./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.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/safe009_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe009_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:37:14,704 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:37:14,781 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:37:14,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:37:14,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:37:14,817 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:37:14,818 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:37:14,818 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:37:14,819 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:37:14,823 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:37:14,823 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:37:14,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:37:14,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:37:14,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:37:14,826 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:37:14,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:37:14,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:37:14,827 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:37:14,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:37:14,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:37:14,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:37:14,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:37:14,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:37:14,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:37:14,830 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:37:14,830 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:37:14,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:37:14,830 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:37:14,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:37:14,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:37:14,832 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:37:14,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:37:14,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:37:14,846 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:37:14,846 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:37:14,847 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:37:14,847 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:37:14,847 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:37:14,847 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:37:14,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:37:14,848 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:37:14,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:37:14,849 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:37:14,849 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:37:15,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:37:15,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:37:15,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:37:15,212 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:37:15,213 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:37:15,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i [2024-06-21 21:37:16,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:37:16,640 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:37:16,645 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_power.opt.i [2024-06-21 21:37:16,660 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b11cd1a/119587bc66224791b473058db38b514b/FLAG939419d9e [2024-06-21 21:37:16,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1b11cd1a/119587bc66224791b473058db38b514b [2024-06-21 21:37:16,674 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:37:16,674 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:37:16,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe009_power.opt.yml/witness.yml [2024-06-21 21:37:16,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:37:16,932 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:37:16,933 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:37:16,933 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:37:16,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:37:16,938 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:37:16" (1/2) ... [2024-06-21 21:37:16,939 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cdb6f43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:37:16, skipping insertion in model container [2024-06-21 21:37:16,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:37:16" (1/2) ... [2024-06-21 21:37:16,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e240eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:37:16, skipping insertion in model container [2024-06-21 21:37:16,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:37:16" (2/2) ... [2024-06-21 21:37:16,942 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cdb6f43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:16, skipping insertion in model container [2024-06-21 21:37:16,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:37:16" (2/2) ... [2024-06-21 21:37:16,943 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:37:17,065 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:37:17,067 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 21:37:17,067 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 21:37:17,067 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p1_EAX$flush_delayed == (_Bool)0) && __unbuffered_p1_EAX$mem_tmp == 0) && __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p1_EAX$w_buff0 == 0) && __unbuffered_p1_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p1_EAX$w_buff1 == 0) && __unbuffered_p1_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd2 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd2 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (__unbuffered_p1_EAX$read_delayed_var == & x && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1)) [2024-06-21 21:37:17,067 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:37:17,068 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-21 21:37:17,101 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:37:17,452 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:37:17,462 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:37:17,622 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:37:17,664 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:37:17,664 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17 WrapperNode [2024-06-21 21:37:17,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:37:17,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:37:17,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:37:17,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:37:17,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,760 INFO L138 Inliner]: procedures = 175, calls = 84, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 253 [2024-06-21 21:37:17,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:37:17,763 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:37:17,764 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:37:17,764 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:37:17,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,791 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,850 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-21 21:37:17,851 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,851 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,885 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,903 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,917 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:37:17,925 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:37:17,925 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:37:17,925 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:37:17,926 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (1/1) ... [2024-06-21 21:37:17,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:37:17,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:37:17,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:37:18,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:37:18,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 21:37:18,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 21:37:18,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 21:37:18,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 21:37:18,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:37:18,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:37:18,030 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:37:18,030 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:37:18,030 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:37:18,031 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:37:18,031 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:37:18,031 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:37:18,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:37:18,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 21:37:18,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:37:18,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:37:18,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:37:18,033 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:37:18,161 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:37:18,163 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:37:18,659 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:37:18,659 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:37:19,118 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:37:19,118 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:37:19,119 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:37:19 BoogieIcfgContainer [2024-06-21 21:37:19,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:37:19,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:37:19,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:37:19,124 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:37:19,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:37:16" (1/4) ... [2024-06-21 21:37:19,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e185a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:37:19, skipping insertion in model container [2024-06-21 21:37:19,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:37:16" (2/4) ... [2024-06-21 21:37:19,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e185a7c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:37:19, skipping insertion in model container [2024-06-21 21:37:19,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:37:17" (3/4) ... [2024-06-21 21:37:19,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e185a7c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:37:19, skipping insertion in model container [2024-06-21 21:37:19,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:37:19" (4/4) ... [2024-06-21 21:37:19,127 