:20,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 22:12:20,994 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 22:12:20,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash 110931965, now seen corresponding path program 3 times [2024-06-21 22:12:20,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:20,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319414259] [2024-06-21 22:12:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:24,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:24,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319414259] [2024-06-21 22:12:24,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319414259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:24,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:24,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:24,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784798687] [2024-06-21 22:12:24,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:24,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:24,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:24,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:24,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:24,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 300 transitions, 3578 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 22:12:24,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:24,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:24,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:25,523 INFO L124 PetriNetUnfolderBase]: 2683/4258 cut-off events. [2024-06-21 22:12:25,523 INFO L125 PetriNetUnfolderBase]: For 186166/186166 co-relation queries the response was YES. [2024-06-21 22:12:25,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26248 conditions, 4258 events. 2683/4258 cut-off events. For 186166/186166 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 24356 event pairs, 704 based on Foata normal form. 2/4259 useless extension candidates. Maximal degree in co-relation 26143. Up to 3951 conditions per place. [2024-06-21 22:12:25,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 64 changer transitions 0/342 dead transitions. [2024-06-21 22:12:25,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 342 transitions, 4505 flow [2024-06-21 22:12:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 22:12:25,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 22:12:25,572 INFO L175 Difference]: Start difference. First operand has 229 places, 300 transitions, 3578 flow. Second operand 9 states and 157 transitions. [2024-06-21 22:12:25,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 342 transitions, 4505 flow [2024-06-21 22:12:25,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 342 transitions, 4395 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 22:12:25,897 INFO L231 Difference]: Finished difference. Result has 234 places, 310 transitions, 3779 flow [2024-06-21 22:12:25,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3779, PETRI_PLACES=234, PETRI_TRANSITIONS=310} [2024-06-21 22:12:25,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-21 22:12:25,898 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 310 transitions, 3779 flow [2024-06-21 22:12:25,899 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 22:12:25,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:25,899 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 22:12:25,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 22:12:25,899 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 22:12:25,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash 106173341, now seen corresponding path program 1 times [2024-06-21 22:12:25,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:25,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252259088] [2024-06-21 22:12:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:25,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:29,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:29,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252259088] [2024-06-21 22:12:29,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252259088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:29,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:29,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:29,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039401632] [2024-06-21 22:12:29,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:29,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:29,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:29,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:29,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 310 transitions, 3779 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 22:12:29,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:29,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:29,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:30,473 INFO L124 PetriNetUnfolderBase]: 2729/4324 cut-off events. [2024-06-21 22:12:30,473 INFO L125 PetriNetUnfolderBase]: For 187488/187488 co-relation queries the response was YES. [2024-06-21 22:12:30,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26579 conditions, 4324 events. 2729/4324 cut-off events. For 187488/187488 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24803 event pairs, 698 based on Foata normal form. 2/4325 useless extension candidates. Maximal degree in co-relation 26473. Up to 3979 conditions per place. [2024-06-21 22:12:30,515 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 69 changer transitions 0/356 dead transitions. [2024-06-21 22:12:30,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 356 transitions, 4701 flow [2024-06-21 22:12:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:12:30,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:12:30,517 INFO L175 Difference]: Start difference. First operand has 234 places, 310 transitions, 3779 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:12:30,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 356 transitions, 4701 flow [2024-06-21 22:12:30,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 356 transitions, 4559 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:30,830 INFO L231 Difference]: Finished difference. Result has 238 places, 319 transitions, 3915 flow [2024-06-21 22:12:30,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3915, PETRI_PLACES=238, PETRI_TRANSITIONS=319} [2024-06-21 22:12:30,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-21 22:12:30,831 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 319 transitions, 3915 flow [2024-06-21 22:12:30,831 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 22:12:30,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:30,831 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 22:12:30,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 22:12:30,832 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 22:12:30,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash -296686113, now seen corresponding path program 4 times [2024-06-21 22:12:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:30,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756770485] [2024-06-21 22:12:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:33,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:33,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756770485] [2024-06-21 22:12:33,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756770485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:33,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:33,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:33,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416417610] [2024-06-21 22:12:33,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:33,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:33,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:33,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:33,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:33,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:33,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 319 transitions, 3915 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 22:12:33,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:33,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:33,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:35,043 INFO L124 PetriNetUnfolderBase]: 2724/4311 cut-off events. [2024-06-21 22:12:35,043 INFO L125 PetriNetUnfolderBase]: For 190771/190771 co-relation queries the response was YES. [2024-06-21 22:12:35,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26884 conditions, 4311 events. 2724/4311 cut-off events. For 190771/190771 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24581 event pairs, 709 based on Foata normal form. 2/4312 useless extension candidates. Maximal degree in co-relation 26776. Up to 4010 conditions per place. [2024-06-21 22:12:35,084 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 67 changer transitions 0/345 dead transitions. [2024-06-21 22:12:35,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 345 transitions, 4671 flow [2024-06-21 22:12:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:12:35,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 22:12:35,087 INFO L175 Difference]: Start difference. First operand has 238 places, 319 transitions, 3915 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:12:35,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 345 transitions, 4671 flow [2024-06-21 22:12:35,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 345 transitions, 4479 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:35,438 INFO L231 Difference]: Finished difference. Result has 241 places, 319 transitions, 3863 flow [2024-06-21 22:12:35,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3863, PETRI_PLACES=241, PETRI_TRANSITIONS=319} [2024-06-21 22:12:35,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-21 22:12:35,445 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 319 transitions, 3863 flow [2024-06-21 22:12:35,445 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 22:12:35,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:35,445 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 22:12:35,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 22:12:35,445 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 22:12:35,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash -773405065, now seen corresponding path program 2 times [2024-06-21 22:12:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542866364] [2024-06-21 22:12:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:35,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:38,250 INFO 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 22:12:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:38,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542866364] [2024-06-21 22:12:38,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542866364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:38,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:38,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:38,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379555943] [2024-06-21 22:12:38,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:38,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:38,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:38,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:38,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:38,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:38,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 319 transitions, 3863 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 22:12:38,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:38,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:38,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:39,827 INFO L124 PetriNetUnfolderBase]: 2888/4575 cut-off events. [2024-06-21 22:12:39,827 INFO L125 PetriNetUnfolderBase]: For 208823/208825 co-relation queries the response was YES. [2024-06-21 22:12:39,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28492 conditions, 4575 events. 2888/4575 cut-off events. For 208823/208825 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26467 event pairs, 588 based on Foata normal form. 4/4578 useless extension candidates. Maximal degree in co-relation 28383. Up to 3696 conditions per place. [2024-06-21 22:12:39,875 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 253 selfloop transitions, 137 changer transitions 0/395 dead transitions. [2024-06-21 22:12:39,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 395 transitions, 5683 flow [2024-06-21 22:12:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 22:12:39,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 22:12:39,876 INFO L175 Difference]: Start difference. First operand has 241 places, 319 transitions, 3863 flow. Second operand 9 states and 174 transitions. [2024-06-21 22:12:39,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 395 transitions, 5683 flow [2024-06-21 22:12:40,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 395 transitions, 5547 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:40,247 INFO L231 Difference]: Finished difference. Result has 246 places, 346 transitions, 4456 flow [2024-06-21 22:12:40,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3727, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4456, PETRI_PLACES=246, PETRI_TRANSITIONS=346} [2024-06-21 22:12:40,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-21 22:12:40,247 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 346 transitions, 4456 flow [2024-06-21 22:12:40,247 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 22:12:40,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:40,248 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 22:12:40,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 22:12:40,248 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 22:12:40,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash 396626845, now seen corresponding path program 3 times [2024-06-21 22:12:40,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:40,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710660621] [2024-06-21 22:12:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:40,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:42,989 INFO 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 22:12:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710660621] [2024-06-21 22:12:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710660621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:42,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:42,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:42,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818319126] [2024-06-21 22:12:42,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:42,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:42,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:42,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:43,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:43,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 346 transitions, 4456 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 22:12:43,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:43,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:43,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:44,796 INFO L124 PetriNetUnfolderBase]: 2898/4587 cut-off events. [2024-06-21 22:12:44,797 INFO L125 PetriNetUnfolderBase]: For 219000/219002 co-relation queries the response was YES. [2024-06-21 22:12:44,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29695 conditions, 4587 events. 2898/4587 cut-off events. For 219000/219002 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 26493 event pairs, 590 based on Foata normal form. 4/4590 useless extension candidates. Maximal degree in co-relation 29583. Up to 3706 conditions per place. [2024-06-21 22:12:44,842 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 248 selfloop transitions, 141 changer transitions 0/394 dead transitions. [2024-06-21 22:12:44,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 394 transitions, 5960 flow [2024-06-21 22:12:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 22:12:44,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 22:12:44,844 INFO L175 Difference]: Start difference. First operand has 246 places, 346 transitions, 4456 flow. Second operand 9 states and 170 transitions. [2024-06-21 22:12:44,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 394 transitions, 5960 flow [2024-06-21 22:12:45,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 394 transitions, 5794 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-21 22:12:45,291 INFO L231 Difference]: Finished difference. Result has 253 places, 350 transitions, 4702 flow [2024-06-21 22:12:45,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4324, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4702, PETRI_PLACES=253, PETRI_TRANSITIONS=350} [2024-06-21 22:12:45,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-21 22:12:45,292 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 350 transitions, 4702 flow [2024-06-21 22:12:45,292 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 22:12:45,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:45,292 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 22:12:45,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 22:12:45,292 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 22:12:45,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash -291921537, now seen corresponding path program 4 times [2024-06-21 22:12:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:45,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828698258] [2024-06-21 22:12:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:45,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:48,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:48,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828698258] [2024-06-21 22:12:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828698258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:48,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:48,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220662770] [2024-06-21 22:12:48,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:48,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:48,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:48,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:48,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 350 transitions, 4702 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 22:12:48,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:48,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:48,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:49,747 INFO L124 PetriNetUnfolderBase]: 2892/4577 cut-off events. [2024-06-21 22:12:49,748 INFO L125 PetriNetUnfolderBase]: For 222077/222077 co-relation queries the response was YES. [2024-06-21 22:12:49,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29898 conditions, 4577 events. 2892/4577 cut-off events. For 222077/222077 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 26579 event pairs, 735 based on Foata normal form. 2/4578 useless extension candidates. Maximal degree in co-relation 29784. Up to 4222 conditions per place. [2024-06-21 22:12:49,803 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 296 selfloop transitions, 76 changer transitions 0/377 dead transitions. [2024-06-21 22:12:49,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 377 transitions, 5520 flow [2024-06-21 22:12:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 22:12:49,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:12:49,804 INFO L175 Difference]: Start difference. First operand has 253 places, 350 transitions, 4702 flow. Second operand 9 states and 153 transitions. [2024-06-21 22:12:49,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 377 transitions, 5520 flow [2024-06-21 22:12:50,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 377 transitions, 5281 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-21 22:12:50,297 INFO L231 Difference]: Finished difference. Result has 258 places, 350 transitions, 4621 flow [2024-06-21 22:12:50,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4463, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4621, PETRI_PLACES=258, PETRI_TRANSITIONS=350} [2024-06-21 22:12:50,298 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 22:12:50,298 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 350 transitions, 4621 flow [2024-06-21 22:12:50,298 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 22:12:50,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:50,298 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 22:12:50,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 22:12:50,299 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 22:12:50,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:50,299 INFO L85 PathProgramCache]: Analyzing trace with hash -901854193, now seen corresponding path program 5 times [2024-06-21 22:12:50,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:50,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081411723] [2024-06-21 22:12:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:50,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:52,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:52,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081411723] [2024-06-21 22:12:52,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081411723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:52,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:52,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:52,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708315471] [2024-06-21 22:12:52,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:52,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:52,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:52,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:52,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:52,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 350 transitions, 4621 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 22:12:52,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:52,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:52,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:54,142 INFO L124 PetriNetUnfolderBase]: 2979/4725 cut-off events. [2024-06-21 22:12:54,143 INFO L125 PetriNetUnfolderBase]: For 233888/233888 co-relation queries the response was YES. [2024-06-21 22:12:54,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30576 conditions, 4725 events. 2979/4725 cut-off events. For 233888/233888 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27700 event pairs, 755 based on Foata normal form. 2/4726 useless extension candidates. Maximal degree in co-relation 30461. Up to 4306 conditions per place. [2024-06-21 22:12:54,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 79 changer transitions 0/410 dead transitions. [2024-06-21 22:12:54,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 410 transitions, 5962 flow [2024-06-21 22:12:54,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:12:54,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:12:54,191 INFO L175 Difference]: Start difference. First operand has 258 places, 350 transitions, 4621 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:12:54,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 410 transitions, 5962 flow [2024-06-21 22:12:54,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 410 transitions, 5798 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 22:12:54,724 INFO L231 Difference]: Finished difference. Result has 262 places, 368 transitions, 4962 flow [2024-06-21 22:12:54,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4962, PETRI_PLACES=262, PETRI_TRANSITIONS=368} [2024-06-21 22:12:54,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-21 22:12:54,724 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 368 transitions, 4962 flow [2024-06-21 22:12:54,725 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 22:12:54,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:54,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:12:54,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 22:12:54,725 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 22:12:54,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash -893543713, now seen corresponding path program 6 times [2024-06-21 22:12:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:54,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940430591] [2024-06-21 22:12:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:54,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:57,335 INFO 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 22:12:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:57,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940430591] [2024-06-21 22:12:57,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940430591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:57,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:57,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:57,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830157943] [2024-06-21 22:12:57,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:57,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:57,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:57,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:57,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:57,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 368 transitions, 4962 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 22:12:57,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:57,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:57,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:58,849 INFO L124 PetriNetUnfolderBase]: 2974/4722 cut-off events. [2024-06-21 22:12:58,849 INFO L125 PetriNetUnfolderBase]: For 237389/237389 co-relation queries the response was YES. [2024-06-21 22:12:58,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30878 conditions, 4722 events. 2974/4722 cut-off events. For 237389/237389 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 27679 event pairs, 767 based on Foata normal form. 2/4723 useless extension candidates. Maximal degree in co-relation 30760. Up to 4366 conditions per place. [2024-06-21 22:12:58,896 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 323 selfloop transitions, 74 changer transitions 0/402 dead transitions. [2024-06-21 22:12:58,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 402 transitions, 5871 flow [2024-06-21 22:12:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:58,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:12:58,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 22:12:58,898 INFO L175 Difference]: Start difference. First operand has 262 places, 368 transitions, 4962 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:12:58,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 402 transitions, 5871 flow [2024-06-21 22:12:59,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 402 transitions, 5671 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:59,414 INFO L231 Difference]: Finished difference. Result has 266 places, 369 transitions, 4948 flow [2024-06-21 22:12:59,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4762, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4948, PETRI_PLACES=266, PETRI_TRANSITIONS=369} [2024-06-21 22:12:59,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 22:12:59,416 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 369 transitions, 4948 flow [2024-06-21 22:12:59,416 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 22:12:59,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:59,416 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 22:12:59,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 22:12:59,424 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 22:12:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 819648479, now seen corresponding path program 7 times [2024-06-21 22:12:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572713669] [2024-06-21 22:12:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:59,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:01,651 INFO 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 22:13:01,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572713669] [2024-06-21 22:13:01,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572713669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:01,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:01,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:01,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481773389] [2024-06-21 22:13:01,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:01,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:01,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:01,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:01,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:01,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:01,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 369 transitions, 4948 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 22:13:01,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:01,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:01,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:03,105 INFO L124 PetriNetUnfolderBase]: 3026/4804 cut-off events. [2024-06-21 22:13:03,105 INFO L125 PetriNetUnfolderBase]: For 243693/243693 co-relation queries the response was YES. [2024-06-21 22:13:03,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31262 conditions, 4804 events. 3026/4804 cut-off events. For 243693/243693 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 28091 event pairs, 644 based on Foata normal form. 2/4805 useless extension candidates. Maximal degree in co-relation 31144. Up to 4209 conditions per place. [2024-06-21 22:13:03,246 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 99 changer transitions 0/420 dead transitions. [2024-06-21 22:13:03,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 420 transitions, 6185 flow [2024-06-21 22:13:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:13:03,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:13:03,248 INFO L175 Difference]: Start difference. First operand has 266 places, 369 transitions, 4948 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:13:03,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 420 transitions, 6185 flow [2024-06-21 22:13:03,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 420 transitions, 6048 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 22:13:03,777 INFO L231 Difference]: Finished difference. Result has 271 places, 380 transitions, 5231 flow [2024-06-21 22:13:03,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5231, PETRI_PLACES=271, PETRI_TRANSITIONS=380} [2024-06-21 22:13:03,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 22:13:03,778 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 380 transitions, 5231 flow [2024-06-21 22:13:03,778 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 22:13:03,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:03,778 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 22:13:03,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 22:13:03,779 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 22:13:03,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:03,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1622463455, now seen corresponding path program 5 times [2024-06-21 22:13:03,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:03,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273722832] [2024-06-21 22:13:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:03,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:06,079 INFO 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 22:13:06,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:06,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273722832] [2024-06-21 22:13:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273722832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:06,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:06,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:06,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913323851] [2024-06-21 22:13:06,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:06,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:06,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:06,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:06,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:06,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 380 transitions, 5231 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 22:13:06,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:06,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:06,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:07,991 INFO L124 PetriNetUnfolderBase]: 3118/4938 cut-off events. [2024-06-21 22:13:07,991 INFO L125 PetriNetUnfolderBase]: For 258052/258052 co-relation queries the response was YES. [2024-06-21 22:13:08,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32830 conditions, 4938 events. 3118/4938 cut-off events. For 258052/258052 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29131 event pairs, 765 based on Foata normal form. 2/4939 useless extension candidates. Maximal degree in co-relation 32709. Up to 4394 conditions per place. [2024-06-21 22:13:08,050 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 332 selfloop transitions, 116 changer transitions 0/453 dead transitions. [2024-06-21 22:13:08,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 453 transitions, 6868 flow [2024-06-21 22:13:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:13:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:13:08,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 22:13:08,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-21 22:13:08,052 INFO L175 Difference]: Start difference. First operand has 271 places, 380 transitions, 5231 flow. Second operand 11 states and 200 transitions. [2024-06-21 22:13:08,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 453 transitions, 6868 flow [2024-06-21 22:13:08,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 453 transitions, 6704 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 22:13:08,678 INFO L231 Difference]: Finished difference. Result has 280 places, 402 transitions, 5695 flow [2024-06-21 22:13:08,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5077, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5695, PETRI_PLACES=280, PETRI_TRANSITIONS=402} [2024-06-21 22:13:08,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 22:13:08,678 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 402 transitions, 5695 flow [2024-06-21 22:13:08,679 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 22:13:08,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:08,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:08,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 22:13:08,679 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 22:13:08,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:08,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1496815145, now seen corresponding path program 1 times [2024-06-21 22:13:08,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:08,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708136085] [2024-06-21 22:13:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:11,666 INFO 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 22:13:11,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:11,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708136085] [2024-06-21 22:13:11,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708136085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:11,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:11,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:11,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73629385] [2024-06-21 22:13:11,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:11,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:11,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:11,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:11,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:11,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:11,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 402 transitions, 5695 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 22:13:11,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:11,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:11,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:13,594 INFO L124 PetriNetUnfolderBase]: 3159/5023 cut-off events. [2024-06-21 22:13:13,594 INFO L125 PetriNetUnfolderBase]: For 270280/270282 co-relation queries the response was YES. [2024-06-21 22:13:13,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33846 conditions, 5023 events. 3159/5023 cut-off events. For 270280/270282 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29716 event pairs, 686 based on Foata normal form. 4/5026 useless extension candidates. Maximal degree in co-relation 33721. Up to 4491 conditions per place. [2024-06-21 22:13:13,644 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 76 changer transitions 0/450 dead transitions. [2024-06-21 22:13:13,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 450 transitions, 6952 flow [2024-06-21 22:13:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 22:13:13,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 22:13:13,648 INFO L175 Difference]: Start difference. First operand has 280 places, 402 transitions, 5695 flow. Second operand 9 states and 166 transitions. [2024-06-21 22:13:13,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 450 transitions, 6952 flow [2024-06-21 22:13:14,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 450 transitions, 6683 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 22:13:14,309 INFO L231 Difference]: Finished difference. Result has 283 places, 408 transitions, 5680 flow [2024-06-21 22:13:14,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5426, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5680, PETRI_PLACES=283, PETRI_TRANSITIONS=408} [2024-06-21 22:13:14,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 22:13:14,309 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 408 transitions, 5680 flow [2024-06-21 22:13:14,310 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 22:13:14,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:14,310 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 22:13:14,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 22:13:14,310 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 22:13:14,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:14,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1496875595, now seen corresponding path program 2 times [2024-06-21 22:13:14,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:14,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511556273] [2024-06-21 22:13:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:14,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:17,354 INFO 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 22:13:17,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511556273] [2024-06-21 22:13:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511556273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:17,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:17,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600872668] [2024-06-21 22:13:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:17,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:17,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:17,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 408 transitions, 5680 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 22:13:17,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:17,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:17,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:18,991 INFO L124 PetriNetUnfolderBase]: 3167/5041 cut-off events. [2024-06-21 22:13:18,992 INFO L125 PetriNetUnfolderBase]: For 276584/276586 co-relation queries the response was YES. [2024-06-21 22:13:19,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34002 conditions, 5041 events. 3167/5041 cut-off events. For 276584/276586 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 29923 event pairs, 694 based on Foata normal form. 4/5044 useless extension candidates. Maximal degree in co-relation 33875. Up to 4538 conditions per place. [2024-06-21 22:13:19,049 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 73 changer transitions 0/447 dead transitions. [2024-06-21 22:13:19,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 447 transitions, 6735 flow [2024-06-21 22:13:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:13:19,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 22:13:19,051 INFO L175 Difference]: Start difference. First operand has 283 places, 408 transitions, 5680 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:13:19,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 447 transitions, 6735 flow [2024-06-21 22:13:19,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 447 transitions, 6583 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 22:13:19,777 INFO L231 Difference]: Finished difference. Result has 287 places, 410 transitions, 5725 flow [2024-06-21 22:13:19,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5725, PETRI_PLACES=287, PETRI_TRANSITIONS=410} [2024-06-21 22:13:19,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 22:13:19,778 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 410 transitions, 5725 flow [2024-06-21 22:13:19,778 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 22:13:19,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:19,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:19,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 22:13:19,779 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 22:13:19,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash 457419301, now seen corresponding path program 3 times [2024-06-21 22:13:19,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:19,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340813854] [2024-06-21 22:13:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:19,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:22,906 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 22:13:22,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340813854] [2024-06-21 22:13:22,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340813854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:22,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:22,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:22,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811514426] [2024-06-21 22:13:22,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:22,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:22,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:22,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:22,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:22,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 410 transitions, 5725 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 22:13:22,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:22,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:22,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:24,483 INFO L124 PetriNetUnfolderBase]: 3198/5051 cut-off events. [2024-06-21 22:13:24,484 INFO L125 PetriNetUnfolderBase]: For 303107/303107 co-relation queries the response was YES. [2024-06-21 22:13:24,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34375 conditions, 5051 events. 3198/5051 cut-off events. For 303107/303107 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 29806 event pairs, 779 based on Foata normal form. 12/5062 useless extension candidates. Maximal degree in co-relation 34246. Up to 4624 conditions per place. [2024-06-21 22:13:24,545 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 85 changer transitions 0/442 dead transitions. [2024-06-21 22:13:24,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 442 transitions, 6753 flow [2024-06-21 22:13:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:13:24,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 22:13:24,547 INFO L175 Difference]: Start difference. First operand has 287 places, 410 transitions, 5725 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:13:24,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 442 transitions, 6753 flow [2024-06-21 22:13:25,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 442 transitions, 6584 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 22:13:25,181 INFO L231 Difference]: Finished difference. Result has 289 places, 411 transitions, 5760 flow [2024-06-21 22:13:25,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5760, PETRI_PLACES=289, PETRI_TRANSITIONS=411} [2024-06-21 22:13:25,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 22:13:25,181 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 411 transitions, 5760 flow [2024-06-21 22:13:25,181 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 22:13:25,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:25,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:25,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 22:13:25,182 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 22:13:25,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 634692865, now seen corresponding path program 8 times [2024-06-21 22:13:25,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:25,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485478639] [2024-06-21 22:13:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:28,111 INFO 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 22:13:28,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:28,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485478639] [2024-06-21 22:13:28,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485478639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:28,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:28,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:28,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638063778] [2024-06-21 22:13:28,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:28,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:28,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:28,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:28,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:28,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 411 transitions, 5760 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 22:13:28,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:28,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:28,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:29,876 INFO L124 PetriNetUnfolderBase]: 3206/5074 cut-off events. [2024-06-21 22:13:29,876 INFO L125 PetriNetUnfolderBase]: For 286370/286370 co-relation queries the response was YES. [2024-06-21 22:13:29,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34573 conditions, 5074 events. 3206/5074 cut-off events. For 286370/286370 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29846 event pairs, 683 based on Foata normal form. 2/5075 useless extension candidates. Maximal degree in co-relation 34443. Up to 4471 conditions per place. [2024-06-21 22:13:29,931 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 339 selfloop transitions, 102 changer transitions 0/446 dead transitions. [2024-06-21 22:13:29,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 446 transitions, 6938 flow [2024-06-21 22:13:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:13:29,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:13:29,933 INFO L175 Difference]: Start difference. First operand has 289 places, 411 transitions, 5760 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:13:29,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 446 transitions, 6938 flow [2024-06-21 22:13:30,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 446 transitions, 6768 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 22:13:30,660 INFO L231 Difference]: Finished difference. Result has 290 places, 413 transitions, 5859 flow [2024-06-21 22:13:30,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5590, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5859, PETRI_PLACES=290, PETRI_TRANSITIONS=413} [2024-06-21 22:13:30,661 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 22:13:30,661 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 413 transitions, 5859 flow [2024-06-21 22:13:30,661 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 22:13:30,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:30,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:30,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 22:13:30,661 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 22:13:30,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:30,662 INFO L85 PathProgramCache]: Analyzing trace with hash -25823693, now seen corresponding path program 9 times [2024-06-21 22:13:30,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:30,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824484997] [2024-06-21 22:13:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:30,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:33,601 INFO 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 22:13:33,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:33,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824484997] [2024-06-21 22:13:33,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824484997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:33,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:33,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:33,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062311933] [2024-06-21 22:13:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:33,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:33,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:33,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:33,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 413 transitions, 5859 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 22:13:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:33,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:35,223 INFO L124 PetriNetUnfolderBase]: 3219/5099 cut-off events. [2024-06-21 22:13:35,224 INFO L125 PetriNetUnfolderBase]: For 294107/294107 co-relation queries the response was YES. [2024-06-21 22:13:35,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35040 conditions, 5099 events. 3219/5099 cut-off events. For 294107/294107 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 30244 event pairs, 807 based on Foata normal form. 2/5100 useless extension candidates. Maximal degree in co-relation 34909. Up to 4720 conditions per place. [2024-06-21 22:13:35,284 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 359 selfloop transitions, 81 changer transitions 0/445 dead transitions. [2024-06-21 22:13:35,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 445 transitions, 6943 flow [2024-06-21 22:13:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:13:35,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 22:13:35,285 INFO L175 Difference]: Start difference. First operand has 290 places, 413 transitions, 5859 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:13:35,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 445 transitions, 6943 flow [2024-06-21 22:13:35,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 445 transitions, 6745 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 22:13:35,919 INFO L231 Difference]: Finished difference. Result has 291 places, 418 transitions, 5957 flow [2024-06-21 22:13:35,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5957, PETRI_PLACES=291, PETRI_TRANSITIONS=418} [2024-06-21 22:13:35,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 22:13:35,920 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 418 transitions, 5957 flow [2024-06-21 22:13:35,920 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 22:13:35,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:35,920 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 22:13:35,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 22:13:35,920 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 22:13:35,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:35,921 INFO L85 PathProgramCache]: Analyzing trace with hash 536036915, now seen corresponding path program 10 times [2024-06-21 22:13:35,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:35,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906418149] [2024-06-21 22:13:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:35,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:39,426 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 22:13:39,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:39,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906418149] [2024-06-21 22:13:39,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906418149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:39,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:39,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:39,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772191] [2024-06-21 22:13:39,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:39,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:39,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:39,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:39,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:39,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:39,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 418 transitions, 5957 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 22:13:39,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:39,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:39,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:41,037 INFO L124 PetriNetUnfolderBase]: 3227/5102 cut-off events. [2024-06-21 22:13:41,037 INFO L125 PetriNetUnfolderBase]: For 280718/280718 co-relation queries the response was YES. [2024-06-21 22:13:41,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34824 conditions, 5102 events. 3227/5102 cut-off events. For 280718/280718 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30178 event pairs, 791 based on Foata normal form. 2/5103 useless extension candidates. Maximal degree in co-relation 34694. Up to 4746 conditions per place. [2024-06-21 22:13:41,098 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 359 selfloop transitions, 77 changer transitions 0/441 dead transitions. [2024-06-21 22:13:41,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 441 transitions, 6960 flow [2024-06-21 22:13:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 22:13:41,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 22:13:41,100 INFO L175 Difference]: Start difference. First operand has 291 places, 418 transitions, 5957 flow. Second operand 8 states and 131 transitions. [2024-06-21 22:13:41,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 441 transitions, 6960 flow [2024-06-21 22:13:41,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 441 transitions, 6849 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 22:13:41,773 INFO L231 Difference]: Finished difference. Result has 295 places, 421 transitions, 6117 flow [2024-06-21 22:13:41,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5846, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6117, PETRI_PLACES=295, PETRI_TRANSITIONS=421} [2024-06-21 22:13:41,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 22:13:41,774 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 421 transitions, 6117 flow [2024-06-21 22:13:41,774 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 22:13:41,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:41,774 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 22:13:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 22:13:41,774 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 22:13:41,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash -267947071, now seen corresponding path program 6 times [2024-06-21 22:13:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:41,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901213480] [2024-06-21 22:13:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:44,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:44,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901213480] [2024-06-21 22:13:44,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901213480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:44,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:44,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:44,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616657261] [2024-06-21 22:13:44,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:44,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:44,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:44,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:44,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:44,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 421 transitions, 6117 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 22:13:44,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:44,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:44,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:46,359 INFO L124 PetriNetUnfolderBase]: 3215/5095 cut-off events. [2024-06-21 22:13:46,359 INFO L125 PetriNetUnfolderBase]: For 271067/271067 co-relation queries the response was YES. [2024-06-21 22:13:46,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34391 conditions, 5095 events. 3215/5095 cut-off events. For 271067/271067 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 30325 event pairs, 772 based on Foata normal form. 4/5098 useless extension candidates. Maximal degree in co-relation 34261. Up to 4548 conditions per place. [2024-06-21 22:13:46,422 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 117 changer transitions 0/453 dead transitions. [2024-06-21 22:13:46,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 453 transitions, 7123 flow [2024-06-21 22:13:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:13:46,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:13:46,424 INFO L175 Difference]: Start difference. First operand has 295 places, 421 transitions, 6117 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:13:46,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 453 transitions, 7123 flow [2024-06-21 22:13:47,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 453 transitions, 6962 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 22:13:47,184 INFO L231 Difference]: Finished difference. Result has 298 places, 421 transitions, 6214 flow [2024-06-21 22:13:47,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6214, PETRI_PLACES=298, PETRI_TRANSITIONS=421} [2024-06-21 22:13:47,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 22:13:47,184 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 421 transitions, 6214 flow [2024-06-21 22:13:47,185 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 22:13:47,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:47,185 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 22:13:47,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 22:13:47,185 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 22:13:47,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 84708853, now seen corresponding path program 7 times [2024-06-21 22:13:47,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:47,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876751107] [2024-06-21 22:13:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:47,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:50,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:50,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876751107] [2024-06-21 22:13:50,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876751107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:50,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:50,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13090581] [2024-06-21 22:13:50,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:50,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:50,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:50,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:50,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:50,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 421 transitions, 6214 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 22:13:50,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:50,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:50,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:51,928 INFO L124 PetriNetUnfolderBase]: 3267/5180 cut-off events. [2024-06-21 22:13:51,928 INFO L125 PetriNetUnfolderBase]: For 283878/283880 co-relation queries the response was YES. [2024-06-21 22:13:51,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35547 conditions, 5180 events. 3267/5180 cut-off events. For 283878/283880 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 30770 event pairs, 634 based on Foata normal form. 6/5185 useless extension candidates. Maximal degree in co-relation 35417. Up to 4184 conditions per place. [2024-06-21 22:13:51,990 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 186 changer transitions 0/469 dead transitions. [2024-06-21 22:13:51,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 469 transitions, 7837 flow [2024-06-21 22:13:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 22:13:51,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 22:13:51,992 INFO L175 Difference]: Start difference. First operand has 298 places, 421 transitions, 6214 flow. Second operand 8 states and 150 transitions. [2024-06-21 22:13:51,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 469 transitions, 7837 flow [2024-06-21 22:13:52,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 469 transitions, 7626 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 22:13:52,867 INFO L231 Difference]: Finished difference. Result has 300 places, 433 transitions, 6676 flow [2024-06-21 22:13:52,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6676, PETRI_PLACES=300, PETRI_TRANSITIONS=433} [2024-06-21 22:13:52,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 22:13:52,867 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 433 transitions, 6676 flow [2024-06-21 22:13:52,868 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 22:13:52,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:52,868 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 22:13:52,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 22:13:52,868 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 22:13:52,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash 22506433, now seen corresponding path program 8 times [2024-06-21 22:13:52,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:52,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136138233] [2024-06-21 22:13:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:55,646 INFO 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 22:13:55,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:55,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136138233] [2024-06-21 22:13:55,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136138233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:55,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:55,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:55,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846713109] [2024-06-21 22:13:55,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:55,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:55,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:55,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:55,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 433 transitions, 6676 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 22:13:55,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:55,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:55,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:57,449 INFO L124 PetriNetUnfolderBase]: 3271/5184 cut-off events. [2024-06-21 22:13:57,450 INFO L125 PetriNetUnfolderBase]: For 281343/281345 co-relation queries the response was YES. [2024-06-21 22:13:57,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35836 conditions, 5184 events. 3271/5184 cut-off events. For 281343/281345 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 30826 event pairs, 631 based on Foata normal form. 6/5189 useless extension candidates. Maximal degree in co-relation 35706. Up to 4189 conditions per place. [2024-06-21 22:13:57,509 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 274 selfloop transitions, 189 changer transitions 0/468 dead transitions. [2024-06-21 22:13:57,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 468 transitions, 8072 flow [2024-06-21 22:13:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:13:57,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:13:57,511 INFO L175 Difference]: Start difference. First operand has 300 places, 433 transitions, 6676 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:13:57,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 468 transitions, 8072 flow [2024-06-21 22:13:58,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 468 transitions, 7611 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-06-21 22:13:58,346 INFO L231 Difference]: Finished difference. Result has 302 places, 436 transitions, 6688 flow [2024-06-21 22:13:58,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6242, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6688, PETRI_PLACES=302, PETRI_TRANSITIONS=436} [2024-06-21 22:13:58,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 22:13:58,347 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 436 transitions, 6688 flow [2024-06-21 22:13:58,347 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 22:13:58,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:58,347 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 22:13:58,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 22:13:58,347 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 22:13:58,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash 953423581, now seen corresponding path program 9 times [2024-06-21 22:13:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:58,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440650416] [2024-06-21 22:13:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:01,394 INFO 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 22:14:01,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:01,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440650416] [2024-06-21 22:14:01,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440650416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:01,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:01,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441902142] [2024-06-21 22:14:01,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:01,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:01,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:01,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 436 transitions, 6688 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 22:14:01,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:01,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:01,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:03,131 INFO L124 PetriNetUnfolderBase]: 3281/5194 cut-off events. [2024-06-21 22:14:03,132 INFO L125 PetriNetUnfolderBase]: For 277046/277046 co-relation queries the response was YES. [2024-06-21 22:14:03,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35698 conditions, 5194 events. 3281/5194 cut-off events. For 277046/277046 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30992 event pairs, 792 based on Foata normal form. 2/5195 useless extension candidates. Maximal degree in co-relation 35569. Up to 4772 conditions per place. [2024-06-21 22:14:03,197 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 95 changer transitions 0/460 dead transitions. [2024-06-21 22:14:03,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 460 transitions, 7724 flow [2024-06-21 22:14:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:14:03,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 22:14:03,200 INFO L175 Difference]: Start difference. First operand has 302 places, 436 transitions, 6688 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:14:03,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 460 transitions, 7724 flow [2024-06-21 22:14:04,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 460 transitions, 7340 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 22:14:04,111 INFO L231 Difference]: Finished difference. Result has 303 places, 439 transitions, 6570 flow [2024-06-21 22:14:04,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6570, PETRI_PLACES=303, PETRI_TRANSITIONS=439} [2024-06-21 22:14:04,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-21 22:14:04,112 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 439 transitions, 6570 flow [2024-06-21 22:14:04,112 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 22:14:04,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:04,113 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 22:14:04,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 22:14:04,113 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 22:14:04,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:04,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1450364959, now seen corresponding path program 11 times [2024-06-21 22:14:04,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:04,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418330273] [2024-06-21 22:14:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:04,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:07,726 INFO 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 22:14:07,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:07,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418330273] [2024-06-21 22:14:07,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418330273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:07,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:07,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:07,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290545816] [2024-06-21 22:14:07,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:07,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:07,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:07,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:07,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:07,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:07,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 439 transitions, 6570 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 22:14:07,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:07,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:07,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:09,361 INFO L124 PetriNetUnfolderBase]: 3276/5179 cut-off events. [2024-06-21 22:14:09,361 INFO L125 PetriNetUnfolderBase]: For 270999/270999 co-relation queries the response was YES. [2024-06-21 22:14:09,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35010 conditions, 5179 events. 3276/5179 cut-off events. For 270999/270999 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 30731 event pairs, 818 based on Foata normal form. 2/5173 useless extension candidates. Maximal degree in co-relation 34881. Up to 4823 conditions per place. [2024-06-21 22:14:09,423 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 374 selfloop transitions, 73 changer transitions 0/452 dead transitions. [2024-06-21 22:14:09,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 452 transitions, 7502 flow [2024-06-21 22:14:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:09,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:09,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 22:14:09,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 22:14:09,425 INFO L175 Difference]: Start difference. First operand has 303 places, 439 transitions, 6570 flow. Second operand 8 states and 123 transitions. [2024-06-21 22:14:09,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 452 transitions, 7502 flow [2024-06-21 22:14:10,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 452 transitions, 7256 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 22:14:10,071 INFO L231 Difference]: Finished difference. Result has 304 places, 439 transitions, 6475 flow [2024-06-21 22:14:10,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6324, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6475, PETRI_PLACES=304, PETRI_TRANSITIONS=439} [2024-06-21 22:14:10,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 22:14:10,071 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 439 transitions, 6475 flow [2024-06-21 22:14:10,072 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 22:14:10,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:10,072 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 22:14:10,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 22:14:10,072 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 22:14:10,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1974843859, now seen corresponding path program 10 times [2024-06-21 22:14:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:10,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574759345] [2024-06-21 22:14:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:10,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:13,338 INFO 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 22:14:13,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:13,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574759345] [2024-06-21 22:14:13,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574759345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:13,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:13,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633731125] [2024-06-21 22:14:13,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:13,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:13,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:13,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:13,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 439 transitions, 6475 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 22:14:13,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:13,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:13,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:15,187 INFO L124 PetriNetUnfolderBase]: 3296/5227 cut-off events. [2024-06-21 22:14:15,187 INFO L125 PetriNetUnfolderBase]: For 276645/276645 co-relation queries the response was YES. [2024-06-21 22:14:15,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35112 conditions, 5227 events. 