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_power.opt.i [2024-06-21 21:37:19,144 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:37:19,144 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:37:19,144 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:37:19,234 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:37:19,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 21:37:19,307 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 21:37:19,308 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:37:19,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 53 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:37:19,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 21:37:19,313 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 21:37:19,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:37:19,339 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;@273a3d4f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:37:19,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:37:19,344 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:37:19,345 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:37:19,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:37:19,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:19,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:37:19,346 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:19,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:19,355 INFO L85 PathProgramCache]: Analyzing trace with hash 845599057, now seen corresponding path program 1 times [2024-06-21 21:37:19,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:19,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597962386] [2024-06-21 21:37:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:19,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:21,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:21,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597962386] [2024-06-21 21:37:21,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597962386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:21,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:21,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:37:21,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596502409] [2024-06-21 21:37:21,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:21,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:37:21,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:37:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:37:21,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 21:37:21,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:21,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:21,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 21:37:21,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:22,216 INFO L124 PetriNetUnfolderBase]: 1205/1833 cut-off events. [2024-06-21 21:37:22,217 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 21:37:22,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3738 conditions, 1833 events. 1205/1833 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8339 event pairs, 800 based on Foata normal form. 1/1797 useless extension candidates. Maximal degree in co-relation 3726. Up to 1818 conditions per place. [2024-06-21 21:37:22,232 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 21:37:22,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 181 flow [2024-06-21 21:37:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:37:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:37:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-06-21 21:37:22,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-21 21:37:22,246 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 66 transitions. [2024-06-21 21:37:22,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 181 flow [2024-06-21 21:37:22,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:22,251 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 21:37:22,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 21:37:22,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 21:37:22,256 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 21:37:22,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:22,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:22,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:37:22,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:22,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1284884533, now seen corresponding path program 1 times [2024-06-21 21:37:22,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044425176] [2024-06-21 21:37:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:22,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:24,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:24,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044425176] [2024-06-21 21:37:24,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044425176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:24,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:24,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:37:24,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371515803] [2024-06-21 21:37:24,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:24,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:37:24,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:37:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:37:24,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 21:37:24,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 21:37:24,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:24,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 21:37:24,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:25,356 INFO L124 PetriNetUnfolderBase]: 1460/2208 cut-off events. [2024-06-21 21:37:25,356 INFO L125 PetriNetUnfolderBase]: For 387/393 co-relation queries the response was YES. [2024-06-21 21:37:25,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5081 conditions, 2208 events. 1460/2208 cut-off events. For 387/393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9918 event pairs, 758 based on Foata normal form. 7/2210 useless extension candidates. Maximal degree in co-relation 5069. Up to 2154 conditions per place. [2024-06-21 21:37:25,371 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 21:37:25,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 57 transitions, 262 flow [2024-06-21 21:37:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:37:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:37:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-21 21:37:25,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-21 21:37:25,376 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 84 transitions. [2024-06-21 21:37:25,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 57 transitions, 262 flow [2024-06-21 21:37:25,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:37:25,380 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 21:37:25,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 21:37:25,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 21:37:25,383 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 21:37:25,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 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 21:37:25,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:25,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:25,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:37:25,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:25,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:25,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1176716593, now seen corresponding path program 1 times [2024-06-21 21:37:25,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:25,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117248529] [2024-06-21 21:37:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:25,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:28,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:28,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117248529] [2024-06-21 21:37:28,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117248529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:28,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:28,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:37:28,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898157175] [2024-06-21 21:37:28,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:28,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:37:28,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:37:28,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:37:28,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 21:37:28,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:28,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:28,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 21:37:28,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:29,091 INFO L124 PetriNetUnfolderBase]: 1454/2199 cut-off events. [2024-06-21 21:37:29,091 INFO L125 PetriNetUnfolderBase]: For 1112/1124 co-relation queries the response was YES. [2024-06-21 21:37:29,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5609 conditions, 2199 events. 1454/2199 cut-off events. For 1112/1124 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9869 event pairs, 628 based on Foata normal form. 11/2205 useless extension candidates. Maximal degree in co-relation 5595. Up to 2126 conditions per place. [2024-06-21 21:37:29,105 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-21 21:37:29,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 348 flow [2024-06-21 21:37:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:37:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:37:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-21 21:37:29,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-21 21:37:29,107 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 103 transitions. [2024-06-21 21:37:29,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 348 flow [2024-06-21 21:37:29,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 334 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 21:37:29,110 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-21 21:37:29,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 21:37:29,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-21 21:37:29,112 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-21 21:37:29,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:29,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:29,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:29,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:37:29,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:29,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2118477780, now seen corresponding path program 1 times [2024-06-21 21:37:29,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:29,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833011237] [2024-06-21 21:37:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:29,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:32,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833011237] [2024-06-21 21:37:32,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833011237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:32,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:32,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:37:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738681934] [2024-06-21 21:37:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:32,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:37:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:37:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:37:32,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 21:37:32,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:32,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:32,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 21:37:32,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:32,928 INFO L124 PetriNetUnfolderBase]: 1445/2184 cut-off events. [2024-06-21 21:37:32,929 INFO L125 PetriNetUnfolderBase]: For 2022/2034 co-relation queries the response was YES. [2024-06-21 21:37:32,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6088 conditions, 2184 events. 