3296/5227 cut-off events. For 276645/276645 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 31134 event pairs, 645 based on Foata normal form. 4/5223 useless extension candidates. Maximal degree in co-relation 34983. Up to 4212 conditions per place. [2024-06-21 22:14:15,247 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 193 changer transitions 0/475 dead transitions. [2024-06-21 22:14:15,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 475 transitions, 7938 flow [2024-06-21 22:14:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:15,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:14:15,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:14:15,249 INFO L175 Difference]: Start difference. First operand has 304 places, 439 transitions, 6475 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:14:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 475 transitions, 7938 flow [2024-06-21 22:14:15,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 475 transitions, 7658 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 22:14:15,883 INFO L231 Difference]: Finished difference. Result has 304 places, 445 transitions, 6732 flow [2024-06-21 22:14:15,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6195, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6732, PETRI_PLACES=304, PETRI_TRANSITIONS=445} [2024-06-21 22:14:15,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 22:14:15,884 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 445 transitions, 6732 flow [2024-06-21 22:14:15,884 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 22:14:15,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:15,884 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 22:14:15,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 22:14:15,885 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 22:14:15,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:15,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1893238823, now seen corresponding path program 11 times [2024-06-21 22:14:15,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:15,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458985199] [2024-06-21 22:14:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:15,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:18,976 INFO 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 22:14:18,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:18,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458985199] [2024-06-21 22:14:18,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458985199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:18,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:18,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:18,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513352233] [2024-06-21 22:14:18,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:18,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:18,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:18,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:18,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:18,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 445 transitions, 6732 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 22:14:18,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:18,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:18,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:20,915 INFO L124 PetriNetUnfolderBase]: 3300/5237 cut-off events. [2024-06-21 22:14:20,915 INFO L125 PetriNetUnfolderBase]: For 279258/279258 co-relation queries the response was YES. [2024-06-21 22:14:20,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35549 conditions, 5237 events. 3300/5237 cut-off events. For 279258/279258 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 31228 event pairs, 643 based on Foata normal form. 4/5233 useless extension candidates. Maximal degree in co-relation 35420. Up to 4217 conditions per place. [2024-06-21 22:14:20,970 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 277 selfloop transitions, 193 changer transitions 0/475 dead transitions. [2024-06-21 22:14:20,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 475 transitions, 8129 flow [2024-06-21 22:14:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:20,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 22:14:20,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 22:14:20,972 INFO L175 Difference]: Start difference. First operand has 304 places, 445 transitions, 6732 flow. Second operand 8 states and 142 transitions. [2024-06-21 22:14:20,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 475 transitions, 8129 flow [2024-06-21 22:14:21,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 475 transitions, 7483 flow, removed 96 selfloop flow, removed 6 redundant places. [2024-06-21 22:14:21,709 INFO L231 Difference]: Finished difference. Result has 306 places, 448 transitions, 6562 flow [2024-06-21 22:14:21,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6112, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6562, PETRI_PLACES=306, PETRI_TRANSITIONS=448} [2024-06-21 22:14:21,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 22:14:21,710 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 448 transitions, 6562 flow [2024-06-21 22:14:21,710 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 22:14:21,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:21,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:21,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 22:14:21,711 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 22:14:21,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash -755481025, now seen corresponding path program 12 times [2024-06-21 22:14:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:21,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720739395] [2024-06-21 22:14:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:24,691 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 22:14:24,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:24,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720739395] [2024-06-21 22:14:24,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720739395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:24,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:24,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606997946] [2024-06-21 22:14:24,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:24,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:24,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:24,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:24,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 448 transitions, 6562 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 22:14:24,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:24,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:24,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:26,598 INFO L124 PetriNetUnfolderBase]: 3310/5243 cut-off events. [2024-06-21 22:14:26,598 INFO L125 PetriNetUnfolderBase]: For 276629/276629 co-relation queries the response was YES. [2024-06-21 22:14:26,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35434 conditions, 5243 events. 3310/5243 cut-off events. For 276629/276629 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 31233 event pairs, 626 based on Foata normal form. 2/5237 useless extension candidates. Maximal degree in co-relation 35304. Up to 4227 conditions per place. [2024-06-21 22:14:26,664 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 265 selfloop transitions, 202 changer transitions 0/472 dead transitions. [2024-06-21 22:14:26,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 472 transitions, 7762 flow [2024-06-21 22:14:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:14:26,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:14:26,666 INFO L175 Difference]: Start difference. First operand has 306 places, 448 transitions, 6562 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:14:26,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 472 transitions, 7762 flow [2024-06-21 22:14:27,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 472 transitions, 7278 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 22:14:27,435 INFO L231 Difference]: Finished difference. Result has 308 places, 451 transitions, 6548 flow [2024-06-21 22:14:27,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6548, PETRI_PLACES=308, PETRI_TRANSITIONS=451} [2024-06-21 22:14:27,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 22:14:27,436 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 451 transitions, 6548 flow [2024-06-21 22:14:27,436 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 22:14:27,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:27,436 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 22:14:27,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 22:14:27,436 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 22:14:27,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:27,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1398212355, now seen corresponding path program 13 times [2024-06-21 22:14:27,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:27,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427708067] [2024-06-21 22:14:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:27,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:14:30,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:30,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427708067] [2024-06-21 22:14:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427708067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:30,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:30,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:30,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703865134] [2024-06-21 22:14:30,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:30,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:30,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 451 transitions, 6548 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 22:14:30,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:30,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:30,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:31,913 INFO L124 PetriNetUnfolderBase]: 3304/5235 cut-off events. [2024-06-21 22:14:31,914 INFO L125 PetriNetUnfolderBase]: For 275297/275297 co-relation queries the response was YES. [2024-06-21 22:14:31,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35229 conditions, 5235 events. 3304/5235 cut-off events. For 275297/275297 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31251 event pairs, 804 based on Foata normal form. 2/5229 useless extension candidates. Maximal degree in co-relation 35098. Up to 4760 conditions per place. [2024-06-21 22:14:31,983 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 111 changer transitions 0/467 dead transitions. [2024-06-21 22:14:31,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 467 transitions, 7660 flow [2024-06-21 22:14:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:14:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:14:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 22:14:31,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 22:14:31,984 INFO L175 Difference]: Start difference. First operand has 308 places, 451 transitions, 6548 flow. Second operand 9 states and 140 transitions. [2024-06-21 22:14:31,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 467 transitions, 7660 flow [2024-06-21 22:14:32,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 467 transitions, 7299 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 22:14:32,758 INFO L231 Difference]: Finished difference. Result has 312 places, 451 transitions, 6415 flow [2024-06-21 22:14:32,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6415, PETRI_PLACES=312, PETRI_TRANSITIONS=451} [2024-06-21 22:14:32,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-21 22:14:32,758 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 451 transitions, 6415 flow [2024-06-21 22:14:32,759 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 22:14:32,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:32,759 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 22:14:32,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 22:14:32,759 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 22:14:32,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:32,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1456532189, now seen corresponding path program 14 times [2024-06-21 22:14:32,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:32,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191466768] [2024-06-21 22:14:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:32,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:35,650 INFO 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 22:14:35,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:35,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191466768] [2024-06-21 22:14:35,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191466768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:35,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:35,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315181340] [2024-06-21 22:14:35,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:35,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:35,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:35,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:35,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:35,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:35,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 451 transitions, 6415 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 22:14:35,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:35,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:35,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:37,451 INFO L124 PetriNetUnfolderBase]: 3298/5227 cut-off events. [2024-06-21 22:14:37,451 INFO L125 PetriNetUnfolderBase]: For 275766/275766 co-relation queries the response was YES. [2024-06-21 22:14:37,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34644 conditions, 5227 events. 3298/5227 cut-off events. For 275766/275766 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31213 event pairs, 801 based on Foata normal form. 2/5221 useless extension candidates. Maximal degree in co-relation 34512. Up to 4755 conditions per place. [2024-06-21 22:14:37,511 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 355 selfloop transitions, 109 changer transitions 0/469 dead transitions. [2024-06-21 22:14:37,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 469 transitions, 7391 flow [2024-06-21 22:14:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:14:37,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:14:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-21 22:14:37,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-06-21 22:14:37,513 INFO L175 Difference]: Start difference. First operand has 312 places, 451 transitions, 6415 flow. Second operand 10 states and 156 transitions. [2024-06-21 22:14:37,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 469 transitions, 7391 flow [2024-06-21 22:14:38,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 469 transitions, 7059 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 22:14:38,257 INFO L231 Difference]: Finished difference. Result has 314 places, 451 transitions, 6307 flow [2024-06-21 22:14:38,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6083, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6307, PETRI_PLACES=314, PETRI_TRANSITIONS=451} [2024-06-21 22:14:38,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 22:14:38,258 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 451 transitions, 6307 flow [2024-06-21 22:14:38,258 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 22:14:38,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:38,258 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 22:14:38,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 22:14:38,259 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 22:14:38,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:38,259 INFO L85 PathProgramCache]: Analyzing trace with hash 651796399, now seen corresponding path program 4 times [2024-06-21 22:14:38,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:38,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541613764] [2024-06-21 22:14:38,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:38,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:41,265 INFO 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 22:14:41,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:41,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541613764] [2024-06-21 22:14:41,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541613764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:41,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:41,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:14:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695655422] [2024-06-21 22:14:41,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:41,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:14:41,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:41,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:14:41,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:14:41,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:41,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 451 transitions, 6307 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 22:14:41,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:41,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:41,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:43,141 INFO L124 PetriNetUnfolderBase]: 3319/5291 cut-off events. [2024-06-21 22:14:43,141 INFO L125 PetriNetUnfolderBase]: For 287104/287106 co-relation queries the response was YES. [2024-06-21 22:14:43,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34986 conditions, 5291 events. 3319/5291 cut-off events. For 287104/287106 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 31851 event pairs, 701 based on Foata normal form. 4/5294 useless extension candidates. Maximal degree in co-relation 34853. Up to 4677 conditions per place. [2024-06-21 22:14:43,203 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 399 selfloop transitions, 85 changer transitions 0/489 dead transitions. [2024-06-21 22:14:43,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 489 transitions, 7623 flow [2024-06-21 22:14:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:14:43,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:14:43,205 INFO L175 Difference]: Start difference. First operand has 314 places, 451 transitions, 6307 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:14:43,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 489 transitions, 7623 flow [2024-06-21 22:14:43,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 489 transitions, 7232 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 22:14:43,935 INFO L231 Difference]: Finished difference. Result has 311 places, 455 transitions, 6178 flow [2024-06-21 22:14:43,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5916, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6178, PETRI_PLACES=311, PETRI_TRANSITIONS=455} [2024-06-21 22:14:43,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 22:14:43,937 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 455 transitions, 6178 flow [2024-06-21 22:14:43,937 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 22:14:43,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:43,938 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 22:14:43,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 22:14:43,938 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 22:14:43,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:43,938 INFO L85 PathProgramCache]: Analyzing trace with hash -105384995, now seen corresponding path program 5 times [2024-06-21 22:14:43,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:43,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675546439] [2024-06-21 22:14:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:43,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:47,150 INFO 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 22:14:47,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:47,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675546439] [2024-06-21 22:14:47,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675546439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:47,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:47,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:14:47,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951927777] [2024-06-21 22:14:47,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:47,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:14:47,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:14:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:14:47,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:47,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 455 transitions, 6178 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 22:14:47,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:47,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:47,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:49,046 INFO L124 PetriNetUnfolderBase]: 3327/5309 cut-off events. [2024-06-21 22:14:49,047 INFO L125 PetriNetUnfolderBase]: For 291730/291732 co-relation queries the response was YES. [2024-06-21 22:14:49,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35181 conditions, 5309 events. 3327/5309 cut-off events. For 291730/291732 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32035 event pairs, 705 based on Foata normal form. 4/5312 useless extension candidates. Maximal degree in co-relation 35047. Up to 4766 conditions per place. [2024-06-21 22:14:49,103 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 404 selfloop transitions, 77 changer transitions 0/486 dead transitions. [2024-06-21 22:14:49,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 486 transitions, 7284 flow [2024-06-21 22:14:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:49,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:49,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:14:49,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:14:49,105 INFO L175 Difference]: Start difference. First operand has 311 places, 455 transitions, 6178 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:14:49,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 486 transitions, 7284 flow [2024-06-21 22:14:49,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 486 transitions, 7130 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 22:14:49,850 INFO L231 Difference]: Finished difference. Result has 314 places, 457 transitions, 6235 flow [2024-06-21 22:14:49,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6040, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6235, PETRI_PLACES=314, PETRI_TRANSITIONS=457} [2024-06-21 22:14:49,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 22:14:49,851 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 457 transitions, 6235 flow [2024-06-21 22:14:49,851 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 22:14:49,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:49,852 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 22:14:49,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 22:14:49,852 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 22:14:49,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:49,852 INFO L85 PathProgramCache]: Analyzing trace with hash 540808435, now seen corresponding path program 6 times [2024-06-21 22:14:49,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:49,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658750888] [2024-06-21 22:14:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:53,317 INFO 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 22:14:53,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:53,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658750888] [2024-06-21 22:14:53,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658750888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:53,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:53,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:14:53,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009521999] [2024-06-21 22:14:53,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:53,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:14:53,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:53,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:14:53,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:14:53,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:53,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 457 transitions, 6235 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 22:14:53,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:53,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:55,099 INFO L124 PetriNetUnfolderBase]: 3445/5453 cut-off events. [2024-06-21 22:14:55,099 INFO L125 PetriNetUnfolderBase]: For 321556/321556 co-relation queries the response was YES. [2024-06-21 22:14:55,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36568 conditions, 5453 events. 3445/5453 cut-off events. For 321556/321556 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 32773 event pairs, 824 based on Foata normal form. 12/5460 useless extension candidates. Maximal degree in co-relation 36433. Up to 4946 conditions per place. [2024-06-21 22:14:55,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 90 changer transitions 0/497 dead transitions. [2024-06-21 22:14:55,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 497 transitions, 7643 flow [2024-06-21 22:14:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:14:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:14:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 22:14:55,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 22:14:55,169 INFO L175 Difference]: Start difference. First operand has 314 places, 457 transitions, 6235 flow. Second operand 9 states and 148 transitions. [2024-06-21 22:14:55,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 497 transitions, 7643 flow [2024-06-21 22:14:56,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 497 transitions, 7465 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 22:14:56,039 INFO L231 Difference]: Finished difference. Result has 317 places, 472 transitions, 6577 flow [2024-06-21 22:14:56,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6067, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6577, PETRI_PLACES=317, PETRI_TRANSITIONS=472} [2024-06-21 22:14:56,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 22:14:56,040 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 472 transitions, 6577 flow [2024-06-21 22:14:56,040 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 22:14:56,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:56,040 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 22:14:56,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 22:14:56,040 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 22:14:56,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:56,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1981517043, now seen corresponding path program 7 times [2024-06-21 22:14:56,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:56,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818822764] [2024-06-21 22:14:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:56,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:58,880 INFO 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 22:14:58,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:58,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818822764] [2024-06-21 22:14:58,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818822764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:58,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:58,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:14:58,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112588756] [2024-06-21 22:14:58,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:58,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:14:58,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:14:58,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:14:58,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:58,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 472 transitions, 6577 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 22:14:58,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:58,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:58,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:00,549 INFO L124 PetriNetUnfolderBase]: 3466/5502 cut-off events. [2024-06-21 22:15:00,550 INFO L125 PetriNetUnfolderBase]: For 302001/302001 co-relation queries the response was YES. [2024-06-21 22:15:00,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37168 conditions, 5502 events. 3466/5502 cut-off events. For 302001/302001 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 33198 event pairs, 723 based on Foata normal form. 2/5500 useless extension candidates. Maximal degree in co-relation 37032. Up to 4936 conditions per place. [2024-06-21 22:15:00,619 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 79 changer transitions 0/505 dead transitions. [2024-06-21 22:15:00,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 505 transitions, 7919 flow [2024-06-21 22:15:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:15:00,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:15:00,621 INFO L175 Difference]: Start difference. First operand has 317 places, 472 transitions, 6577 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:15:00,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 505 transitions, 7919 flow [2024-06-21 22:15:01,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 505 transitions, 7751 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:15:01,461 INFO L231 Difference]: Finished difference. Result has 319 places, 476 transitions, 6668 flow [2024-06-21 22:15:01,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6409, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6668, PETRI_PLACES=319, PETRI_TRANSITIONS=476} [2024-06-21 22:15:01,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-21 22:15:01,462 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 476 transitions, 6668 flow [2024-06-21 22:15:01,462 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 22:15:01,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:01,463 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 22:15:01,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 22:15:01,463 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 22:15:01,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:01,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1343158711, now seen corresponding path program 8 times [2024-06-21 22:15:01,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:01,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183993152] [2024-06-21 22:15:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:01,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:15:04,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:04,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183993152] [2024-06-21 22:15:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183993152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:04,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122712252] [2024-06-21 22:15:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:04,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:04,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:04,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:04,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 476 transitions, 6668 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 22:15:04,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:04,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:04,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:06,583 INFO L124 PetriNetUnfolderBase]: 3474/5520 cut-off events. [2024-06-21 22:15:06,584 INFO L125 PetriNetUnfolderBase]: For 310392/310392 co-relation queries the response was YES. [2024-06-21 22:15:06,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37503 conditions, 5520 events. 3474/5520 cut-off events. For 310392/310392 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33298 event pairs, 729 based on Foata normal form. 2/5518 useless extension candidates. Maximal degree in co-relation 37366. Up to 4989 conditions per place. [2024-06-21 22:15:06,654 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 421 selfloop transitions, 76 changer transitions 0/502 dead transitions. [2024-06-21 22:15:06,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 502 transitions, 7792 flow [2024-06-21 22:15:06,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:15:06,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:15:06,656 INFO L175 Difference]: Start difference. First operand has 319 places, 476 transitions, 6668 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:15:06,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 502 transitions, 7792 flow [2024-06-21 22:15:07,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 502 transitions, 7616 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 22:15:07,565 INFO L231 Difference]: Finished difference. Result has 323 places, 478 transitions, 6704 flow [2024-06-21 22:15:07,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6704, PETRI_PLACES=323, PETRI_TRANSITIONS=478} [2024-06-21 22:15:07,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-21 22:15:07,566 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 478 transitions, 6704 flow [2024-06-21 22:15:07,566 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 22:15:07,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:07,566 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 22:15:07,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 22:15:07,567 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 22:15:07,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:07,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1628198131, now seen corresponding path program 9 times [2024-06-21 22:15:07,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:07,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059988515] [2024-06-21 22:15:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:07,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:10,722 INFO 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 22:15:10,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:10,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059988515] [2024-06-21 22:15:10,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059988515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:10,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:10,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:10,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229261356] [2024-06-21 22:15:10,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:10,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:10,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:10,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:10,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:10,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 478 transitions, 6704 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 22:15:10,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:10,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:10,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:12,517 INFO L124 PetriNetUnfolderBase]: 3482/5536 cut-off events. [2024-06-21 22:15:12,517 INFO L125 PetriNetUnfolderBase]: For 316861/316861 co-relation queries the response was YES. [2024-06-21 22:15:12,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37791 conditions, 5536 events. 3482/5536 cut-off events. For 316861/316861 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33473 event pairs, 652 based on Foata normal form. 2/5534 useless extension candidates. Maximal degree in co-relation 37652. Up to 4754 conditions per place. [2024-06-21 22:15:12,705 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 405 selfloop transitions, 106 changer transitions 0/516 dead transitions. [2024-06-21 22:15:12,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 516 transitions, 8292 flow [2024-06-21 22:15:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:15:12,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 22:15:12,708 INFO L175 Difference]: Start difference. First operand has 323 places, 478 transitions, 6704 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:15:12,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 516 transitions, 8292 flow [2024-06-21 22:15:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 516 transitions, 8126 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:15:13,473 INFO L231 Difference]: Finished difference. Result has 326 places, 486 transitions, 6970 flow [2024-06-21 22:15:13,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6970, PETRI_PLACES=326, PETRI_TRANSITIONS=486} [2024-06-21 22:15:13,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 22:15:13,473 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 486 transitions, 6970 flow [2024-06-21 22:15:13,474 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 22:15:13,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:13,474 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 22:15:13,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 22:15:13,474 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 22:15:13,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1639625971, now seen corresponding path program 10 times [2024-06-21 22:15:13,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:13,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135995502] [2024-06-21 22:15:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:16,748 INFO 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 22:15:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:16,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135995502] [2024-06-21 22:15:16,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135995502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:16,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:16,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:16,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096612410] [2024-06-21 22:15:16,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:16,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:16,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:16,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 486 transitions, 6970 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:16,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:16,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:16,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:18,618 INFO L124 PetriNetUnfolderBase]: 3490/5552 cut-off events. [2024-06-21 22:15:18,618 INFO L125 PetriNetUnfolderBase]: For 325922/325922 co-relation queries the response was YES. [2024-06-21 22:15:18,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38463 conditions, 5552 events. 3490/5552 cut-off events. For 325922/325922 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33605 event pairs, 653 based on Foata normal form. 2/5550 useless extension candidates. Maximal degree in co-relation 38322. Up to 4762 conditions per place. [2024-06-21 22:15:18,687 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 399 selfloop transitions, 110 changer transitions 0/514 dead transitions. [2024-06-21 22:15:18,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 514 transitions, 8309 flow [2024-06-21 22:15:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 22:15:18,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:15:18,689 INFO L175 Difference]: Start difference. First operand has 326 places, 486 transitions, 6970 flow. Second operand 8 states and 136 transitions. [2024-06-21 22:15:18,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 514 transitions, 8309 flow [2024-06-21 22:15:19,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 514 transitions, 8099 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-21 22:15:19,518 INFO L231 Difference]: Finished difference. Result has 331 places, 489 transitions, 7068 flow [2024-06-21 22:15:19,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6796, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7068, PETRI_PLACES=331, PETRI_TRANSITIONS=489} [2024-06-21 22:15:19,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 22:15:19,519 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 489 transitions, 7068 flow [2024-06-21 22:15:19,519 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 22:15:19,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:19,519 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 22:15:19,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 22:15:19,519 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 22:15:19,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1993469915, now seen corresponding path program 11 times [2024-06-21 22:15:19,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:19,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602411707] [2024-06-21 22:15:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:19,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:15:22,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:22,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602411707] [2024-06-21 22:15:22,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602411707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:22,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:22,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:22,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149724103] [2024-06-21 22:15:22,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:22,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:22,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:22,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:22,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:22,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:22,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 489 transitions, 7068 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 22:15:22,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:22,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:22,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:24,743 INFO L124 PetriNetUnfolderBase]: 3498/5564 cut-off events. [2024-06-21 22:15:24,743 INFO L125 PetriNetUnfolderBase]: For 331126/331126 co-relation queries the response was YES. [2024-06-21 22:15:24,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38733 conditions, 5564 events. 3498/5564 cut-off events. For 331126/331126 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33718 event pairs, 733 based on Foata normal form. 2/5562 useless extension candidates. Maximal degree in co-relation 38590. Up to 5027 conditions per place. [2024-06-21 22:15:24,816 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 429 selfloop transitions, 77 changer transitions 0/511 dead transitions. [2024-06-21 22:15:24,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 511 transitions, 8182 flow [2024-06-21 22:15:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 22:15:24,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 22:15:24,817 INFO L175 Difference]: Start difference. First operand has 331 places, 489 transitions, 7068 flow. Second operand 8 states and 131 transitions. [2024-06-21 22:15:24,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 511 transitions, 8182 flow [2024-06-21 22:15:25,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 511 transitions, 7995 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 22:15:25,546 INFO L231 Difference]: Finished difference. Result has 335 places, 491 transitions, 7084 flow [2024-06-21 22:15:25,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6883, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7084, PETRI_PLACES=335, PETRI_TRANSITIONS=491} [2024-06-21 22:15:25,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 22:15:25,547 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 491 transitions, 7084 flow [2024-06-21 22:15:25,547 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 22:15:25,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:25,547 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 22:15:25,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 22:15:25,547 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 22:15:25,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1697718421, now seen corresponding path program 12 times [2024-06-21 22:15:25,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:25,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432719691] [2024-06-21 22:15:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:25,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:29,030 INFO 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 22:15:29,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:29,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432719691] [2024-06-21 22:15:29,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432719691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:29,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:29,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:29,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106372430] [2024-06-21 22:15:29,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:29,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:29,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:29,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 491 transitions, 7084 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 22:15:29,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:29,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:29,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:30,566 INFO L124 PetriNetUnfolderBase]: 3506/5580 cut-off events. [2024-06-21 22:15:30,567 INFO L125 PetriNetUnfolderBase]: For 337711/337711 co-relation queries the response was YES. [2024-06-21 22:15:30,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38756 conditions, 5580 events. 3506/5580 cut-off events. For 337711/337711 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33886 event pairs, 733 based on Foata normal form. 2/5578 useless extension candidates. Maximal degree in co-relation 38612. Up to 5003 conditions per place. [2024-06-21 22:15:30,640 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 423 selfloop transitions, 86 changer transitions 0/514 dead transitions. [2024-06-21 22:15:30,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 514 transitions, 8214 flow [2024-06-21 22:15:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 22:15:30,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 22:15:30,642 INFO L175 Difference]: Start difference. First operand has 335 places, 491 transitions, 7084 flow. Second operand 8 states and 131 transitions. [2024-06-21 22:15:30,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 514 transitions, 8214 flow [2024-06-21 22:15:31,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 514 transitions, 8041 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 22:15:31,481 INFO L231 Difference]: Finished difference. Result has 338 places, 494 transitions, 7161 flow [2024-06-21 22:15:31,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6911, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7161, PETRI_PLACES=338, PETRI_TRANSITIONS=494} [2024-06-21 22:15:31,482 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 22:15:31,482 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 494 transitions, 7161 flow [2024-06-21 22:15:31,482 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 22:15:31,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:31,482 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 22:15:31,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 22:15:31,483 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 22:15:31,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:31,483 INFO L85 PathProgramCache]: Analyzing trace with hash -188174523, now seen corresponding path program 13 times [2024-06-21 22:15:31,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:31,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776249414] [2024-06-21 22:15:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:31,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:34,916 INFO 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 22:15:34,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:34,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776249414] [2024-06-21 22:15:34,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776249414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:34,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:34,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:34,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468422857] [2024-06-21 22:15:34,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:34,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:34,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:34,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:34,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:34,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:34,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 494 transitions, 7161 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 22:15:34,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:34,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:34,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:36,576 INFO L124 PetriNetUnfolderBase]: 3501/5536 cut-off events. [2024-06-21 22:15:36,576 INFO L125 PetriNetUnfolderBase]: For 338639/338639 co-relation queries the response was YES. [2024-06-21 22:15:36,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38653 conditions, 5536 events. 3501/5536 cut-off events. For 338639/338639 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33417 event pairs, 820 based on Foata normal form. 2/5530 useless extension candidates. Maximal degree in co-relation 38507. Up to 5074 conditions per place. [2024-06-21 22:15:36,650 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 391 selfloop transitions, 113 changer transitions 0/509 dead transitions. [2024-06-21 22:15:36,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 509 transitions, 8211 flow [2024-06-21 22:15:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:15:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:15:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-21 22:15:36,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-21 22:15:36,652 INFO L175 Difference]: Start difference. First operand has 338 places, 494 transitions, 7161 flow. Second operand 9 states and 138 transitions. [2024-06-21 22:15:36,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 509 transitions, 8211 flow [2024-06-21 22:15:37,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 509 transitions, 8011 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 22:15:37,611 INFO L231 Difference]: Finished difference. Result has 342 places, 494 transitions, 7192 flow [2024-06-21 22:15:37,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6961, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7192, PETRI_PLACES=342, PETRI_TRANSITIONS=494} [2024-06-21 22:15:37,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 22:15:37,612 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 494 transitions, 7192 flow [2024-06-21 22:15:37,612 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 22:15:37,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:37,613 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 22:15:37,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 22:15:37,613 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 22:15:37,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:37,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1039863711, now seen corresponding path program 14 times [2024-06-21 22:15:37,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:37,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837257496] [2024-06-21 22:15:37,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:37,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:15:41,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:41,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837257496] [2024-06-21 22:15:41,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837257496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:41,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:41,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:41,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670985050] [2024-06-21 22:15:41,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:41,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:41,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:41,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:41,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:41,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 494 transitions, 7192 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 22:15:41,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:41,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:41,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:42,791 INFO L124 PetriNetUnfolderBase]: 3555/5616 cut-off events. [2024-06-21 22:15:42,791 INFO L125 PetriNetUnfolderBase]: For 373720/373720 co-relation queries the response was YES. [2024-06-21 22:15:42,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39935 conditions, 5616 events. 3555/5616 cut-off events. For 373720/373720 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33822 event pairs, 824 based on Foata normal form. 2/5610 useless extension candidates. Maximal degree in co-relation 39788. Up to 4906 conditions per place. [2024-06-21 22:15:42,864 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 382 selfloop transitions, 128 changer transitions 0/515 dead transitions. [2024-06-21 22:15:42,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 515 transitions, 8498 flow [2024-06-21 22:15:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:15:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:15:42,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 22:15:42,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-06-21 22:15:42,866 INFO L175 Difference]: Start difference. First operand has 342 places, 494 transitions, 7192 flow. Second operand 9 states and 143 transitions. [2024-06-21 22:15:42,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 515 transitions, 8498 flow [2024-06-21 22:15:43,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 515 transitions, 8235 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 22:15:43,994 INFO L231 Difference]: Finished difference. Result has 344 places, 495 transitions, 7254 flow [2024-06-21 22:15:43,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7254, PETRI_PLACES=344, PETRI_TRANSITIONS=495} [2024-06-21 22:15:43,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 22:15:43,995 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 495 transitions, 7254 flow [2024-06-21 22:15:43,996 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 22:15:43,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:43,996 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 22:15:43,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 22:15:43,996 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 22:15:43,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1129034329, now seen corresponding path program 15 times [2024-06-21 22:15:43,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:43,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236355950] [2024-06-21 22:15:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:15:47,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236355950] [2024-06-21 22:15:47,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236355950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:47,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:47,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132278499] [2024-06-21 22:15:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:47,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:47,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 495 transitions, 7254 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 22:15:47,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:47,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:47,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:49,254 INFO L124 PetriNetUnfolderBase]: 3527/5578 cut-off events. [2024-06-21 22:15:49,254 INFO L125 PetriNetUnfolderBase]: For 375698/375698 co-relation queries the response was YES. [2024-06-21 22:15:49,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38975 conditions, 5578 events. 3527/5578 cut-off events. For 375698/375698 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 33621 event pairs, 822 based on Foata normal form. 12/5582 useless extension candidates. Maximal degree in co-relation 38826. Up to 5074 conditions per place. [2024-06-21 22:15:49,327 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 112 changer transitions 0/517 dead transitions. [2024-06-21 22:15:49,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 517 transitions, 8378 flow [2024-06-21 22:15:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:15:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:15:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-21 22:15:49,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-21 22:15:49,329 INFO L175 Difference]: Start difference. First operand has 344 places, 495 transitions, 7254 flow. Second operand 10 states and 158 transitions. [2024-06-21 22:15:49,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 517 transitions, 8378 flow [2024-06-21 22:15:50,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 517 transitions, 8088 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 22:15:50,436 INFO L231 Difference]: Finished difference. Result has 346 places, 495 transitions, 7196 flow [2024-06-21 22:15:50,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7196, PETRI_PLACES=346, PETRI_TRANSITIONS=495} [2024-06-21 22:15:50,436 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 22:15:50,436 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 495 transitions, 7196 flow [2024-06-21 22:15:50,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:50,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:50,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:50,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 22:15:50,437 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 22:15:50,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1973482346, now seen corresponding path program 1 times [2024-06-21 22:15:50,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:50,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979843555] [2024-06-21 22:15:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:50,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:53,403 INFO 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 22:15:53,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:53,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979843555] [2024-06-21 22:15:53,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979843555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:53,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:53,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220678800] [2024-06-21 22:15:53,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:53,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:53,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:53,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:53,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 495 transitions, 7196 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 22:15:53,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:53,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:53,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:55,630 INFO L124 PetriNetUnfolderBase]: 3647/5789 cut-off events. [2024-06-21 22:15:55,630 INFO L125 PetriNetUnfolderBase]: For 400187/400187 co-relation queries the response was YES. [2024-06-21 22:15:55,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40705 conditions, 5789 events. 3647/5789 cut-off events. For 400187/400187 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35359 event pairs, 803 based on Foata normal form. 8/5796 useless extension candidates. Maximal degree in co-relation 40556. Up to 5058 conditions per place. [2024-06-21 22:15:55,708 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 450 selfloop transitions, 98 changer transitions 0/553 dead transitions. [2024-06-21 22:15:55,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 553 transitions, 8754 flow [2024-06-21 22:15:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:15:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:15:55,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 22:15:55,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 22:15:55,710 INFO L175 Difference]: Start difference. First operand has 346 places, 495 transitions, 7196 flow. Second operand 10 states and 191 transitions. [2024-06-21 22:15:55,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 553 transitions, 8754 flow [2024-06-21 22:15:56,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 553 transitions, 8520 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 22:15:56,729 INFO L231 Difference]: Finished difference. Result has 350 places, 502 transitions, 7331 flow [2024-06-21 22:15:56,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6962, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7331, PETRI_PLACES=350, PETRI_TRANSITIONS=502} [2024-06-21 22:15:56,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-21 22:15:56,730 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 502 transitions, 7331 flow [2024-06-21 22:15:56,730 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 22:15:56,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:56,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:56,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 22:15:56,730 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 22:15:56,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1753006930, now seen corresponding path program 2 times [2024-06-21 22:15:56,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:56,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018697053] [2024-06-21 22:15:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:15:59,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:59,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018697053] [2024-06-21 22:15:59,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018697053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:59,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:59,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:15:59,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069652577] [2024-06-21 22:15:59,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:59,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:15:59,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:15:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:15:59,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:59,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 502 transitions, 7331 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 22:15:59,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:59,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:59,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:01,922 INFO L124 PetriNetUnfolderBase]: 3721/5909 cut-off events. [2024-06-21 22:16:01,923 INFO L125 PetriNetUnfolderBase]: For 411020/411020 co-relation queries the response was YES. [2024-06-21 22:16:01,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41786 conditions, 5909 events. 3721/5909 cut-off events. For 411020/411020 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36145 event pairs, 833 based on Foata normal form. 8/5916 useless extension candidates. Maximal degree in co-relation 41634. Up to 5320 conditions per place. [2024-06-21 22:16:02,002 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 455 selfloop transitions, 92 changer transitions 0/552 dead transitions. [2024-06-21 22:16:02,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 552 transitions, 8679 flow [2024-06-21 22:16:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:16:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:16:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 22:16:02,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 22:16:02,005 INFO L175 Difference]: Start difference. First operand has 350 places, 502 transitions, 7331 flow. Second operand 10 states and 185 transitions. [2024-06-21 22:16:02,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 552 transitions, 8679 flow [2024-06-21 22:16:03,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 552 transitions, 8594 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 22:16:03,241 INFO L231 Difference]: Finished difference. Result has 357 places, 507 transitions, 7541 flow [2024-06-21 22:16:03,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7541, PETRI_PLACES=357, PETRI_TRANSITIONS=507} [2024-06-21 22:16:03,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 22:16:03,241 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 507 transitions, 7541 flow [2024-06-21 22:16:03,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:03,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:03,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:03,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 22:16:03,242 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 22:16:03,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1359874190, now seen corresponding path program 1 times [2024-06-21 22:16:03,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:03,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292823043] [2024-06-21 22:16:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:03,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:06,223 INFO 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 22:16:06,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292823043] [2024-06-21 22:16:06,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292823043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:06,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:06,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:06,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270477163] [2024-06-21 22:16:06,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:06,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:06,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:06,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:06,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 507 transitions, 7541 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 22:16:06,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:06,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:06,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:08,359 INFO L124 PetriNetUnfolderBase]: 3781/5991 cut-off events. [2024-06-21 22:16:08,360 INFO L125 PetriNetUnfolderBase]: For 406539/406539 co-relation queries the response was YES. [2024-06-21 22:16:08,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42557 conditions, 5991 events. 3781/5991 cut-off events. For 406539/406539 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 36654 event pairs, 815 based on Foata normal form. 4/5994 useless extension candidates. Maximal degree in co-relation 42402. Up to 5332 conditions per place. [2024-06-21 22:16:08,445 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 439 selfloop transitions, 115 changer transitions 0/559 dead transitions. [2024-06-21 22:16:08,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 559 transitions, 8885 flow [2024-06-21 22:16:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:16:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:16:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 22:16:08,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 22:16:08,447 INFO L175 Difference]: Start difference. First operand has 357 places, 507 transitions, 7541 flow. Second operand 10 states and 188 transitions. [2024-06-21 22:16:08,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 559 transitions, 8885 flow [2024-06-21 22:16:09,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 559 transitions, 8700 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 22:16:09,952 INFO L231 Difference]: Finished difference. Result has 362 places, 516 transitions, 7758 flow [2024-06-21 22:16:09,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7356, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7758, PETRI_PLACES=362, PETRI_TRANSITIONS=516} [2024-06-21 22:16:09,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-21 22:16:09,960 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 516 transitions, 7758 flow [2024-06-21 22:16:09,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:09,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:09,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:09,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 22:16:09,961 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 22:16:09,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash -607333586, now seen corresponding path program 3 times [2024-06-21 22:16:09,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:09,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317286322] [2024-06-21 22:16:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:09,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:13,247 INFO 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 22:16:13,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:13,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317286322] [2024-06-21 22:16:13,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317286322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:13,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:13,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:13,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166343334] [2024-06-21 22:16:13,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:13,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:13,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:13,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:13,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 516 transitions, 7758 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 22:16:13,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:13,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:15,355 INFO L124 PetriNetUnfolderBase]: 3763/5954 cut-off events. [2024-06-21 22:16:15,355 INFO L125 PetriNetUnfolderBase]: For 400311/400311 co-relation queries the response was YES. [2024-06-21 22:16:15,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42264 conditions, 5954 events. 3763/5954 cut-off events. For 400311/400311 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 36378 event pairs, 817 based on Foata normal form. 8/5961 useless extension candidates. Maximal degree in co-relation 42107. Up to 5388 conditions per place. [2024-06-21 22:16:15,433 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 457 selfloop transitions, 93 changer transitions 0/555 dead transitions. [2024-06-21 22:16:15,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 555 transitions, 9010 flow [2024-06-21 22:16:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:16:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:16:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 22:16:15,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 22:16:15,435 INFO L175 Difference]: Start difference. First operand has 362 places, 516 transitions, 7758 flow. Second operand 10 states and 176 transitions. [2024-06-21 22:16:15,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 555 transitions, 9010 flow [2024-06-21 22:16:17,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 555 transitions, 8744 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 22:16:17,008 INFO L231 Difference]: Finished difference. Result has 365 places, 516 transitions, 7682 flow [2024-06-21 22:16:17,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7682, PETRI_PLACES=365, PETRI_TRANSITIONS=516} [2024-06-21 22:16:17,009 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 22:16:17,009 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 516 transitions, 7682 flow [2024-06-21 22:16:17,009 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 22:16:17,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:17,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:17,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 22:16:17,010 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 22:16:17,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1050238140, now seen corresponding path program 2 times [2024-06-21 22:16:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699271630] [2024-06-21 22:16:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:19,974 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 22:16:19,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:19,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699271630] [2024-06-21 22:16:19,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699271630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:19,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:19,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:19,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767691941] [2024-06-21 22:16:19,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:19,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:19,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:20,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:20,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 516 transitions, 7682 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 22:16:20,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:20,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:20,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:22,329 INFO L124 PetriNetUnfolderBase]: 3939/6222 cut-off events. [2024-06-21 22:16:22,329 INFO L125 PetriNetUnfolderBase]: For 442612/442614 co-relation queries the response was YES. [2024-06-21 22:16:22,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44641 conditions, 6222 events. 