1445/2184 cut-off events. For 2022/2034 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9770 event pairs, 483 based on Foata normal form. 14/2193 useless extension candidates. Maximal degree in co-relation 6073. Up to 2073 conditions per place. [2024-06-21 21:37:32,941 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 60 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 21:37:32,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 406 flow [2024-06-21 21:37:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:37:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:37:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 21:37:32,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 21:37:32,947 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 117 transitions. [2024-06-21 21:37:32,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 406 flow [2024-06-21 21:37:32,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:32,954 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 191 flow [2024-06-21 21:37:32,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-21 21:37:32,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 21:37:32,955 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 191 flow [2024-06-21 21:37:32,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:32,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:32,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:32,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:37:32,957 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:32,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:32,958 INFO L85 PathProgramCache]: Analyzing trace with hash 595435315, now seen corresponding path program 1 times [2024-06-21 21:37:32,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:32,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870032006] [2024-06-21 21:37:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:32,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:35,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:35,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870032006] [2024-06-21 21:37:35,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870032006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:35,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:35,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:37:35,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127971847] [2024-06-21 21:37:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:35,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:37:35,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:37:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:37:35,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 21:37:35,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:35,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:35,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 21:37:35,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:36,089 INFO L124 PetriNetUnfolderBase]: 1179/1793 cut-off events. [2024-06-21 21:37:36,089 INFO L125 PetriNetUnfolderBase]: For 2640/2640 co-relation queries the response was YES. [2024-06-21 21:37:36,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5413 conditions, 1793 events. 1179/1793 cut-off events. For 2640/2640 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8095 event pairs, 492 based on Foata normal form. 2/1791 useless extension candidates. Maximal degree in co-relation 5396. Up to 1767 conditions per place. [2024-06-21 21:37:36,105 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-21 21:37:36,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 59 transitions, 351 flow [2024-06-21 21:37:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:37:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:37:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 21:37:36,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-21 21:37:36,111 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 191 flow. Second operand 5 states and 84 transitions. [2024-06-21 21:37:36,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 59 transitions, 351 flow [2024-06-21 21:37:36,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 318 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:36,116 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 204 flow [2024-06-21 21:37:36,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-21 21:37:36,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 21:37:36,120 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 204 flow [2024-06-21 21:37:36,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:36,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:36,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:36,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:37:36,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:36,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1278627620, now seen corresponding path program 1 times [2024-06-21 21:37:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:36,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312404162] [2024-06-21 21:37:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:38,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:38,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312404162] [2024-06-21 21:37:38,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312404162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:38,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:38,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:37:38,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455489293] [2024-06-21 21:37:38,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:38,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:37:38,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:37:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:37:38,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:37:38,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:38,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:38,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:37:38,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:39,955 INFO L124 PetriNetUnfolderBase]: 1453/2194 cut-off events. [2024-06-21 21:37:39,956 INFO L125 PetriNetUnfolderBase]: For 4349/4349 co-relation queries the response was YES. [2024-06-21 21:37:39,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6896 conditions, 2194 events. 1453/2194 cut-off events. For 4349/4349 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9822 event pairs, 520 based on Foata normal form. 8/2199 useless extension candidates. Maximal degree in co-relation 6877. Up to 2077 conditions per place. [2024-06-21 21:37:39,972 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 68 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-06-21 21:37:39,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 523 flow [2024-06-21 21:37:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:37:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:37:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 21:37:39,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 21:37:39,974 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 204 flow. Second operand 6 states and 105 transitions. [2024-06-21 21:37:39,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 523 flow [2024-06-21 21:37:39,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 86 transitions, 488 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:39,981 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 303 flow [2024-06-21 21:37:39,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2024-06-21 21:37:39,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 21:37:39,984 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 303 flow [2024-06-21 21:37:39,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:39,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:39,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:37:39,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:39,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash 223064681, now seen corresponding path program 1 times [2024-06-21 21:37:39,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:39,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308925058] [2024-06-21 21:37:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:39,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:43,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308925058] [2024-06-21 21:37:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308925058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:43,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:43,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:43,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288440028] [2024-06-21 21:37:43,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:43,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:43,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:43,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:43,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:37:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 303 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:43,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:43,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:37:43,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:44,262 INFO L124 PetriNetUnfolderBase]: 1466/2215 cut-off events. [2024-06-21 21:37:44,263 INFO L125 PetriNetUnfolderBase]: For 6245/6257 co-relation queries the response was YES. [2024-06-21 21:37:44,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7885 conditions, 2215 events. 1466/2215 cut-off events. For 6245/6257 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9919 event pairs, 538 based on Foata normal form. 10/2220 useless extension candidates. Maximal degree in co-relation 7863. Up to 2150 conditions per place. [2024-06-21 21:37:44,279 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-21 21:37:44,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 552 flow [2024-06-21 21:37:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:37:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:37:44,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-21 21:37:44,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 21:37:44,282 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 303 flow. Second operand 6 states and 99 transitions. [2024-06-21 21:37:44,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 552 flow [2024-06-21 21:37:44,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 85 transitions, 540 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-21 21:37:44,290 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 353 flow [2024-06-21 21:37:44,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2024-06-21 21:37:44,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 21:37:44,291 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 353 flow [2024-06-21 21:37:44,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:44,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:44,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:44,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:37:44,292 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:44,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash -574510261, now seen corresponding path program 1 times [2024-06-21 21:37:44,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:44,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600039260] [2024-06-21 21:37:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:46,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600039260] [2024-06-21 21:37:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600039260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:46,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:46,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:46,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754672176] [2024-06-21 21:37:46,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:46,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:46,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:46,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:46,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:37:46,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 353 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:46,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:46,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:37:46,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:48,053 INFO L124 PetriNetUnfolderBase]: 1584/2381 cut-off events. [2024-06-21 21:37:48,053 INFO L125 PetriNetUnfolderBase]: For 8558/8570 co-relation queries the response was YES. [2024-06-21 21:37:48,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9024 conditions, 2381 events. 1584/2381 cut-off events. For 8558/8570 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10743 event pairs, 485 based on Foata normal form. 16/2392 useless extension candidates. Maximal degree in co-relation 8999. Up to 2134 conditions per place. [2024-06-21 21:37:48,064 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 32 changer transitions 0/102 dead transitions. [2024-06-21 21:37:48,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 727 flow [2024-06-21 21:37:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:37:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:37:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 21:37:48,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 21:37:48,066 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 353 flow. Second operand 8 states and 128 transitions. [2024-06-21 21:37:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 727 flow [2024-06-21 21:37:48,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 689 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:37:48,074 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 515 flow [2024-06-21 21:37:48,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=515, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-06-21 21:37:48,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-21 21:37:48,076 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 515 flow [2024-06-21 21:37:48,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:48,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:48,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:48,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:37:48,077 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:48,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash -592385047, now seen corresponding path program 2 times [2024-06-21 21:37:48,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:48,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475384428] [2024-06-21 21:37:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:48,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:50,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:50,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475384428] [2024-06-21 21:37:50,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475384428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:50,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:50,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:50,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191634444] [2024-06-21 21:37:50,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:50,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:50,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:50,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:50,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:50,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:37:50,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 515 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:50,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:50,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:37:50,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:51,309 INFO L124 PetriNetUnfolderBase]: 1605/2411 cut-off events. [2024-06-21 21:37:51,309 INFO L125 PetriNetUnfolderBase]: For 11571/11583 co-relation queries the response was YES. [2024-06-21 21:37:51,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10269 conditions, 2411 events. 1605/2411 cut-off events. For 11571/11583 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10816 event pairs, 554 based on Foata normal form. 10/2416 useless extension candidates. Maximal degree in co-relation 10241. Up to 2320 conditions per place. [2024-06-21 21:37:51,321 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 87 selfloop transitions, 18 changer transitions 0/108 dead transitions. [2024-06-21 21:37:51,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 108 transitions, 891 flow [2024-06-21 21:37:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:51,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 21:37:51,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-21 21:37:51,323 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 515 flow. Second operand 7 states and 114 transitions. [2024-06-21 21:37:51,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 108 transitions, 891 flow [2024-06-21 21:37:51,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 848 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:51,338 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 609 flow [2024-06-21 21:37:51,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=609, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-21 21:37:51,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-21 21:37:51,339 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 609 flow [2024-06-21 21:37:51,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:51,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:51,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:51,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:37:51,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:51,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 400553507, now seen corresponding path program 2 times [2024-06-21 21:37:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:51,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439056568] [2024-06-21 21:37:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:53,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:53,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439056568] [2024-06-21 21:37:53,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439056568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:53,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:53,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:37:53,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871188737] [2024-06-21 21:37:53,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:53,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:37:53,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:53,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:37:53,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:37:53,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:37:53,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 609 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:53,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:53,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:37:53,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:54,882 INFO L124 PetriNetUnfolderBase]: 1655/2481 cut-off events. [2024-06-21 21:37:54,882 INFO L125 PetriNetUnfolderBase]: For 12588/12600 co-relation queries the response was YES. [2024-06-21 21:37:54,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11033 conditions, 2481 events. 