3939/6222 cut-off events. For 442612/442614 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38077 event pairs, 732 based on Foata normal form. 6/6227 useless extension candidates. Maximal degree in co-relation 44483. Up to 4226 conditions per place. [2024-06-21 22:16:22,418 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 327 selfloop transitions, 264 changer transitions 0/596 dead transitions. [2024-06-21 22:16:22,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 596 transitions, 10148 flow [2024-06-21 22:16:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:16:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:16:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 22:16:22,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 22:16:22,420 INFO L175 Difference]: Start difference. First operand has 365 places, 516 transitions, 7682 flow. Second operand 10 states and 198 transitions. [2024-06-21 22:16:22,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 596 transitions, 10148 flow [2024-06-21 22:16:23,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 596 transitions, 9939 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 22:16:23,872 INFO L231 Difference]: Finished difference. Result has 368 places, 538 transitions, 8465 flow [2024-06-21 22:16:23,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7473, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8465, PETRI_PLACES=368, PETRI_TRANSITIONS=538} [2024-06-21 22:16:23,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 22:16:23,873 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 538 transitions, 8465 flow [2024-06-21 22:16:23,873 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 22:16:23,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:23,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:23,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 22:16:23,874 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 22:16:23,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1861699244, now seen corresponding path program 3 times [2024-06-21 22:16:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:23,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681092208] [2024-06-21 22:16:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:23,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:26,709 INFO 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 22:16:26,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:26,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681092208] [2024-06-21 22:16:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681092208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:26,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:26,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:26,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756253752] [2024-06-21 22:16:26,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:26,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:26,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:26,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:26,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:26,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:26,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 538 transitions, 8465 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 22:16:26,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:26,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:26,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:28,991 INFO L124 PetriNetUnfolderBase]: 3991/6294 cut-off events. [2024-06-21 22:16:28,992 INFO L125 PetriNetUnfolderBase]: For 474677/474679 co-relation queries the response was YES. [2024-06-21 22:16:29,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47032 conditions, 6294 events. 3991/6294 cut-off events. For 474677/474679 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38497 event pairs, 722 based on Foata normal form. 6/6299 useless extension candidates. Maximal degree in co-relation 46873. Up to 4266 conditions per place. [2024-06-21 22:16:29,080 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 319 selfloop transitions, 274 changer transitions 0/598 dead transitions. [2024-06-21 22:16:29,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 598 transitions, 10702 flow [2024-06-21 22:16:29,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:16:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:16:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 22:16:29,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 22:16:29,082 INFO L175 Difference]: Start difference. First operand has 368 places, 538 transitions, 8465 flow. Second operand 10 states and 194 transitions. [2024-06-21 22:16:29,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 598 transitions, 10702 flow [2024-06-21 22:16:30,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 598 transitions, 10519 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-21 22:16:30,899 INFO L231 Difference]: Finished difference. Result has 375 places, 544 transitions, 8980 flow [2024-06-21 22:16:30,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8330, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8980, PETRI_PLACES=375, PETRI_TRANSITIONS=544} [2024-06-21 22:16:30,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 22:16:30,900 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 544 transitions, 8980 flow [2024-06-21 22:16:30,900 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 22:16:30,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:30,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 22:16:30,901 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 22:16:30,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:30,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2026893626, now seen corresponding path program 4 times [2024-06-21 22:16:30,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:30,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482499070] [2024-06-21 22:16:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:30,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:16:33,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:33,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482499070] [2024-06-21 22:16:33,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482499070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:33,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:33,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:33,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181685984] [2024-06-21 22:16:33,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:33,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:33,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:33,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:33,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:33,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:33,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 544 transitions, 8980 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 22:16:33,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:33,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:33,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:36,346 INFO L124 PetriNetUnfolderBase]: 3979/6278 cut-off events. [2024-06-21 22:16:36,346 INFO L125 PetriNetUnfolderBase]: For 467308/467310 co-relation queries the response was YES. [2024-06-21 22:16:36,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47024 conditions, 6278 events. 3979/6278 cut-off events. For 467308/467310 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 38430 event pairs, 720 based on Foata normal form. 6/6283 useless extension candidates. Maximal degree in co-relation 46863. Up to 4258 conditions per place. [2024-06-21 22:16:36,430 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 325 selfloop transitions, 269 changer transitions 0/599 dead transitions. [2024-06-21 22:16:36,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 599 transitions, 11085 flow [2024-06-21 22:16:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:16:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:16:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 22:16:36,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 22:16:36,432 INFO L175 Difference]: Start difference. First operand has 375 places, 544 transitions, 8980 flow. Second operand 10 states and 196 transitions. [2024-06-21 22:16:36,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 599 transitions, 11085 flow [2024-06-21 22:16:38,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 599 transitions, 10570 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 22:16:38,531 INFO L231 Difference]: Finished difference. Result has 379 places, 544 transitions, 9009 flow [2024-06-21 22:16:38,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8465, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9009, PETRI_PLACES=379, PETRI_TRANSITIONS=544} [2024-06-21 22:16:38,531 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 22:16:38,532 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 544 transitions, 9009 flow [2024-06-21 22:16:38,532 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 22:16:38,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:38,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:38,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 22:16:38,532 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 22:16:38,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash -259973750, now seen corresponding path program 5 times [2024-06-21 22:16:38,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:38,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988345017] [2024-06-21 22:16:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:38,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:41,475 INFO 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 22:16:41,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:41,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988345017] [2024-06-21 22:16:41,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988345017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:41,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:41,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:41,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913309752] [2024-06-21 22:16:41,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:41,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:41,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:41,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:41,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 544 transitions, 9009 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 22:16:41,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:41,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:41,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:43,775 INFO L124 PetriNetUnfolderBase]: 3999/6298 cut-off events. [2024-06-21 22:16:43,775 INFO L125 PetriNetUnfolderBase]: For 476592/476592 co-relation queries the response was YES. [2024-06-21 22:16:43,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47203 conditions, 6298 events. 3999/6298 cut-off events. For 476592/476592 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38527 event pairs, 865 based on Foata normal form. 4/6301 useless extension candidates. Maximal degree in co-relation 47041. Up to 5572 conditions per place. [2024-06-21 22:16:43,860 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 440 selfloop transitions, 141 changer transitions 0/586 dead transitions. [2024-06-21 22:16:43,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 586 transitions, 10516 flow [2024-06-21 22:16:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:16:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:16:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-21 22:16:43,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 22:16:43,862 INFO L175 Difference]: Start difference. First operand has 379 places, 544 transitions, 9009 flow. Second operand 12 states and 203 transitions. [2024-06-21 22:16:43,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 586 transitions, 10516 flow [2024-06-21 22:16:45,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 586 transitions, 9977 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 22:16:45,277 INFO L231 Difference]: Finished difference. Result has 384 places, 547 transitions, 8815 flow [2024-06-21 22:16:45,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8815, PETRI_PLACES=384, PETRI_TRANSITIONS=547} [2024-06-21 22:16:45,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-21 22:16:45,277 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 547 transitions, 8815 flow [2024-06-21 22:16:45,277 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 22:16:45,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:45,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:45,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 22:16:45,278 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 22:16:45,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:45,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1853096520, now seen corresponding path program 6 times [2024-06-21 22:16:45,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:45,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359823056] [2024-06-21 22:16:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:45,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:49,197 INFO 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 22:16:49,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:49,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359823056] [2024-06-21 22:16:49,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359823056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:49,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:49,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:49,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247500588] [2024-06-21 22:16:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:49,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:49,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:49,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:49,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:49,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:49,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 547 transitions, 8815 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 22:16:49,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:49,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:49,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:51,544 INFO L124 PetriNetUnfolderBase]: 4019/6336 cut-off events. [2024-06-21 22:16:51,544 INFO L125 PetriNetUnfolderBase]: For 482216/482216 co-relation queries the response was YES. [2024-06-21 22:16:51,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46778 conditions, 6336 events. 4019/6336 cut-off events. For 482216/482216 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 38863 event pairs, 877 based on Foata normal form. 4/6339 useless extension candidates. Maximal degree in co-relation 46615. Up to 5588 conditions per place. [2024-06-21 22:16:51,621 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 450 selfloop transitions, 131 changer transitions 0/586 dead transitions. [2024-06-21 22:16:51,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 586 transitions, 10318 flow [2024-06-21 22:16:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:16:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:16:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 22:16:51,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 22:16:51,623 INFO L175 Difference]: Start difference. First operand has 384 places, 547 transitions, 8815 flow. Second operand 10 states and 178 transitions. [2024-06-21 22:16:51,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 586 transitions, 10318 flow [2024-06-21 22:16:53,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 586 transitions, 9949 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 22:16:53,596 INFO L231 Difference]: Finished difference. Result has 385 places, 550 transitions, 8771 flow [2024-06-21 22:16:53,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8460, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8771, PETRI_PLACES=385, PETRI_TRANSITIONS=550} [2024-06-21 22:16:53,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-21 22:16:53,597 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 550 transitions, 8771 flow [2024-06-21 22:16:53,597 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 22:16:53,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:53,608 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, 1, 1] [2024-06-21 22:16:53,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 22:16:53,608 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 22:16:53,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:53,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1853452710, now seen corresponding path program 7 times [2024-06-21 22:16:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902806935] [2024-06-21 22:16:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:53,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:16:56,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:56,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902806935] [2024-06-21 22:16:56,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902806935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:56,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:56,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:56,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368049165] [2024-06-21 22:16:56,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:56,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:56,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:56,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:56,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:56,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 550 transitions, 8771 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 22:16:56,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:56,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:56,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:58,822 INFO L124 PetriNetUnfolderBase]: 4007/6318 cut-off events. [2024-06-21 22:16:58,822 INFO L125 PetriNetUnfolderBase]: For 471797/471797 co-relation queries the response was YES. [2024-06-21 22:16:58,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46223 conditions, 6318 events. 4007/6318 cut-off events. For 471797/471797 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 38702 event pairs, 871 based on Foata normal form. 4/6321 useless extension candidates. Maximal degree in co-relation 46059. Up to 5580 conditions per place. [2024-06-21 22:16:58,899 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 445 selfloop transitions, 135 changer transitions 0/585 dead transitions. [2024-06-21 22:16:58,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 585 transitions, 10029 flow [2024-06-21 22:16:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:16:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:16:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 22:16:58,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 22:16:58,916 INFO L175 Difference]: Start difference. First operand has 385 places, 550 transitions, 8771 flow. Second operand 10 states and 177 transitions. [2024-06-21 22:16:58,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 585 transitions, 10029 flow [2024-06-21 22:17:00,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 585 transitions, 9699 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 22:17:00,576 INFO L231 Difference]: Finished difference. Result has 387 places, 550 transitions, 8717 flow [2024-06-21 22:17:00,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8441, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8717, PETRI_PLACES=387, PETRI_TRANSITIONS=550} [2024-06-21 22:17:00,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 22:17:00,577 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 550 transitions, 8717 flow [2024-06-21 22:17:00,577 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 22:17:00,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:00,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:00,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 22:17:00,578 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 22:17:00,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash -425397716, now seen corresponding path program 4 times [2024-06-21 22:17:00,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:00,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165482364] [2024-06-21 22:17:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:00,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:17:03,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:03,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165482364] [2024-06-21 22:17:03,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165482364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:03,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:03,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:17:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659357861] [2024-06-21 22:17:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:03,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:17:03,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:17:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:17:03,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:03,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 550 transitions, 8717 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 22:17:03,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:03,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:03,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:05,449 INFO L124 PetriNetUnfolderBase]: 4203/6635 cut-off events. [2024-06-21 22:17:05,449 INFO L125 PetriNetUnfolderBase]: For 538523/538523 co-relation queries the response was YES. [2024-06-21 22:17:05,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48749 conditions, 6635 events. 4203/6635 cut-off events. For 538523/538523 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 41050 event pairs, 967 based on Foata normal form. 8/6642 useless extension candidates. Maximal degree in co-relation 48584. Up to 5780 conditions per place. [2024-06-21 22:17:05,545 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 497 selfloop transitions, 111 changer transitions 0/613 dead transitions. [2024-06-21 22:17:05,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 613 transitions, 10496 flow [2024-06-21 22:17:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:17:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:17:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 22:17:05,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 22:17:05,547 INFO L175 Difference]: Start difference. First operand has 387 places, 550 transitions, 8717 flow. Second operand 10 states and 191 transitions. [2024-06-21 22:17:05,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 613 transitions, 10496 flow [2024-06-21 22:17:07,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 613 transitions, 10189 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 22:17:07,926 INFO L231 Difference]: Finished difference. Result has 388 places, 559 transitions, 8842 flow [2024-06-21 22:17:07,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8416, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8842, PETRI_PLACES=388, PETRI_TRANSITIONS=559} [2024-06-21 22:17:07,926 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 22:17:07,926 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 559 transitions, 8842 flow [2024-06-21 22:17:07,926 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 22:17:07,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:07,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:07,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 22:17:07,927 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 22:17:07,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash 411364204, now seen corresponding path program 5 times [2024-06-21 22:17:07,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:07,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535783384] [2024-06-21 22:17:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:11,069 INFO 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 22:17:11,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:11,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535783384] [2024-06-21 22:17:11,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535783384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:11,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:11,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:17:11,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275194198] [2024-06-21 22:17:11,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:11,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:17:11,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:17:11,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:17:11,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:11,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 559 transitions, 8842 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 22:17:11,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:11,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:11,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:13,289 INFO L124 PetriNetUnfolderBase]: 4185/6613 cut-off events. [2024-06-21 22:17:13,290 INFO L125 PetriNetUnfolderBase]: For 513185/513185 co-relation queries the response was YES. [2024-06-21 22:17:13,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48120 conditions, 6613 events. 4185/6613 cut-off events. For 513185/513185 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 40988 event pairs, 985 based on Foata normal form. 8/6620 useless extension candidates. Maximal degree in co-relation 47953. Up to 5922 conditions per place. [2024-06-21 22:17:13,370 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 498 selfloop transitions, 102 changer transitions 0/605 dead transitions. [2024-06-21 22:17:13,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 605 transitions, 10220 flow [2024-06-21 22:17:13,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:17:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:17:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 22:17:13,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 22:17:13,372 INFO L175 Difference]: Start difference. First operand has 388 places, 559 transitions, 8842 flow. Second operand 10 states and 182 transitions. [2024-06-21 22:17:13,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 605 transitions, 10220 flow [2024-06-21 22:17:15,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 605 transitions, 9993 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 22:17:15,509 INFO L231 Difference]: Finished difference. Result has 392 places, 559 transitions, 8825 flow [2024-06-21 22:17:15,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8615, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8825, PETRI_PLACES=392, PETRI_TRANSITIONS=559} [2024-06-21 22:17:15,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-21 22:17:15,510 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 559 transitions, 8825 flow [2024-06-21 22:17:15,510 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 22:17:15,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:15,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:15,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 22:17:15,510 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 22:17:15,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash -360699602, now seen corresponding path program 6 times [2024-06-21 22:17:15,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:15,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699445041] [2024-06-21 22:17:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:15,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:18,370 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 22:17:18,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:18,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699445041] [2024-06-21 22:17:18,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699445041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:18,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:18,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:17:18,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906711048] [2024-06-21 22:17:18,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:18,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:17:18,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:18,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:17:18,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:17:18,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:18,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 559 transitions, 8825 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 22:17:18,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:18,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:18,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:20,648 INFO L124 PetriNetUnfolderBase]: 4329/6849 cut-off events. [2024-06-21 22:17:20,648 INFO L125 PetriNetUnfolderBase]: For 523741/523741 co-relation queries the response was YES. [2024-06-21 22:17:20,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49289 conditions, 6849 events. 4329/6849 cut-off events. For 523741/523741 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42548 event pairs, 875 based on Foata normal form. 8/6856 useless extension candidates. Maximal degree in co-relation 49122. Up to 5370 conditions per place. [2024-06-21 22:17:20,746 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 476 selfloop transitions, 136 changer transitions 0/617 dead transitions. [2024-06-21 22:17:20,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 617 transitions, 10531 flow [2024-06-21 22:17:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:17:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:17:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 22:17:20,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 22:17:20,748 INFO L175 Difference]: Start difference. First operand has 392 places, 559 transitions, 8825 flow. Second operand 10 states and 186 transitions. [2024-06-21 22:17:20,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 617 transitions, 10531 flow [2024-06-21 22:17:23,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 617 transitions, 10306 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 22:17:23,035 INFO L231 Difference]: Finished difference. Result has 395 places, 565 transitions, 9040 flow [2024-06-21 22:17:23,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8600, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9040, PETRI_PLACES=395, PETRI_TRANSITIONS=565} [2024-06-21 22:17:23,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-21 22:17:23,035 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 565 transitions, 9040 flow [2024-06-21 22:17:23,036 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 22:17:23,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:23,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:23,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 22:17:23,036 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 22:17:23,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:23,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1243241772, now seen corresponding path program 8 times [2024-06-21 22:17:23,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:23,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519013246] [2024-06-21 22:17:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:25,641 INFO 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 22:17:25,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:25,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519013246] [2024-06-21 22:17:25,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519013246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:25,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:25,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:17:25,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298358728] [2024-06-21 22:17:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:17:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:25,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:17:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:17:25,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:25,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 565 transitions, 9040 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 22:17:25,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:25,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:25,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:28,251 INFO L124 PetriNetUnfolderBase]: 4461/7033 cut-off events. [2024-06-21 22:17:28,251 INFO L125 PetriNetUnfolderBase]: For 539058/539058 co-relation queries the response was YES. [2024-06-21 22:17:28,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51683 conditions, 7033 events. 4461/7033 cut-off events. For 539058/539058 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 43813 event pairs, 1054 based on Foata normal form. 4/7036 useless extension candidates. Maximal degree in co-relation 51514. Up to 5984 conditions per place. [2024-06-21 22:17:28,350 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 453 selfloop transitions, 186 changer transitions 0/644 dead transitions. [2024-06-21 22:17:28,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 644 transitions, 11177 flow [2024-06-21 22:17:28,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:17:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:17:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 228 transitions. [2024-06-21 22:17:28,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 22:17:28,352 INFO L175 Difference]: Start difference. First operand has 395 places, 565 transitions, 9040 flow. Second operand 12 states and 228 transitions. [2024-06-21 22:17:28,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 644 transitions, 11177 flow [2024-06-21 22:17:30,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 644 transitions, 10933 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 22:17:30,756 INFO L231 Difference]: Finished difference. Result has 402 places, 583 transitions, 9534 flow [2024-06-21 22:17:30,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8796, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9534, PETRI_PLACES=402, PETRI_TRANSITIONS=583} [2024-06-21 22:17:30,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 22:17:30,757 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 583 transitions, 9534 flow [2024-06-21 22:17:30,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:30,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:30,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:30,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 22:17:30,757 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 22:17:30,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:30,758 INFO L85 PathProgramCache]: Analyzing trace with hash -843369436, now seen corresponding path program 1 times [2024-06-21 22:17:30,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:30,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28373548] [2024-06-21 22:17:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:30,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:33,798 INFO 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 22:17:33,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:33,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28373548] [2024-06-21 22:17:33,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28373548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:33,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:33,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:17:33,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450759015] [2024-06-21 22:17:33,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:33,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:17:33,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:33,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:17:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:17:33,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:33,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 583 transitions, 9534 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:33,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:33,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:33,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:36,329 INFO L124 PetriNetUnfolderBase]: 4561/7203 cut-off events. [2024-06-21 22:17:36,329 INFO L125 PetriNetUnfolderBase]: For 627800/627802 co-relation queries the response was YES. [2024-06-21 22:17:36,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54271 conditions, 7203 events. 4561/7203 cut-off events. For 627800/627802 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 44977 event pairs, 1023 based on Foata normal form. 10/7212 useless extension candidates. Maximal degree in co-relation 54099. Up to 6060 conditions per place. [2024-06-21 22:17:36,432 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 135 changer transitions 0/643 dead transitions. [2024-06-21 22:17:36,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 643 transitions, 11293 flow [2024-06-21 22:17:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:17:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:17:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 22:17:36,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 22:17:36,434 INFO L175 Difference]: Start difference. First operand has 402 places, 583 transitions, 9534 flow. Second operand 10 states and 193 transitions. [2024-06-21 22:17:36,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 643 transitions, 11293 flow [2024-06-21 22:17:38,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 643 transitions, 10948 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 22:17:38,470 INFO L231 Difference]: Finished difference. Result has 405 places, 587 transitions, 9526 flow [2024-06-21 22:17:38,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9190, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9526, PETRI_PLACES=405, PETRI_TRANSITIONS=587} [2024-06-21 22:17:38,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 22:17:38,470 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 587 transitions, 9526 flow [2024-06-21 22:17:38,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:38,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:38,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:38,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 22:17:38,471 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 22:17:38,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:38,471 INFO L85 PathProgramCache]: Analyzing trace with hash -841491766, now seen corresponding path program 2 times [2024-06-21 22:17:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:38,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277503506] [2024-06-21 22:17:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:38,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:41,577 INFO 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 22:17:41,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:41,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277503506] [2024-06-21 22:17:41,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277503506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:41,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:41,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:17:41,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20168780] [2024-06-21 22:17:41,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:41,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:17:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:17:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:17:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:41,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 587 transitions, 9526 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:41,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:41,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:41,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:44,230 INFO L124 PetriNetUnfolderBase]: 4605/7277 cut-off events. [2024-06-21 22:17:44,230 INFO L125 PetriNetUnfolderBase]: For 659826/659828 co-relation queries the response was YES. [2024-06-21 22:17:44,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54548 conditions, 7277 events. 