1655/2481 cut-off events. For 12588/12600 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11242 event pairs, 492 based on Foata normal form. 16/2492 useless extension candidates. Maximal degree in co-relation 11002. Up to 2084 conditions per place. [2024-06-21 21:37:54,899 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 85 selfloop transitions, 42 changer transitions 0/130 dead transitions. [2024-06-21 21:37:54,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 130 transitions, 1121 flow [2024-06-21 21:37:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:54,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:37:54,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 21:37:54,902 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 609 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:37:54,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 130 transitions, 1121 flow [2024-06-21 21:37:54,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 1078 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 21:37:54,919 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 823 flow [2024-06-21 21:37:54,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2024-06-21 21:37:54,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-21 21:37:54,920 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 823 flow [2024-06-21 21:37:54,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:54,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:54,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:54,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:37:54,921 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:54,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:54,922 INFO L85 PathProgramCache]: Analyzing trace with hash 400562435, now seen corresponding path program 1 times [2024-06-21 21:37:54,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:54,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564146743] [2024-06-21 21:37:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:54,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:37:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:37:57,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:37:57,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564146743] [2024-06-21 21:37:57,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564146743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:37:57,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:37:57,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:37:57,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298407528] [2024-06-21 21:37:57,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:37:57,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:37:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:37:57,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:37:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:37:58,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:37:58,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 823 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:58,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:37:58,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:37:58,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:37:59,132 INFO L124 PetriNetUnfolderBase]: 1707/2563 cut-off events. [2024-06-21 21:37:59,132 INFO L125 PetriNetUnfolderBase]: For 17028/17028 co-relation queries the response was YES. [2024-06-21 21:37:59,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12383 conditions, 2563 events. 1707/2563 cut-off events. For 17028/17028 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11715 event pairs, 499 based on Foata normal form. 16/2576 useless extension candidates. Maximal degree in co-relation 12348. Up to 2352 conditions per place. [2024-06-21 21:37:59,148 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 115 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-06-21 21:37:59,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 1275 flow [2024-06-21 21:37:59,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:37:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:37:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 21:37:59,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 21:37:59,151 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 823 flow. Second operand 7 states and 124 transitions. [2024-06-21 21:37:59,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 1275 flow [2024-06-21 21:37:59,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 137 transitions, 1225 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-21 21:37:59,170 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 851 flow [2024-06-21 21:37:59,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2024-06-21 21:37:59,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-21 21:37:59,171 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 851 flow [2024-06-21 21:37:59,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:37:59,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:37:59,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:37:59,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:37:59,172 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:37:59,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:37:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1675017807, now seen corresponding path program 1 times [2024-06-21 21:37:59,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:37:59,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540595640] [2024-06-21 21:37:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:37:59,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:37:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:02,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:02,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540595640] [2024-06-21 21:38:02,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540595640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:02,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:02,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:02,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987137567] [2024-06-21 21:38:02,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:02,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:02,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:02,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:02,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 851 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:02,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:02,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:02,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:03,529 INFO L124 PetriNetUnfolderBase]: 1738/2612 cut-off events. [2024-06-21 21:38:03,529 INFO L125 PetriNetUnfolderBase]: For 17884/17927 co-relation queries the response was YES. [2024-06-21 21:38:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12488 conditions, 2612 events. 1738/2612 cut-off events. For 17884/17927 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11957 event pairs, 581 based on Foata normal form. 27/2632 useless extension candidates. Maximal degree in co-relation 12450. Up to 2463 conditions per place. [2024-06-21 21:38:03,544 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 114 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2024-06-21 21:38:03,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 143 transitions, 1337 flow [2024-06-21 21:38:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:38:03,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:38:03,546 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 851 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:38:03,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 143 transitions, 1337 flow [2024-06-21 21:38:03,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 143 transitions, 1285 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:38:03,567 INFO L231 Difference]: Finished difference. Result has 87 places, 104 transitions, 937 flow [2024-06-21 21:38:03,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=937, PETRI_PLACES=87, PETRI_TRANSITIONS=104} [2024-06-21 21:38:03,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-21 21:38:03,568 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 104 transitions, 937 flow [2024-06-21 21:38:03,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:03,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:03,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:03,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:38:03,569 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:03,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:03,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1187784304, now seen corresponding path program 1 times [2024-06-21 21:38:03,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:03,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165303792] [2024-06-21 21:38:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:03,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:07,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165303792] [2024-06-21 21:38:07,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165303792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:07,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:07,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:07,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069067384] [2024-06-21 21:38:07,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:07,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:07,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:07,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:07,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:07,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 104 transitions, 937 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:07,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:07,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:07,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:08,200 INFO L124 PetriNetUnfolderBase]: 1856/2776 cut-off events. [2024-06-21 21:38:08,201 INFO L125 PetriNetUnfolderBase]: For 21152/21164 co-relation queries the response was YES. [2024-06-21 21:38:08,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13678 conditions, 2776 events. 