4605/7277 cut-off events. For 659826/659828 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 45504 event pairs, 1043 based on Foata normal form. 14/7290 useless extension candidates. Maximal degree in co-relation 54376. Up to 6264 conditions per place. [2024-06-21 22:17:44,327 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 129 changer transitions 0/637 dead transitions. [2024-06-21 22:17:44,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 637 transitions, 11006 flow [2024-06-21 22:17:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:17:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:17:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 22:17:44,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-21 22:17:44,328 INFO L175 Difference]: Start difference. First operand has 405 places, 587 transitions, 9526 flow. Second operand 10 states and 187 transitions. [2024-06-21 22:17:44,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 637 transitions, 11006 flow [2024-06-21 22:17:46,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 637 transitions, 10734 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 22:17:46,885 INFO L231 Difference]: Finished difference. Result has 409 places, 588 transitions, 9545 flow [2024-06-21 22:17:46,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9256, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9545, PETRI_PLACES=409, PETRI_TRANSITIONS=588} [2024-06-21 22:17:46,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 22:17:46,886 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 588 transitions, 9545 flow [2024-06-21 22:17:46,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:46,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:46,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:46,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 22:17:46,886 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 22:17:46,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:46,886 INFO L85 PathProgramCache]: Analyzing trace with hash -841495486, now seen corresponding path program 3 times [2024-06-21 22:17:46,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:46,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135060355] [2024-06-21 22:17:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:46,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:50,180 INFO 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 22:17:50,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:50,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135060355] [2024-06-21 22:17:50,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135060355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:50,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:50,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:17:50,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134436805] [2024-06-21 22:17:50,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:50,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:17:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:17:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:17:50,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:50,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 588 transitions, 9545 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:50,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:50,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:50,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:52,761 INFO L124 PetriNetUnfolderBase]: 4633/7317 cut-off events. [2024-06-21 22:17:52,762 INFO L125 PetriNetUnfolderBase]: For 650840/650842 co-relation queries the response was YES. [2024-06-21 22:17:52,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54862 conditions, 7317 events. 4633/7317 cut-off events. For 650840/650842 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 45782 event pairs, 1045 based on Foata normal form. 10/7326 useless extension candidates. Maximal degree in co-relation 54690. Up to 6270 conditions per place. [2024-06-21 22:17:52,853 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 505 selfloop transitions, 131 changer transitions 0/641 dead transitions. [2024-06-21 22:17:52,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 641 transitions, 11051 flow [2024-06-21 22:17:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:17:52,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:17:52,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 22:17:52,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 22:17:52,854 INFO L175 Difference]: Start difference. First operand has 409 places, 588 transitions, 9545 flow. Second operand 10 states and 190 transitions. [2024-06-21 22:17:52,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 641 transitions, 11051 flow [2024-06-21 22:17:55,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 641 transitions, 10719 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 22:17:55,453 INFO L231 Difference]: Finished difference. Result has 410 places, 589 transitions, 9507 flow [2024-06-21 22:17:55,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9213, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9507, PETRI_PLACES=410, PETRI_TRANSITIONS=589} [2024-06-21 22:17:55,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 22:17:55,453 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 589 transitions, 9507 flow [2024-06-21 22:17:55,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:55,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:55,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:55,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 22:17:55,454 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 22:17:55,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:55,454 INFO L85 PathProgramCache]: Analyzing trace with hash -459412746, now seen corresponding path program 4 times [2024-06-21 22:17:55,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:55,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477733931] [2024-06-21 22:17:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:55,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:58,807 INFO 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 22:17:58,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477733931] [2024-06-21 22:17:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477733931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:58,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:58,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:17:58,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850236763] [2024-06-21 22:17:58,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:58,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:17:58,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:17:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:17:58,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:58,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 589 transitions, 9507 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:58,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:58,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:58,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:01,404 INFO L124 PetriNetUnfolderBase]: 4817/7572 cut-off events. [2024-06-21 22:18:01,405 INFO L125 PetriNetUnfolderBase]: For 908031/908031 co-relation queries the response was YES. [2024-06-21 22:18:01,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56416 conditions, 7572 events. 4817/7572 cut-off events. For 908031/908031 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 47356 event pairs, 1093 based on Foata normal form. 56/7627 useless extension candidates. Maximal degree in co-relation 56243. Up to 6538 conditions per place. [2024-06-21 22:18:01,497 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 488 selfloop transitions, 122 changer transitions 16/631 dead transitions. [2024-06-21 22:18:01,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 631 transitions, 10957 flow [2024-06-21 22:18:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:18:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:18:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 22:18:01,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 22:18:01,499 INFO L175 Difference]: Start difference. First operand has 410 places, 589 transitions, 9507 flow. Second operand 10 states and 181 transitions. [2024-06-21 22:18:01,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 631 transitions, 10957 flow [2024-06-21 22:18:03,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 631 transitions, 10677 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 22:18:03,945 INFO L231 Difference]: Finished difference. Result has 412 places, 576 transitions, 9302 flow [2024-06-21 22:18:03,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9227, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9302, PETRI_PLACES=412, PETRI_TRANSITIONS=576} [2024-06-21 22:18:03,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 22:18:03,945 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 576 transitions, 9302 flow [2024-06-21 22:18:03,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:03,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:03,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:03,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 22:18:03,946 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 22:18:03,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash -142005048, now seen corresponding path program 1 times [2024-06-21 22:18:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:03,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177030463] [2024-06-21 22:18:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:03,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:18:07,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:07,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177030463] [2024-06-21 22:18:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177030463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:07,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:07,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:18:07,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260084255] [2024-06-21 22:18:07,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:07,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:18:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:18:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:18:07,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:07,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 576 transitions, 9302 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:07,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:07,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:07,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:10,022 INFO L124 PetriNetUnfolderBase]: 4755/7492 cut-off events. [2024-06-21 22:18:10,023 INFO L125 PetriNetUnfolderBase]: For 904033/904033 co-relation queries the response was YES. [2024-06-21 22:18:10,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55337 conditions, 7492 events. 4755/7492 cut-off events. For 904033/904033 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 46916 event pairs, 1105 based on Foata normal form. 56/7547 useless extension candidates. Maximal degree in co-relation 55163. Up to 6520 conditions per place. [2024-06-21 22:18:10,113 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 483 selfloop transitions, 118 changer transitions 15/621 dead transitions. [2024-06-21 22:18:10,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 621 transitions, 10740 flow [2024-06-21 22:18:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:18:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:18:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 205 transitions. [2024-06-21 22:18:10,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40674603174603174 [2024-06-21 22:18:10,115 INFO L175 Difference]: Start difference. First operand has 412 places, 576 transitions, 9302 flow. Second operand 12 states and 205 transitions. [2024-06-21 22:18:10,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 621 transitions, 10740 flow [2024-06-21 22:18:12,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 621 transitions, 10481 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 22:18:12,666 INFO L231 Difference]: Finished difference. Result has 416 places, 564 transitions, 9126 flow [2024-06-21 22:18:12,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9043, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9126, PETRI_PLACES=416, PETRI_TRANSITIONS=564} [2024-06-21 22:18:12,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 22:18:12,667 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 564 transitions, 9126 flow [2024-06-21 22:18:12,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:12,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:12,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:12,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 22:18:12,668 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 22:18:12,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1941879402, now seen corresponding path program 2 times [2024-06-21 22:18:12,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:12,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580992970] [2024-06-21 22:18:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:12,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:15,722 INFO 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 22:18:15,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:15,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580992970] [2024-06-21 22:18:15,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580992970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:15,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:15,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:18:15,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268898441] [2024-06-21 22:18:15,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:15,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:18:15,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:18:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:18:15,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:15,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 564 transitions, 9126 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:15,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:15,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:15,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:18,092 INFO L124 PetriNetUnfolderBase]: 4691/7410 cut-off events. [2024-06-21 22:18:18,092 INFO L125 PetriNetUnfolderBase]: For 871009/871009 co-relation queries the response was YES. [2024-06-21 22:18:18,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54776 conditions, 7410 events. 4691/7410 cut-off events. For 871009/871009 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 46480 event pairs, 1055 based on Foata normal form. 48/7457 useless extension candidates. Maximal degree in co-relation 54601. Up to 6226 conditions per place. [2024-06-21 22:18:18,197 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 479 selfloop transitions, 107 changer transitions 26/617 dead transitions. [2024-06-21 22:18:18,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 617 transitions, 10668 flow [2024-06-21 22:18:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:18:18,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:18:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 209 transitions. [2024-06-21 22:18:18,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146825396825397 [2024-06-21 22:18:18,198 INFO L175 Difference]: Start difference. First operand has 416 places, 564 transitions, 9126 flow. Second operand 12 states and 209 transitions. [2024-06-21 22:18:18,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 617 transitions, 10668 flow [2024-06-21 22:18:20,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 617 transitions, 10335 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-06-21 22:18:20,834 INFO L231 Difference]: Finished difference. Result has 415 places, 547 transitions, 8666 flow [2024-06-21 22:18:20,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8793, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8666, PETRI_PLACES=415, PETRI_TRANSITIONS=547} [2024-06-21 22:18:20,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 22:18:20,834 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 547 transitions, 8666 flow [2024-06-21 22:18:20,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:20,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:20,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 22:18:20,835 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 22:18:20,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2146013722, now seen corresponding path program 5 times [2024-06-21 22:18:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:20,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601812043] [2024-06-21 22:18:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:20,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:18:24,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:24,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601812043] [2024-06-21 22:18:24,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601812043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:24,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:24,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 22:18:24,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10069370] [2024-06-21 22:18:24,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:24,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 22:18:24,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 22:18:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 22:18:24,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:24,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 547 transitions, 8666 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:24,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:24,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:24,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:26,453 INFO L124 PetriNetUnfolderBase]: 4487/7104 cut-off events. [2024-06-21 22:18:26,453 INFO L125 PetriNetUnfolderBase]: For 838162/838162 co-relation queries the response was YES. [2024-06-21 22:18:26,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51577 conditions, 7104 events. 4487/7104 cut-off events. For 838162/838162 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 44289 event pairs, 1031 based on Foata normal form. 48/7151 useless extension candidates. Maximal degree in co-relation 51401. Up to 6048 conditions per place. [2024-06-21 22:18:26,559 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 476 selfloop transitions, 88 changer transitions 25/594 dead transitions. [2024-06-21 22:18:26,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 594 transitions, 10086 flow [2024-06-21 22:18:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:18:26,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:18:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 22:18:26,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 22:18:26,561 INFO L175 Difference]: Start difference. First operand has 415 places, 547 transitions, 8666 flow. Second operand 10 states and 185 transitions. [2024-06-21 22:18:26,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 594 transitions, 10086 flow [2024-06-21 22:18:29,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 594 transitions, 9706 flow, removed 30 selfloop flow, removed 21 redundant places. [2024-06-21 22:18:29,398 INFO L231 Difference]: Finished difference. Result has 404 places, 528 transitions, 7977 flow [2024-06-21 22:18:29,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8286, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7977, PETRI_PLACES=404, PETRI_TRANSITIONS=528} [2024-06-21 22:18:29,399 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-21 22:18:29,399 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 528 transitions, 7977 flow [2024-06-21 22:18:29,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:29,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:29,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:29,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 22:18:29,400 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 22:18:29,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:29,400 INFO L85 PathProgramCache]: Analyzing trace with hash 194918700, now seen corresponding path program 7 times [2024-06-21 22:18:29,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:29,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410440695] [2024-06-21 22:18:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:29,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:32,680 INFO 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 22:18:32,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:32,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410440695] [2024-06-21 22:18:32,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410440695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:32,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:32,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:32,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142964301] [2024-06-21 22:18:32,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:32,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:32,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:32,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:32,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 528 transitions, 7977 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 22:18:32,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:32,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:32,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:35,072 INFO L124 PetriNetUnfolderBase]: 4275/6791 cut-off events. [2024-06-21 22:18:35,073 INFO L125 PetriNetUnfolderBase]: For 626961/626961 co-relation queries the response was YES. [2024-06-21 22:18:35,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49303 conditions, 6791 events. 4275/6791 cut-off events. For 626961/626961 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42243 event pairs, 897 based on Foata normal form. 8/6798 useless extension candidates. Maximal degree in co-relation 49127. Up to 5490 conditions per place. [2024-06-21 22:18:35,164 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 451 selfloop transitions, 118 changer transitions 0/574 dead transitions. [2024-06-21 22:18:35,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 574 transitions, 9539 flow [2024-06-21 22:18:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:18:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:18:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 22:18:35,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:18:35,166 INFO L175 Difference]: Start difference. First operand has 404 places, 528 transitions, 7977 flow. Second operand 9 states and 168 transitions. [2024-06-21 22:18:35,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 574 transitions, 9539 flow [2024-06-21 22:18:37,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 574 transitions, 9302 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 22:18:37,836 INFO L231 Difference]: Finished difference. Result has 404 places, 529 transitions, 8024 flow [2024-06-21 22:18:37,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7740, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8024, PETRI_PLACES=404, PETRI_TRANSITIONS=529} [2024-06-21 22:18:37,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-21 22:18:37,837 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 529 transitions, 8024 flow [2024-06-21 22:18:37,837 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 22:18:37,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:37,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:37,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 22:18:37,837 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 22:18:37,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:37,838 INFO L85 PathProgramCache]: Analyzing trace with hash -800533158, now seen corresponding path program 8 times [2024-06-21 22:18:37,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:37,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674654764] [2024-06-21 22:18:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:37,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:18:40,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:40,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674654764] [2024-06-21 22:18:40,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674654764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:40,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:40,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:40,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208325543] [2024-06-21 22:18:40,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:40,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:40,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:40,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:40,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 529 transitions, 8024 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 22:18:40,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:40,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:40,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:43,072 INFO L124 PetriNetUnfolderBase]: 4349/6913 cut-off events. [2024-06-21 22:18:43,073 INFO L125 PetriNetUnfolderBase]: For 640029/640029 co-relation queries the response was YES. [2024-06-21 22:18:43,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50346 conditions, 6913 events. 4349/6913 cut-off events. For 640029/640029 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 43262 event pairs, 1085 based on Foata normal form. 8/6920 useless extension candidates. Maximal degree in co-relation 50169. Up to 6204 conditions per place. [2024-06-21 22:18:43,162 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 479 selfloop transitions, 90 changer transitions 0/574 dead transitions. [2024-06-21 22:18:43,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 574 transitions, 9431 flow [2024-06-21 22:18:43,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:18:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:18:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:18:43,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:18:43,176 INFO L175 Difference]: Start difference. First operand has 404 places, 529 transitions, 8024 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:18:43,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 574 transitions, 9431 flow [2024-06-21 22:18:46,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 574 transitions, 9217 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 22:18:46,102 INFO L231 Difference]: Finished difference. Result has 406 places, 534 transitions, 8128 flow [2024-06-21 22:18:46,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7816, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8128, PETRI_PLACES=406, PETRI_TRANSITIONS=534} [2024-06-21 22:18:46,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 22:18:46,103 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 534 transitions, 8128 flow [2024-06-21 22:18:46,103 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 22:18:46,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:46,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:46,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 22:18:46,104 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 22:18:46,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash 668903724, now seen corresponding path program 9 times [2024-06-21 22:18:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:46,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537599927] [2024-06-21 22:18:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:49,224 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 22:18:49,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537599927] [2024-06-21 22:18:49,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537599927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:49,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:49,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871182243] [2024-06-21 22:18:49,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:49,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:49,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:49,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 534 transitions, 8128 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 22:18:49,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:49,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:49,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:51,376 INFO L124 PetriNetUnfolderBase]: 4377/6942 cut-off events. [2024-06-21 22:18:51,376 INFO L125 PetriNetUnfolderBase]: For 620263/620263 co-relation queries the response was YES. [2024-06-21 22:18:51,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50173 conditions, 6942 events. 4377/6942 cut-off events. For 620263/620263 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 43345 event pairs, 1067 based on Foata normal form. 8/6949 useless extension candidates. Maximal degree in co-relation 49996. Up to 6326 conditions per place. [2024-06-21 22:18:51,465 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 82 changer transitions 0/569 dead transitions. [2024-06-21 22:18:51,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 569 transitions, 9442 flow [2024-06-21 22:18:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:18:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:18:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 22:18:51,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 22:18:51,467 INFO L175 Difference]: Start difference. First operand has 406 places, 534 transitions, 8128 flow. Second operand 9 states and 157 transitions. [2024-06-21 22:18:51,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 569 transitions, 9442 flow [2024-06-21 22:18:54,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 569 transitions, 9312 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 22:18:54,300 INFO L231 Difference]: Finished difference. Result has 410 places, 536 transitions, 8251 flow [2024-06-21 22:18:54,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8251, PETRI_PLACES=410, PETRI_TRANSITIONS=536} [2024-06-21 22:18:54,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 22:18:54,300 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 536 transitions, 8251 flow [2024-06-21 22:18:54,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:54,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:54,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:54,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 22:18:54,301 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 22:18:54,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash 283576716, now seen corresponding path program 9 times [2024-06-21 22:18:54,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:54,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407075820] [2024-06-21 22:18:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:54,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:18:57,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:57,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407075820] [2024-06-21 22:18:57,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407075820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:57,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:57,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594224858] [2024-06-21 22:18:57,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:57,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:57,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:57,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:57,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:57,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 536 transitions, 8251 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 22:18:57,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:57,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:57,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:59,717 INFO L124 PetriNetUnfolderBase]: 4353/6921 cut-off events. [2024-06-21 22:18:59,717 INFO L125 PetriNetUnfolderBase]: For 568069/568069 co-relation queries the response was YES. [2024-06-21 22:18:59,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48960 conditions, 6921 events. 4353/6921 cut-off events. For 568069/568069 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 43389 event pairs, 1058 based on Foata normal form. 8/6928 useless extension candidates. Maximal degree in co-relation 48783. Up to 6056 conditions per place. [2024-06-21 22:18:59,801 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 428 selfloop transitions, 143 changer transitions 0/576 dead transitions. [2024-06-21 22:18:59,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 576 transitions, 9725 flow [2024-06-21 22:18:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:18:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:18:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 22:18:59,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:18:59,803 INFO L175 Difference]: Start difference. First operand has 410 places, 536 transitions, 8251 flow. Second operand 9 states and 168 transitions. [2024-06-21 22:18:59,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 576 transitions, 9725 flow [2024-06-21 22:19:02,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 576 transitions, 9547 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 22:19:02,185 INFO L231 Difference]: Finished difference. Result has 413 places, 536 transitions, 8387 flow [2024-06-21 22:19:02,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8387, PETRI_PLACES=413, PETRI_TRANSITIONS=536} [2024-06-21 22:19:02,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 22:19:02,186 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 536 transitions, 8387 flow [2024-06-21 22:19:02,186 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 22:19:02,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:02,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:02,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 22:19:02,186 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 22:19:02,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:02,187 INFO L85 PathProgramCache]: Analyzing trace with hash 402481548, now seen corresponding path program 10 times [2024-06-21 22:19:02,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:02,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514651660] [2024-06-21 22:19:02,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:02,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:05,154 INFO 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 22:19:05,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:05,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514651660] [2024-06-21 22:19:05,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514651660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:05,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:05,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065691991] [2024-06-21 22:19:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:05,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:05,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 536 transitions, 8387 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 22:19:05,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:05,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:05,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:07,603 INFO L124 PetriNetUnfolderBase]: 4457/7074 cut-off events. [2024-06-21 22:19:07,604 INFO L125 PetriNetUnfolderBase]: For 614388/614390 co-relation queries the response was YES. [2024-06-21 22:19:07,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51152 conditions, 7074 events. 4457/7074 cut-off events. For 614388/614390 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 44398 event pairs, 872 based on Foata normal form. 10/7083 useless extension candidates. Maximal degree in co-relation 50976. Up to 5036 conditions per place. [2024-06-21 22:19:07,701 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 287 changer transitions 0/592 dead transitions. [2024-06-21 22:19:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 592 transitions, 10630 flow [2024-06-21 22:19:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:19:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:19:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 22:19:07,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 22:19:07,703 INFO L175 Difference]: Start difference. First operand has 413 places, 536 transitions, 8387 flow. Second operand 9 states and 173 transitions. [2024-06-21 22:19:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 592 transitions, 10630 flow [2024-06-21 22:19:09,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 592 transitions, 10348 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 22:19:09,889 INFO L231 Difference]: Finished difference. Result has 415 places, 548 transitions, 8995 flow [2024-06-21 22:19:09,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8111, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8995, PETRI_PLACES=415, PETRI_TRANSITIONS=548} [2024-06-21 22:19:09,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 22:19:09,890 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 548 transitions, 8995 flow [2024-06-21 22:19:09,890 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 22:19:09,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:09,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:09,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 22:19:09,891 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 22:19:09,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1550431784, now seen corresponding path program 11 times [2024-06-21 22:19:09,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:09,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658447888] [2024-06-21 22:19:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:09,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:12,870 INFO 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 22:19:12,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:12,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658447888] [2024-06-21 22:19:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658447888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:12,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:12,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582307431] [2024-06-21 22:19:12,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:12,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:12,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:12,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 548 transitions, 8995 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 22:19:12,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:12,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:12,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:15,370 INFO L124 PetriNetUnfolderBase]: 4529/7192 cut-off events. [2024-06-21 22:19:15,370 INFO L125 PetriNetUnfolderBase]: For 642633/642635 co-relation queries the response was YES. [2024-06-21 22:19:15,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53152 conditions, 7192 events. 4529/7192 cut-off events. For 642633/642635 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 45250 event pairs, 840 based on Foata normal form. 10/7201 useless extension candidates. Maximal degree in co-relation 52976. Up to 5092 conditions per place. [2024-06-21 22:19:15,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 305 selfloop transitions, 288 changer transitions 0/598 dead transitions. [2024-06-21 22:19:15,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 598 transitions, 11178 flow [2024-06-21 22:19:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:19:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:19:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 22:19:15,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 22:19:15,473 INFO L175 Difference]: Start difference. First operand has 415 places, 548 transitions, 8995 flow. Second operand 9 states and 171 transitions. [2024-06-21 22:19:15,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 598 transitions, 11178 flow [2024-06-21 22:19:18,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 598 transitions, 10434 flow, removed 137 selfloop flow, removed 8 redundant places. [2024-06-21 22:19:18,034 INFO L231 Difference]: Finished difference. Result has 416 places, 557 transitions, 9087 flow [2024-06-21 22:19:18,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8344, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9087, PETRI_PLACES=416, PETRI_TRANSITIONS=557} [2024-06-21 22:19:18,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 22:19:18,035 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 557 transitions, 9087 flow [2024-06-21 22:19:18,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:18,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:18,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:18,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 22:19:18,037 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 22:19:18,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:18,038 INFO L85 PathProgramCache]: Analyzing trace with hash 698056938, now seen corresponding path program 12 times [2024-06-21 22:19:18,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:18,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340713301] [2024-06-21 22:19:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:18,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:21,105 INFO 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 22:19:21,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:21,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340713301] [2024-06-21 22:19:21,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340713301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:21,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:21,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:21,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415873922] [2024-06-21 22:19:21,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:21,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:21,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:21,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:21,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:21,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:21,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 557 transitions, 9087 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 22:19:21,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:21,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:21,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:23,641 INFO L124 PetriNetUnfolderBase]: 4505/7166 cut-off events. [2024-06-21 22:19:23,643 INFO L125 PetriNetUnfolderBase]: For 596778/596780 co-relation queries the response was YES. [2024-06-21 22:19:23,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51222 conditions, 7166 events. 4505/7166 cut-off events. For 596778/596780 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 45170 event pairs, 840 based on Foata normal form. 10/7175 useless extension candidates. Maximal degree in co-relation 51048. Up to 5076 conditions per place. [2024-06-21 22:19:23,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 297 changer transitions 0/596 dead transitions. [2024-06-21 22:19:23,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 596 transitions, 10816 flow [2024-06-21 22:19:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:19:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:19:23,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 22:19:23,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 22:19:23,740 INFO L175 Difference]: Start difference. First operand has 416 places, 557 transitions, 9087 flow. Second operand 9 states and 168 transitions. [2024-06-21 22:19:23,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 596 transitions, 10816 flow [2024-06-21 22:19:26,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 596 transitions, 10343 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-21 22:19:26,173 INFO L231 Difference]: Finished difference. Result has 420 places, 557 transitions, 9226 flow [2024-06-21 22:19:26,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8618, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9226, PETRI_PLACES=420, PETRI_TRANSITIONS=557} [2024-06-21 22:19:26,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-21 22:19:26,174 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 557 transitions, 9226 flow [2024-06-21 22:19:26,174 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 22:19:26,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:26,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:26,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 22:19:26,174 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 22:19:26,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:26,174 INFO L85 PathProgramCache]: Analyzing trace with hash -215363658, now seen corresponding path program 13 times [2024-06-21 22:19:26,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:26,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858695332] [2024-06-21 22:19:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:26,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:29,506 INFO 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 22:19:29,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:29,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858695332] [2024-06-21 22:19:29,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858695332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:29,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:29,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730434739] [2024-06-21 22:19:29,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:29,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:29,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 557 transitions, 9226 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 22:19:29,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:29,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:29,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:31,909 INFO L124 PetriNetUnfolderBase]: 4557/7226 cut-off events. [2024-06-21 22:19:31,909 INFO L125 PetriNetUnfolderBase]: For 603003/603003 co-relation queries the response was YES. [2024-06-21 22:19:31,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51982 conditions, 7226 events. 4557/7226 cut-off events. For 603003/603003 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 45518 event pairs, 1097 based on Foata normal form. 4/7229 useless extension candidates. Maximal degree in co-relation 51808. Up to 6440 conditions per place. [2024-06-21 22:19:32,007 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 468 selfloop transitions, 123 changer transitions 0/596 dead transitions. [2024-06-21 22:19:32,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 596 transitions, 10824 flow [2024-06-21 22:19:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:19:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:19:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 184 transitions. [2024-06-21 22:19:32,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39826839826839827 [2024-06-21 22:19:32,009 INFO L175 Difference]: Start difference. First operand has 420 places, 557 transitions, 9226 flow. Second operand 11 states and 184 transitions. [2024-06-21 22:19:32,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 596 transitions, 10824 flow [2024-06-21 22:19:34,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 596 transitions, 10190 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 22:19:34,374 INFO L231 Difference]: Finished difference. Result has 422 places, 563 transitions, 8976 flow [2024-06-21 22:19:34,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8606, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8976, PETRI_PLACES=422, PETRI_TRANSITIONS=563} [2024-06-21 22:19:34,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 22:19:34,380 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 563 transitions, 8976 flow [2024-06-21 22:19:34,380 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 22:19:34,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:34,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:34,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 22:19:34,380 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 22:19:34,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:34,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1424722570, now seen corresponding path program 14 times [2024-06-21 22:19:34,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:34,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21967948] [2024-06-21 22:19:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:37,485 INFO 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 22:19:37,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:37,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21967948] [2024-06-21 22:19:37,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21967948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:37,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:37,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:37,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818593812] [2024-06-21 22:19:37,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:37,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:37,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:37,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 563 transitions, 8976 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 22:19:37,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:37,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:37,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:39,937 INFO L124 PetriNetUnfolderBase]: 4577/7264 cut-off events. [2024-06-21 22:19:39,937 INFO L125 PetriNetUnfolderBase]: For 599415/599415 co-relation queries the response was YES. [2024-06-21 22:19:40,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51256 conditions, 7264 events. 4577/7264 cut-off events. For 599415/599415 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 45870 event pairs, 1099 based on Foata normal form. 4/7267 useless extension candidates. Maximal degree in co-relation 51082. Up to 6456 conditions per place. [2024-06-21 22:19:40,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 469 selfloop transitions, 122 changer transitions 0/596 dead transitions. [2024-06-21 22:19:40,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 596 transitions, 10508 flow [2024-06-21 22:19:40,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:19:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:19:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:19:40,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:19:40,033 INFO L175 Difference]: Start difference. First operand has 422 places, 563 transitions, 8976 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:19:40,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 596 transitions, 10508 flow [2024-06-21 22:19:42,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 596 transitions, 10319 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 22:19:42,551 INFO L231 Difference]: Finished difference. Result has 423 places, 566 transitions, 9103 flow [2024-06-21 22:19:42,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8797, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9103, PETRI_PLACES=423, PETRI_TRANSITIONS=566} [2024-06-21 22:19:42,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-21 22:19:42,563 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 566 transitions, 9103 flow [2024-06-21 22:19:42,563 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 22:19:42,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:42,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:42,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 22:19:42,563 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 22:19:42,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash -414665448, now seen corresponding path program 15 times [2024-06-21 22:19:42,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:42,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663047151] [2024-06-21 22:19:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:42,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:19:45,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:45,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663047151] [2024-06-21 22:19:45,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663047151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:45,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:45,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108886511] [2024-06-21 22:19:45,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:45,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:45,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:45,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:45,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:45,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 566 transitions, 9103 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 22:19:45,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:45,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:45,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:48,007 INFO L124 PetriNetUnfolderBase]: 4565/7246 cut-off events. [2024-06-21 22:19:48,007 INFO L125 PetriNetUnfolderBase]: For 577457/577457 co-relation queries the response was YES. [2024-06-21 22:19:48,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51003 conditions, 7246 events. 4565/7246 cut-off events. For 577457/577457 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 45686 event pairs, 1105 based on Foata normal form. 4/7249 useless extension candidates. Maximal degree in co-relation 50828. Up to 6448 conditions per place. [2024-06-21 22:19:48,096 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 469 selfloop transitions, 121 changer transitions 0/595 dead transitions. [2024-06-21 22:19:48,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 595 transitions, 10365 flow [2024-06-21 22:19:48,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:19:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:19:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 22:19:48,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 22:19:48,098 INFO L175 Difference]: Start difference. First operand has 423 places, 566 transitions, 9103 flow. Second operand 9 states and 158 transitions. [2024-06-21 22:19:48,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 595 transitions, 10365 flow [2024-06-21 22:19:51,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 595 transitions, 10092 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 22:19:51,089 INFO L231 Difference]: Finished difference. Result has 425 places, 566 transitions, 9082 flow [2024-06-21 22:19:51,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9082, PETRI_PLACES=425, PETRI_TRANSITIONS=566} [2024-06-21 22:19:51,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-21 22:19:51,090 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 566 transitions, 9082 flow [2024-06-21 22:19:51,090 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 22:19:51,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:51,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:51,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 22:19:51,091 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 22:19:51,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:51,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1575998520, now seen corresponding path program 10 times [2024-06-21 22:19:51,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:51,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226145693] [2024-06-21 22:19:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:51,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:55,488 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 22:19:55,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:55,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226145693] [2024-06-21 22:19:55,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226145693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:55,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:55,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688160201] [2024-06-21 22:19:55,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:55,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:55,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:55,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 566 transitions, 9082 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 22:19:55,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:55,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:55,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:57,727 INFO L124 PetriNetUnfolderBase]: 4547/7214 cut-off events. [2024-06-21 22:19:57,727 INFO L125 PetriNetUnfolderBase]: For 556113/556113 co-relation queries the response was YES. [2024-06-21 22:19:57,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49869 conditions, 7214 events. 4547/7214 cut-off events. For 556113/556113 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 45420 event pairs, 1134 based on Foata normal form. 8/7214 useless extension candidates. Maximal degree in co-relation 49694. Up to 6562 conditions per place. [2024-06-21 22:19:57,831 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 507 selfloop transitions, 79 changer transitions 0/591 dead transitions. [2024-06-21 22:19:57,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 591 transitions, 10362 flow [2024-06-21 22:19:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:19:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:19:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 22:19:57,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 22:19:57,832 INFO L175 Difference]: Start difference. First operand has 425 places, 566 transitions, 9082 flow. Second operand 9 states and 147 transitions. [2024-06-21 22:19:57,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 591 transitions, 10362 flow [2024-06-21 22:20:00,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 591 transitions, 10066 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 22:20:00,920 INFO L231 Difference]: Finished difference. Result has 424 places, 566 transitions, 8948 flow [2024-06-21 22:20:00,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8786, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8948, PETRI_PLACES=424, PETRI_TRANSITIONS=566} [2024-06-21 22:20:00,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-21 22:20:00,921 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 566 transitions, 8948 flow [2024-06-21 22:20:00,921 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 22:20:00,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:00,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:00,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 22:20:00,922 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 22:20:00,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:00,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1090618810, now seen corresponding path program 16 times [2024-06-21 22:20:00,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:00,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657880583] [2024-06-21 22:20:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:00,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:03,963 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 22:20:03,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:03,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657880583] [2024-06-21 22:20:03,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657880583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:03,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:03,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:03,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804288738] [2024-06-21 22:20:03,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:03,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:03,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:03,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:03,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:03,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:03,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 566 transitions, 8948 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 22:20:03,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:03,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:03,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:06,504 INFO L124 PetriNetUnfolderBase]: 4587/7290 cut-off events. [2024-06-21 22:20:06,504 INFO L125 PetriNetUnfolderBase]: For 557406/557406 co-relation queries the response was YES. [2024-06-21 22:20:06,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50087 conditions, 7290 events. 4587/7290 cut-off events. For 557406/557406 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 46053 event pairs, 961 based on Foata normal form. 8/7290 useless extension candidates. Maximal degree in co-relation 49912. Up to 5130 conditions per place. [2024-06-21 22:20:06,608 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 301 changer transitions 0/609 dead transitions. [2024-06-21 22:20:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 609 transitions, 10839 flow [2024-06-21 22:20:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:20:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:20:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 22:20:06,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 22:20:06,609 INFO L175 Difference]: Start difference. First operand has 424 places, 566 transitions, 8948 flow. Second operand 9 states and 167 transitions. [2024-06-21 22:20:06,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 609 transitions, 10839 flow [2024-06-21 22:20:09,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 609 transitions, 10558 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 22:20:09,421 INFO L231 Difference]: Finished difference. Result has 426 places, 572 transitions, 9427 flow [2024-06-21 22:20:09,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8667, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9427, PETRI_PLACES=426, PETRI_TRANSITIONS=572} [2024-06-21 22:20:09,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 22:20:09,422 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 572 transitions, 9427 flow [2024-06-21 22:20:09,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:09,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:09,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:09,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 22:20:09,422 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 22:20:09,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1386194200, now seen corresponding path program 17 times [2024-06-21 22:20:09,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:09,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670422243] [2024-06-21 22:20:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:09,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:12,584 INFO 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 22:20:12,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670422243] [2024-06-21 22:20:12,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670422243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:12,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:12,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:12,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952093138] [2024-06-21 22:20:12,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:12,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:12,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:12,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:12,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:12,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 572 transitions, 9427 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 22:20:12,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:12,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:12,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:14,924 INFO L124 PetriNetUnfolderBase]: 4659/7406 cut-off events. [2024-06-21 22:20:14,925 INFO L125 PetriNetUnfolderBase]: For 593429/593429 co-relation queries the response was YES. [2024-06-21 22:20:15,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52269 conditions, 7406 events. 4659/7406 cut-off events. For 593429/593429 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 46904 event pairs, 957 based on Foata normal form. 8/7406 useless extension candidates. Maximal degree in co-relation 52094. Up to 5186 conditions per place. [2024-06-21 22:20:15,028 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 307 selfloop transitions, 304 changer transitions 0/616 dead transitions. [2024-06-21 22:20:15,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 616 transitions, 11630 flow [2024-06-21 22:20:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:20:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:20:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:20:15,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:20:15,029 INFO L175 Difference]: Start difference. First operand has 426 places, 572 transitions, 9427 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:20:15,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 616 transitions, 11630 flow [2024-06-21 22:20:17,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 616 transitions, 10502 flow, removed 106 selfloop flow, removed 9 redundant places. [2024-06-21 22:20:17,765 INFO L231 Difference]: Finished difference. Result has 426 places, 581 transitions, 9157 flow [2024-06-21 22:20:17,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8386, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9157, PETRI_PLACES=426, PETRI_TRANSITIONS=581} [2024-06-21 22:20:17,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 22:20:17,780 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 581 transitions, 9157 flow [2024-06-21 22:20:17,780 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 22:20:17,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:17,781 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, 1] [2024-06-21 22:20:17,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 22:20:17,781 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 22:20:17,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:17,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1098950680, now seen corresponding path program 18 times [2024-06-21 22:20:17,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:17,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009602502] [2024-06-21 22:20:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:20:20,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:20,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009602502] [2024-06-21 22:20:20,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009602502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:20,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:20,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222945695] [2024-06-21 22:20:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:20,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:20,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 581 transitions, 9157 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 22:20:20,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:20,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:20,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:23,476 INFO L124 PetriNetUnfolderBase]: 4635/7374 cut-off events. [2024-06-21 22:20:23,476 INFO L125 PetriNetUnfolderBase]: For 545976/545976 co-relation queries the response was YES. [2024-06-21 22:20:23,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50173 conditions, 7374 events. 4635/7374 cut-off events. For 545976/545976 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 46773 event pairs, 953 based on Foata normal form. 8/7374 useless extension candidates. Maximal degree in co-relation 49998. Up to 5170 conditions per place. [2024-06-21 22:20:23,578 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 302 changer transitions 0/616 dead transitions. [2024-06-21 22:20:23,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 616 transitions, 10916 flow [2024-06-21 22:20:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:20:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:20:23,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 22:20:23,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 22:20:23,580 INFO L175 Difference]: Start difference. First operand has 426 places, 581 transitions, 9157 flow. Second operand 9 states and 166 transitions. [2024-06-21 22:20:23,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 616 transitions, 10916 flow [2024-06-21 22:20:25,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 616 transitions, 10223 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-21 22:20:25,869 INFO L231 Difference]: Finished difference. Result has 430 places, 581 transitions, 9078 flow [2024-06-21 22:20:25,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8464, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9078, PETRI_PLACES=430, PETRI_TRANSITIONS=581} [2024-06-21 22:20:25,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-21 22:20:25,870 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 581 transitions, 9078 flow [2024-06-21 22:20:25,870 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 22:20:25,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:25,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:25,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 22:20:25,870 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 22:20:25,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1545220470, now seen corresponding path program 19 times [2024-06-21 22:20:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614651701] [2024-06-21 22:20:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:25,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:28,878 INFO 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 22:20:28,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:28,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614651701] [2024-06-21 22:20:28,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614651701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:28,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:28,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:28,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128387799] [2024-06-21 22:20:28,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:28,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:28,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:28,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 581 transitions, 9078 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 22:20:28,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:28,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:28,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:31,285 INFO L124 PetriNetUnfolderBase]: 4655/7439 cut-off events. [2024-06-21 22:20:31,285 INFO L125 PetriNetUnfolderBase]: For 535208/535208 co-relation queries the response was YES. [2024-06-21 22:20:31,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50157 conditions, 7439 events. 4655/7439 cut-off events. For 535208/535208 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 47749 event pairs, 1622 based on Foata normal form. 4/7442 useless extension candidates. Maximal degree in co-relation 49981. Up to 6899 conditions per place. [2024-06-21 22:20:31,383 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 573 selfloop transitions, 33 changer transitions 0/611 dead transitions. [2024-06-21 22:20:31,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 611 transitions, 10426 flow [2024-06-21 22:20:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:20:31,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:20:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 22:20:31,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 22:20:31,384 INFO L175 Difference]: Start difference. First operand has 430 places, 581 transitions, 9078 flow. Second operand 9 states and 149 transitions. [2024-06-21 22:20:31,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 611 transitions, 10426 flow [2024-06-21 22:20:34,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 611 transitions, 9800 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 22:20:34,076 INFO L231 Difference]: Finished difference. Result has 431 places, 584 transitions, 8590 flow [2024-06-21 22:20:34,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8458, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8590, PETRI_PLACES=431, PETRI_TRANSITIONS=584} [2024-06-21 22:20:34,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-21 22:20:34,076 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 584 transitions, 8590 flow [2024-06-21 22:20:34,076 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 22:20:34,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:34,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:34,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 22:20:34,077 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 22:20:34,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:34,077 INFO L85 PathProgramCache]: Analyzing trace with hash -541330586, now seen corresponding path program 20 times [2024-06-21 22:20:34,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:34,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42592344] [2024-06-21 22:20:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:34,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:20:37,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:37,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42592344] [2024-06-21 22:20:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42592344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:37,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:37,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:37,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004715092] [2024-06-21 22:20:37,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:37,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:37,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:37,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:37,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 584 transitions, 8590 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 22:20:37,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:37,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:37,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:39,834 INFO L124 PetriNetUnfolderBase]: 4707/7482 cut-off events. [2024-06-21 22:20:39,835 INFO L125 PetriNetUnfolderBase]: For 558165/558165 co-relation queries the response was YES. [2024-06-21 22:20:39,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49895 conditions, 7482 events. 