1856/2776 cut-off events. For 21152/21164 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12759 event pairs, 550 based on Foata normal form. 16/2787 useless extension candidates. Maximal degree in co-relation 13639. Up to 2608 conditions per place. [2024-06-21 21:38:08,217 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 128 selfloop transitions, 26 changer transitions 0/157 dead transitions. [2024-06-21 21:38:08,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 157 transitions, 1575 flow [2024-06-21 21:38:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:38:08,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:38:08,219 INFO L175 Difference]: Start difference. First operand has 87 places, 104 transitions, 937 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:38:08,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 157 transitions, 1575 flow [2024-06-21 21:38:08,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 157 transitions, 1518 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:08,248 INFO L231 Difference]: Finished difference. Result has 94 places, 120 transitions, 1154 flow [2024-06-21 21:38:08,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1154, PETRI_PLACES=94, PETRI_TRANSITIONS=120} [2024-06-21 21:38:08,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-21 21:38:08,249 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 120 transitions, 1154 flow [2024-06-21 21:38:08,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:08,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:08,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:08,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:38:08,250 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:08,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:08,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1187784459, now seen corresponding path program 2 times [2024-06-21 21:38:08,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:08,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775870654] [2024-06-21 21:38:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:08,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:11,197 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 21:38:11,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:11,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775870654] [2024-06-21 21:38:11,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775870654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:11,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:11,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:11,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686890787] [2024-06-21 21:38:11,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:11,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:11,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:11,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:11,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:11,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:11,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 120 transitions, 1154 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:11,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:11,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:11,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:12,071 INFO L124 PetriNetUnfolderBase]: 1851/2769 cut-off events. [2024-06-21 21:38:12,071 INFO L125 PetriNetUnfolderBase]: For 25541/25556 co-relation queries the response was YES. [2024-06-21 21:38:12,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14728 conditions, 2769 events. 1851/2769 cut-off events. For 25541/25556 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12689 event pairs, 578 based on Foata normal form. 12/2776 useless extension candidates. Maximal degree in co-relation 14684. Up to 2693 conditions per place. [2024-06-21 21:38:12,086 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 15 changer transitions 0/151 dead transitions. [2024-06-21 21:38:12,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 151 transitions, 1564 flow [2024-06-21 21:38:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 21:38:12,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-21 21:38:12,088 INFO L175 Difference]: Start difference. First operand has 94 places, 120 transitions, 1154 flow. Second operand 7 states and 113 transitions. [2024-06-21 21:38:12,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 151 transitions, 1564 flow [2024-06-21 21:38:12,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 151 transitions, 1497 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 21:38:12,120 INFO L231 Difference]: Finished difference. Result has 99 places, 123 transitions, 1177 flow [2024-06-21 21:38:12,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=99, PETRI_TRANSITIONS=123} [2024-06-21 21:38:12,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-21 21:38:12,121 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 123 transitions, 1177 flow [2024-06-21 21:38:12,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:12,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:12,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:12,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:38:12,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:12,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1184059654, now seen corresponding path program 2 times [2024-06-21 21:38:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:12,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465013064] [2024-06-21 21:38:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:14,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:14,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465013064] [2024-06-21 21:38:14,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465013064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:14,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:14,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:14,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228979828] [2024-06-21 21:38:14,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:14,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:14,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:14,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:14,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:14,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 123 transitions, 1177 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:14,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:14,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:14,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:16,004 INFO L124 PetriNetUnfolderBase]: 2142/3192 cut-off events. [2024-06-21 21:38:16,005 INFO L125 PetriNetUnfolderBase]: For 33487/33502 co-relation queries the response was YES. [2024-06-21 21:38:16,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17456 conditions, 3192 events. 2142/3192 cut-off events. For 33487/33502 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14987 event pairs, 485 based on Foata normal form. 18/3205 useless extension candidates. Maximal degree in co-relation 17410. Up to 2635 conditions per place. [2024-06-21 21:38:16,022 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 134 selfloop transitions, 65 changer transitions 0/202 dead transitions. [2024-06-21 21:38:16,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 202 transitions, 2160 flow [2024-06-21 21:38:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:38:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:38:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-21 21:38:16,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-21 21:38:16,024 INFO L175 Difference]: Start difference. First operand has 99 places, 123 transitions, 1177 flow. Second operand 11 states and 182 transitions. [2024-06-21 21:38:16,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 202 transitions, 2160 flow [2024-06-21 21:38:16,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 202 transitions, 2094 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 21:38:16,061 INFO L231 Difference]: Finished difference. Result has 108 places, 157 transitions, 1675 flow [2024-06-21 21:38:16,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1675, PETRI_PLACES=108, PETRI_TRANSITIONS=157} [2024-06-21 21:38:16,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-21 21:38:16,062 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 157 transitions, 1675 flow [2024-06-21 21:38:16,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:16,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:16,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:16,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:38:16,063 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:16,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:16,064 INFO L85 PathProgramCache]: Analyzing trace with hash -629952634, now seen corresponding path program 3 times [2024-06-21 21:38:16,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:16,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834605071] [2024-06-21 21:38:16,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:16,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:18,428 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 21:38:18,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:18,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834605071] [2024-06-21 21:38:18,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834605071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:18,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:18,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:18,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975079363] [2024-06-21 21:38:18,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:18,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:18,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:18,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:18,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:18,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:18,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 157 transitions, 1675 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:18,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:18,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:18,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:20,313 INFO L124 PetriNetUnfolderBase]: 2392/3551 cut-off events. [2024-06-21 21:38:20,313 INFO L125 PetriNetUnfolderBase]: For 43349/43367 co-relation queries the response was YES. [2024-06-21 21:38:20,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21741 conditions, 3551 events. 2392/3551 cut-off events. For 43349/43367 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16991 event pairs, 500 based on Foata normal form. 21/3567 useless extension candidates. Maximal degree in co-relation 21691. Up to 2633 conditions per place. [2024-06-21 21:38:20,337 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 150 selfloop transitions, 86 changer transitions 0/239 dead transitions. [2024-06-21 21:38:20,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 239 transitions, 2827 flow [2024-06-21 21:38:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:38:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:38:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 21:38:20,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-21 21:38:20,339 INFO L175 Difference]: Start difference. First operand has 108 places, 157 transitions, 1675 flow. Second operand 10 states and 179 transitions. [2024-06-21 21:38:20,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 239 transitions, 2827 flow [2024-06-21 21:38:20,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 239 transitions, 2684 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:20,424 INFO L231 Difference]: Finished difference. Result has 116 places, 181 transitions, 2084 flow [2024-06-21 21:38:20,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2084, PETRI_PLACES=116, PETRI_TRANSITIONS=181} [2024-06-21 21:38:20,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-21 21:38:20,425 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 181 transitions, 2084 flow [2024-06-21 21:38:20,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:20,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:20,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:38:20,426 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:20,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1184065389, now seen corresponding path program 3 times [2024-06-21 21:38:20,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:20,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712128112] [2024-06-21 21:38:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:22,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:22,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712128112] [2024-06-21 21:38:22,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712128112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:22,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:22,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:22,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971344039] [2024-06-21 21:38:22,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:22,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:22,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:22,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:22,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:22,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:22,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 181 transitions, 2084 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:22,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:22,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:22,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:23,765 INFO L124 PetriNetUnfolderBase]: 2387/3544 cut-off events. [2024-06-21 21:38:23,766 INFO L125 PetriNetUnfolderBase]: For 50641/50659 co-relation queries the response was YES. [2024-06-21 21:38:23,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23317 conditions, 3544 events. 2387/3544 cut-off events. For 50641/50659 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16781 event pairs, 603 based on Foata normal form. 14/3553 useless extension candidates. Maximal degree in co-relation 23263. Up to 3459 conditions per place. [2024-06-21 21:38:23,791 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 16 changer transitions 0/205 dead transitions. [2024-06-21 21:38:23,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 205 transitions, 2546 flow [2024-06-21 21:38:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:38:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:38:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 21:38:23,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-21 21:38:23,793 INFO L175 Difference]: Start difference. First operand has 116 places, 181 transitions, 2084 flow. Second operand 7 states and 110 transitions. [2024-06-21 21:38:23,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 205 transitions, 2546 flow [2024-06-21 21:38:23,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 205 transitions, 2365 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-21 21:38:23,878 INFO L231 Difference]: Finished difference. Result has 118 places, 181 transitions, 1943 flow [2024-06-21 21:38:23,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1943, PETRI_PLACES=118, PETRI_TRANSITIONS=181} [2024-06-21 21:38:23,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-21 21:38:23,878 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 181 transitions, 1943 flow [2024-06-21 21:38:23,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:23,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:23,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:23,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:38:23,879 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:23,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash -467741318, now seen corresponding path program 4 times [2024-06-21 21:38:23,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:23,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089643093] [2024-06-21 21:38:23,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:23,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:26,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:26,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089643093] [2024-06-21 21:38:26,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089643093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:26,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:26,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:38:26,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352301279] [2024-06-21 21:38:26,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:26,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:38:26,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:26,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:38:26,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:38:26,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:26,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 181 transitions, 1943 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:26,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:26,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:26,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:27,474 INFO L124 PetriNetUnfolderBase]: 2405/3570 cut-off events. [2024-06-21 21:38:27,474 INFO L125 PetriNetUnfolderBase]: For 53370/53388 co-relation queries the response was YES. [2024-06-21 21:38:27,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23301 conditions, 3570 events. 2405/3570 cut-off events. For 53370/53388 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16948 event pairs, 567 based on Foata normal form. 20/3585 useless extension candidates. Maximal degree in co-relation 23245. Up to 3366 conditions per place. [2024-06-21 21:38:27,496 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 191 selfloop transitions, 43 changer transitions 0/237 dead transitions. [2024-06-21 21:38:27,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 237 transitions, 2880 flow [2024-06-21 21:38:27,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:38:27,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:38:27,498 INFO L175 Difference]: Start difference. First operand has 118 places, 181 transitions, 1943 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:38:27,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 237 transitions, 2880 flow [2024-06-21 21:38:27,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 237 transitions, 2840 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:27,558 INFO L231 Difference]: Finished difference. Result has 124 places, 203 transitions, 2365 flow [2024-06-21 21:38:27,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1903, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2365, PETRI_PLACES=124, PETRI_TRANSITIONS=203} [2024-06-21 21:38:27,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-21 21:38:27,558 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 203 transitions, 2365 flow [2024-06-21 21:38:27,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:27,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:27,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:27,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:38:27,559 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 21:38:27,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:27,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1094440153, now seen corresponding path program 1 times [2024-06-21 21:38:27,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:27,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760407916] [2024-06-21 21:38:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:27,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:28,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:28,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760407916] [2024-06-21 21:38:28,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760407916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:28,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:28,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:38:28,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51302913] [2024-06-21 21:38:28,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:28,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:38:28,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:28,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:38:28,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:38:28,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:28,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 203 transitions, 2365 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:28,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:28,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:28,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:29,772 INFO L124 PetriNetUnfolderBase]: 2399/3560 cut-off events. [2024-06-21 21:38:29,772 INFO L125 PetriNetUnfolderBase]: For 58689/58689 co-relation queries the response was YES. [2024-06-21 21:38:29,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24593 conditions, 3560 events. 2399/3560 cut-off events. For 58689/58689 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16969 event pairs, 581 based on Foata normal form. 2/3559 useless extension candidates. Maximal degree in co-relation 24532. Up to 3540 conditions per place. [2024-06-21 21:38:29,793 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 202 selfloop transitions, 10 changer transitions 0/215 dead transitions. [2024-06-21 21:38:29,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 215 transitions, 2832 flow [2024-06-21 21:38:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:38:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:38:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2024-06-21 21:38:29,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37073170731707317 [2024-06-21 21:38:29,795 INFO L175 Difference]: Start difference. First operand has 124 places, 203 transitions, 2365 flow. Second operand 5 states and 76 transitions. [2024-06-21 21:38:29,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 215 transitions, 2832 flow [2024-06-21 21:38:29,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 215 transitions, 2710 flow, removed 60 selfloop flow, removed 1 redundant places. [2024-06-21 21:38:29,849 INFO L231 Difference]: Finished difference. Result has 129 places, 204 transitions, 2287 flow [2024-06-21 21:38:29,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2287, PETRI_PLACES=129, PETRI_TRANSITIONS=204} [2024-06-21 21:38:29,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-21 21:38:29,849 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 204 transitions, 2287 flow [2024-06-21 21:38:29,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:29,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:29,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:38:29,850 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:29,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:29,850 INFO L85 PathProgramCache]: Analyzing trace with hash -386003000, now seen corresponding path program 1 times [2024-06-21 21:38:29,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89840892] [2024-06-21 21:38:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:29,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:32,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:32,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89840892] [2024-06-21 21:38:32,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89840892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:32,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:32,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:32,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784844488] [2024-06-21 21:38:32,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:32,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:32,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:32,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:32,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 204 transitions, 2287 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:32,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:32,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:32,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:33,583 INFO L124 PetriNetUnfolderBase]: 2447/3640 cut-off events. [2024-06-21 21:38:33,583 INFO L125 PetriNetUnfolderBase]: For 65694/65756 co-relation queries the response was YES. [2024-06-21 21:38:33,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25237 conditions, 3640 events. 