4707/7482 cut-off events. For 558165/558165 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 47530 event pairs, 873 based on Foata normal form. 4/7478 useless extension candidates. Maximal degree in co-relation 49718. Up to 5226 conditions per place. [2024-06-21 22:20:39,925 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 299 selfloop transitions, 316 changer transitions 0/620 dead transitions. [2024-06-21 22:20:39,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 620 transitions, 10450 flow [2024-06-21 22:20:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:20:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:20:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 22:20:39,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-21 22:20:39,927 INFO L175 Difference]: Start difference. First operand has 431 places, 584 transitions, 8590 flow. Second operand 10 states and 173 transitions. [2024-06-21 22:20:39,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 620 transitions, 10450 flow [2024-06-21 22:20:43,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 620 transitions, 10352 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 22:20:43,183 INFO L231 Difference]: Finished difference. Result has 434 places, 590 transitions, 9250 flow [2024-06-21 22:20:43,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8492, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9250, PETRI_PLACES=434, PETRI_TRANSITIONS=590} [2024-06-21 22:20:43,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 22:20:43,184 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 590 transitions, 9250 flow [2024-06-21 22:20:43,184 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 22:20:43,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:43,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:43,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 22:20:43,185 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:43,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:43,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1764764230, now seen corresponding path program 21 times [2024-06-21 22:20:43,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:43,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171672768] [2024-06-21 22:20:43,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:43,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:20:46,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:46,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171672768] [2024-06-21 22:20:46,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171672768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:46,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:46,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:46,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519078475] [2024-06-21 22:20:46,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:46,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:46,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:46,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:46,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:46,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:46,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 590 transitions, 9250 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 22:20:46,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:46,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:46,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:49,208 INFO L124 PetriNetUnfolderBase]: 4695/7462 cut-off events. [2024-06-21 22:20:49,208 INFO L125 PetriNetUnfolderBase]: For 550619/550619 co-relation queries the response was YES. [2024-06-21 22:20:49,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 7462 events. 4695/7462 cut-off events. For 550619/550619 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 47434 event pairs, 871 based on Foata normal form. 4/7458 useless extension candidates. Maximal degree in co-relation 50471. Up to 5218 conditions per place. [2024-06-21 22:20:49,305 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 314 changer transitions 0/619 dead transitions. [2024-06-21 22:20:49,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 619 transitions, 10774 flow [2024-06-21 22:20:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:20:49,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:20:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 22:20:49,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 22:20:49,306 INFO L175 Difference]: Start difference. First operand has 434 places, 590 transitions, 9250 flow. Second operand 9 states and 160 transitions. [2024-06-21 22:20:49,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 619 transitions, 10774 flow [2024-06-21 22:20:52,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 619 transitions, 10217 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 22:20:52,010 INFO L231 Difference]: Finished difference. Result has 437 places, 590 transitions, 9327 flow [2024-06-21 22:20:52,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8693, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9327, PETRI_PLACES=437, PETRI_TRANSITIONS=590} [2024-06-21 22:20:52,010 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-21 22:20:52,010 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 590 transitions, 9327 flow [2024-06-21 22:20:52,010 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 22:20:52,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:52,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:52,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 22:20:52,011 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:52,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:52,011 INFO L85 PathProgramCache]: Analyzing trace with hash -799743614, now seen corresponding path program 22 times [2024-06-21 22:20:52,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:52,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682395470] [2024-06-21 22:20:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:52,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:55,171 INFO 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 22:20:55,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:55,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682395470] [2024-06-21 22:20:55,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682395470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:55,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:55,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:55,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575454447] [2024-06-21 22:20:55,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:55,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:55,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:55,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:55,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:55,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 590 transitions, 9327 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 22:20:55,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:55,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:55,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:57,404 INFO L124 PetriNetUnfolderBase]: 4715/7523 cut-off events. [2024-06-21 22:20:57,404 INFO L125 PetriNetUnfolderBase]: For 567613/567613 co-relation queries the response was YES. [2024-06-21 22:20:57,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50870 conditions, 7523 events. 4715/7523 cut-off events. For 567613/567613 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48250 event pairs, 1753 based on Foata normal form. 4/7526 useless extension candidates. Maximal degree in co-relation 50691. Up to 7029 conditions per place. [2024-06-21 22:20:57,498 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 584 selfloop transitions, 26 changer transitions 0/615 dead transitions. [2024-06-21 22:20:57,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 615 transitions, 10672 flow [2024-06-21 22:20:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:20:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:20:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 22:20:57,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 22:20:57,500 INFO L175 Difference]: Start difference. First operand has 437 places, 590 transitions, 9327 flow. Second operand 9 states and 142 transitions. [2024-06-21 22:20:57,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 615 transitions, 10672 flow [2024-06-21 22:20:59,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 615 transitions, 10034 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 22:20:59,947 INFO L231 Difference]: Finished difference. Result has 438 places, 593 transitions, 8822 flow [2024-06-21 22:20:59,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8695, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8822, PETRI_PLACES=438, PETRI_TRANSITIONS=593} [2024-06-21 22:20:59,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 22:20:59,947 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 593 transitions, 8822 flow [2024-06-21 22:20:59,948 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 22:20:59,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:59,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:59,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 22:20:59,948 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:59,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:59,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1060174484, now seen corresponding path program 23 times [2024-06-21 22:20:59,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:59,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359315362] [2024-06-21 22:20:59,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:59,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:02,916 INFO 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 22:21:02,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:02,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359315362] [2024-06-21 22:21:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359315362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:02,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:02,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:02,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827852004] [2024-06-21 22:21:02,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:02,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:02,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:02,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:02,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 593 transitions, 8822 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 22:21:02,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:02,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:02,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:05,461 INFO L124 PetriNetUnfolderBase]: 4799/7628 cut-off events. [2024-06-21 22:21:05,462 INFO L125 PetriNetUnfolderBase]: For 616874/616874 co-relation queries the response was YES. [2024-06-21 22:21:05,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51304 conditions, 7628 events. 4799/7628 cut-off events. For 616874/616874 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 48608 event pairs, 1158 based on Foata normal form. 4/7624 useless extension candidates. Maximal degree in co-relation 51124. Up to 6380 conditions per place. [2024-06-21 22:21:05,554 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 450 selfloop transitions, 178 changer transitions 0/633 dead transitions. [2024-06-21 22:21:05,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 633 transitions, 10787 flow [2024-06-21 22:21:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 22:21:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 22:21:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-21 22:21:05,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:21:05,555 INFO L175 Difference]: Start difference. First operand has 438 places, 593 transitions, 8822 flow. Second operand 13 states and 208 transitions. [2024-06-21 22:21:05,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 633 transitions, 10787 flow [2024-06-21 22:21:08,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 633 transitions, 10697 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 22:21:08,202 INFO L231 Difference]: Finished difference. Result has 444 places, 602 transitions, 9289 flow [2024-06-21 22:21:08,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9289, PETRI_PLACES=444, PETRI_TRANSITIONS=602} [2024-06-21 22:21:08,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 22:21:08,202 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 602 transitions, 9289 flow [2024-06-21 22:21:08,202 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 22:21:08,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:08,203 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, 1, 1] [2024-06-21 22:21:08,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 22:21:08,203 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:08,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -191474408, now seen corresponding path program 24 times [2024-06-21 22:21:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:08,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778082470] [2024-06-21 22:21:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:11,188 INFO 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 22:21:11,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:11,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778082470] [2024-06-21 22:21:11,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778082470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:11,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:11,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:11,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070111898] [2024-06-21 22:21:11,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:11,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:11,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:11,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:11,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 602 transitions, 9289 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 22:21:11,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:11,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:11,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:13,365 INFO L124 PetriNetUnfolderBase]: 4819/7660 cut-off events. [2024-06-21 22:21:13,366 INFO L125 PetriNetUnfolderBase]: For 631644/631644 co-relation queries the response was YES. [2024-06-21 22:21:13,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52134 conditions, 7660 events. 4819/7660 cut-off events. For 631644/631644 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 48855 event pairs, 1156 based on Foata normal form. 4/7656 useless extension candidates. Maximal degree in co-relation 51953. Up to 6396 conditions per place. [2024-06-21 22:21:13,473 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 456 selfloop transitions, 174 changer transitions 0/635 dead transitions. [2024-06-21 22:21:13,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 635 transitions, 11356 flow [2024-06-21 22:21:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:21:13,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:21:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 22:21:13,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 22:21:13,475 INFO L175 Difference]: Start difference. First operand has 444 places, 602 transitions, 9289 flow. Second operand 11 states and 185 transitions. [2024-06-21 22:21:13,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 635 transitions, 11356 flow [2024-06-21 22:21:16,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 635 transitions, 10713 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-06-21 22:21:16,795 INFO L231 Difference]: Finished difference. Result has 444 places, 605 transitions, 9069 flow [2024-06-21 22:21:16,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8666, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9069, PETRI_PLACES=444, PETRI_TRANSITIONS=605} [2024-06-21 22:21:16,797 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 22:21:16,797 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 605 transitions, 9069 flow [2024-06-21 22:21:16,797 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 22:21:16,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:16,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:21:16,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 22:21:16,797 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:16,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1746082906, now seen corresponding path program 25 times [2024-06-21 22:21:16,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:16,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527503797] [2024-06-21 22:21:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:20,594 INFO 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 22:21:20,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:20,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527503797] [2024-06-21 22:21:20,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527503797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:20,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:20,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:20,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772549698] [2024-06-21 22:21:20,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:20,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:20,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:20,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:20,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 605 transitions, 9069 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 22:21:20,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:20,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:20,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:23,296 INFO L124 PetriNetUnfolderBase]: 4807/7667 cut-off events. [2024-06-21 22:21:23,296 INFO L125 PetriNetUnfolderBase]: For 614545/614545 co-relation queries the response was YES. [2024-06-21 22:21:23,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50972 conditions, 7667 events. 4807/7667 cut-off events. For 614545/614545 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 49360 event pairs, 1773 based on Foata normal form. 4/7670 useless extension candidates. Maximal degree in co-relation 50791. Up to 7033 conditions per place. [2024-06-21 22:21:23,402 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 587 selfloop transitions, 45 changer transitions 0/637 dead transitions. [2024-06-21 22:21:23,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 637 transitions, 10633 flow [2024-06-21 22:21:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 22:21:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 22:21:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 197 transitions. [2024-06-21 22:21:23,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608058608058608 [2024-06-21 22:21:23,403 INFO L175 Difference]: Start difference. First operand has 444 places, 605 transitions, 9069 flow. Second operand 13 states and 197 transitions. [2024-06-21 22:21:23,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 637 transitions, 10633 flow [2024-06-21 22:21:26,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 637 transitions, 10150 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 22:21:26,914 INFO L231 Difference]: Finished difference. Result has 449 places, 605 transitions, 8682 flow [2024-06-21 22:21:26,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8682, PETRI_PLACES=449, PETRI_TRANSITIONS=605} [2024-06-21 22:21:26,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-21 22:21:26,914 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 605 transitions, 8682 flow [2024-06-21 22:21:26,914 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 22:21:26,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:26,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:21:26,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 22:21:26,915 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:26,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1564791248, now seen corresponding path program 26 times [2024-06-21 22:21:26,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:26,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080973976] [2024-06-21 22:21:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:26,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:29,873 INFO 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 22:21:29,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080973976] [2024-06-21 22:21:29,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080973976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:29,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:29,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971220781] [2024-06-21 22:21:29,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:29,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:29,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:29,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:29,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:29,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 605 transitions, 8682 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 22:21:29,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:29,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:29,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:32,363 INFO L124 PetriNetUnfolderBase]: 4795/7630 cut-off events. [2024-06-21 22:21:32,364 INFO L125 PetriNetUnfolderBase]: For 587860/587860 co-relation queries the response was YES. [2024-06-21 22:21:32,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49840 conditions, 7630 events. 4795/7630 cut-off events. For 587860/587860 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 48678 event pairs, 1150 based on Foata normal form. 4/7626 useless extension candidates. Maximal degree in co-relation 49658. Up to 6380 conditions per place. [2024-06-21 22:21:32,462 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 455 selfloop transitions, 175 changer transitions 0/635 dead transitions. [2024-06-21 22:21:32,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 635 transitions, 10692 flow [2024-06-21 22:21:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:21:32,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:21:32,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 22:21:32,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004329004329004 [2024-06-21 22:21:32,464 INFO L175 Difference]: Start difference. First operand has 449 places, 605 transitions, 8682 flow. Second operand 11 states and 185 transitions. [2024-06-21 22:21:32,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 635 transitions, 10692 flow [2024-06-21 22:21:35,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 635 transitions, 10472 flow, removed 38 selfloop flow, removed 12 redundant places. [2024-06-21 22:21:35,236 INFO L231 Difference]: Finished difference. Result has 448 places, 605 transitions, 8818 flow [2024-06-21 22:21:35,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8818, PETRI_PLACES=448, PETRI_TRANSITIONS=605} [2024-06-21 22:21:35,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-21 22:21:35,236 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 605 transitions, 8818 flow [2024-06-21 22:21:35,237 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 22:21:35,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:35,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:21:35,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 22:21:35,238 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:35,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:35,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2045534230, now seen corresponding path program 27 times [2024-06-21 22:21:35,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:35,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448286385] [2024-06-21 22:21:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:35,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:21:38,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:38,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448286385] [2024-06-21 22:21:38,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448286385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:38,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:38,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648492723] [2024-06-21 22:21:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:38,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:38,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:38,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:38,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:38,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 605 transitions, 8818 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 22:21:38,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:38,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:38,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:40,955 INFO L124 PetriNetUnfolderBase]: 4783/7639 cut-off events. [2024-06-21 22:21:40,956 INFO L125 PetriNetUnfolderBase]: For 575335/575335 co-relation queries the response was YES. [2024-06-21 22:21:41,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49684 conditions, 7639 events. 4783/7639 cut-off events. For 575335/575335 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 49296 event pairs, 1765 based on Foata normal form. 4/7642 useless extension candidates. Maximal degree in co-relation 49501. Up to 7009 conditions per place. [2024-06-21 22:21:41,053 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 580 selfloop transitions, 46 changer transitions 0/631 dead transitions. [2024-06-21 22:21:41,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 631 transitions, 10362 flow [2024-06-21 22:21:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 22:21:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 22:21:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2024-06-21 22:21:41,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531746031746032 [2024-06-21 22:21:41,055 INFO L175 Difference]: Start difference. First operand has 448 places, 605 transitions, 8818 flow. Second operand 12 states and 178 transitions. [2024-06-21 22:21:41,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 631 transitions, 10362 flow [2024-06-21 22:21:44,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 631 transitions, 9904 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 22:21:44,599 INFO L231 Difference]: Finished difference. Result has 450 places, 605 transitions, 8458 flow [2024-06-21 22:21:44,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8360, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8458, PETRI_PLACES=450, PETRI_TRANSITIONS=605} [2024-06-21 22:21:44,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-21 22:21:44,600 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 605 transitions, 8458 flow [2024-06-21 22:21:44,600 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 22:21:44,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:44,600 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, 1] [2024-06-21 22:21:44,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 22:21:44,600 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:44,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash 488305712, now seen corresponding path program 28 times [2024-06-21 22:21:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:44,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982691814] [2024-06-21 22:21:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:44,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:47,435 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 22:21:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982691814] [2024-06-21 22:21:47,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982691814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:47,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:47,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:47,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678320957] [2024-06-21 22:21:47,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:47,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:47,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:47,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:47,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 605 transitions, 8458 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 22:21:47,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:47,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:47,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:49,535 INFO L124 PetriNetUnfolderBase]: 4803/7642 cut-off events. [2024-06-21 22:21:49,536 INFO L125 PetriNetUnfolderBase]: For 576989/576989 co-relation queries the response was YES. [2024-06-21 22:21:49,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49209 conditions, 7642 events. 4803/7642 cut-off events. For 576989/576989 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 48771 event pairs, 1174 based on Foata normal form. 4/7638 useless extension candidates. Maximal degree in co-relation 49025. Up to 6388 conditions per place. [2024-06-21 22:21:49,655 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 453 selfloop transitions, 174 changer transitions 0/632 dead transitions. [2024-06-21 22:21:49,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 632 transitions, 10293 flow [2024-06-21 22:21:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:21:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:21:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 22:21:49,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:21:49,657 INFO L175 Difference]: Start difference. First operand has 450 places, 605 transitions, 8458 flow. Second operand 9 states and 153 transitions. [2024-06-21 22:21:49,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 632 transitions, 10293 flow [2024-06-21 22:21:53,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 632 transitions, 10135 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-21 22:21:53,504 INFO L231 Difference]: Finished difference. Result has 446 places, 608 transitions, 8715 flow [2024-06-21 22:21:53,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8715, PETRI_PLACES=446, PETRI_TRANSITIONS=608} [2024-06-21 22:21:53,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 22:21:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 608 transitions, 8715 flow [2024-06-21 22:21:53,504 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 22:21:53,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:53,505 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, 1, 1] [2024-06-21 22:21:53,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 22:21:53,505 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:53,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:53,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1665572116, now seen corresponding path program 29 times [2024-06-21 22:21:53,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:53,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907121044] [2024-06-21 22:21:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:56,540 INFO 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 22:21:56,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:56,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907121044] [2024-06-21 22:21:56,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907121044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:56,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:56,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:56,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850209961] [2024-06-21 22:21:56,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:56,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:56,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:56,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:56,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:56,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 608 transitions, 8715 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 22:21:56,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:56,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:56,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:58,947 INFO L124 PetriNetUnfolderBase]: 4791/7622 cut-off events. [2024-06-21 22:21:58,947 INFO L125 PetriNetUnfolderBase]: For 561565/561565 co-relation queries the response was YES. [2024-06-21 22:21:59,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49175 conditions, 7622 events. 4791/7622 cut-off events. For 561565/561565 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 48629 event pairs, 1172 based on Foata normal form. 4/7618 useless extension candidates. Maximal degree in co-relation 48990. Up to 6380 conditions per place. [2024-06-21 22:21:59,058 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 450 selfloop transitions, 176 changer transitions 0/631 dead transitions. [2024-06-21 22:21:59,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 631 transitions, 10257 flow [2024-06-21 22:21:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:21:59,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:21:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:21:59,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 22:21:59,060 INFO L175 Difference]: Start difference. First operand has 446 places, 608 transitions, 8715 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:21:59,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 631 transitions, 10257 flow [2024-06-21 22:22:02,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 631 transitions, 9793 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 22:22:02,382 INFO L231 Difference]: Finished difference. Result has 447 places, 608 transitions, 8609 flow [2024-06-21 22:22:02,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8251, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8609, PETRI_PLACES=447, PETRI_TRANSITIONS=608} [2024-06-21 22:22:02,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-21 22:22:02,383 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 608 transitions, 8609 flow [2024-06-21 22:22:02,383 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 22:22:02,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:22:02,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:22:02,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 22:22:02,383 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:22:02,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:22:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1790549488, now seen corresponding path program 30 times [2024-06-21 22:22:02,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:22:02,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595736593] [2024-06-21 22:22:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:22:02,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:22:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:22:05,754 INFO 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 22:22:05,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:22:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595736593] [2024-06-21 22:22:05,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595736593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:22:05,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:22:05,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:22:05,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975535340] [2024-06-21 22:22:05,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:22:05,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:22:05,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:22:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:22:05,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:22:05,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:22:05,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 608 transitions, 8609 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 22:22:05,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:22:05,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:22:05,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15