2447/3640 cut-off events. For 65694/65756 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 17507 event pairs, 462 based on Foata normal form. 38/3671 useless extension candidates. Maximal degree in co-relation 25172. Up to 3404 conditions per place. [2024-06-21 21:38:33,611 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 217 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-21 21:38:33,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 249 transitions, 3051 flow [2024-06-21 21:38:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:33,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:38:33,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 21:38:33,613 INFO L175 Difference]: Start difference. First operand has 129 places, 204 transitions, 2287 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:38:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 249 transitions, 3051 flow [2024-06-21 21:38:33,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 249 transitions, 3027 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 21:38:33,693 INFO L231 Difference]: Finished difference. Result has 134 places, 208 transitions, 2436 flow [2024-06-21 21:38:33,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2436, PETRI_PLACES=134, PETRI_TRANSITIONS=208} [2024-06-21 21:38:33,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-21 21:38:33,693 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 208 transitions, 2436 flow [2024-06-21 21:38:33,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:33,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:33,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:33,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:38:33,694 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:33,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:33,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1830592964, now seen corresponding path program 1 times [2024-06-21 21:38:33,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:33,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079695747] [2024-06-21 21:38:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:33,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079695747] [2024-06-21 21:38:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079695747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523539202] [2024-06-21 21:38:36,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:37,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:37,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 208 transitions, 2436 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:37,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:37,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:37,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:38,973 INFO L124 PetriNetUnfolderBase]: 2672/3956 cut-off events. [2024-06-21 21:38:38,973 INFO L125 PetriNetUnfolderBase]: For 77785/77847 co-relation queries the response was YES. [2024-06-21 21:38:38,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28048 conditions, 3956 events. 2672/3956 cut-off events. For 77785/77847 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19230 event pairs, 496 based on Foata normal form. 42/3991 useless extension candidates. Maximal degree in co-relation 27982. Up to 3254 conditions per place. [2024-06-21 21:38:39,004 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 233 selfloop transitions, 72 changer transitions 0/308 dead transitions. [2024-06-21 21:38:39,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 308 transitions, 3911 flow [2024-06-21 21:38:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:38:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:38:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 21:38:39,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-21 21:38:39,005 INFO L175 Difference]: Start difference. First operand has 134 places, 208 transitions, 2436 flow. Second operand 11 states and 208 transitions. [2024-06-21 21:38:39,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 308 transitions, 3911 flow [2024-06-21 21:38:39,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 308 transitions, 3819 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 21:38:39,107 INFO L231 Difference]: Finished difference. Result has 144 places, 230 transitions, 2869 flow [2024-06-21 21:38:39,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2344, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2869, PETRI_PLACES=144, PETRI_TRANSITIONS=230} [2024-06-21 21:38:39,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-21 21:38:39,107 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 230 transitions, 2869 flow [2024-06-21 21:38:39,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:39,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:39,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:38:39,108 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:39,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1830592840, now seen corresponding path program 2 times [2024-06-21 21:38:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:39,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539766359] [2024-06-21 21:38:39,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:39,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:42,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539766359] [2024-06-21 21:38:42,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539766359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:42,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:42,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:42,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179116018] [2024-06-21 21:38:42,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:42,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:42,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:42,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:42,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:42,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 230 transitions, 2869 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:42,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:42,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:42,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:44,184 INFO L124 PetriNetUnfolderBase]: 2692/3988 cut-off events. [2024-06-21 21:38:44,185 INFO L125 PetriNetUnfolderBase]: For 87918/87980 co-relation queries the response was YES. [2024-06-21 21:38:44,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29726 conditions, 3988 events. 2692/3988 cut-off events. For 87918/87980 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19422 event pairs, 592 based on Foata normal form. 38/4019 useless extension candidates. Maximal degree in co-relation 29655. Up to 3808 conditions per place. [2024-06-21 21:38:44,288 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 32 changer transitions 0/270 dead transitions. [2024-06-21 21:38:44,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 270 transitions, 3535 flow [2024-06-21 21:38:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 21:38:44,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 21:38:44,290 INFO L175 Difference]: Start difference. First operand has 144 places, 230 transitions, 2869 flow. Second operand 8 states and 135 transitions. [2024-06-21 21:38:44,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 270 transitions, 3535 flow [2024-06-21 21:38:44,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 270 transitions, 3388 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 21:38:44,397 INFO L231 Difference]: Finished difference. Result has 147 places, 232 transitions, 2837 flow [2024-06-21 21:38:44,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2837, PETRI_PLACES=147, PETRI_TRANSITIONS=232} [2024-06-21 21:38:44,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-21 21:38:44,397 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 232 transitions, 2837 flow [2024-06-21 21:38:44,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:44,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:44,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:44,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:38:44,398 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:44,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:44,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1833394124, now seen corresponding path program 2 times [2024-06-21 21:38:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:44,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027904671] [2024-06-21 21:38:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:44,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:47,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:47,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027904671] [2024-06-21 21:38:47,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027904671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:47,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:47,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070941090] [2024-06-21 21:38:47,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:47,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:47,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:47,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:47,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:47,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:47,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 232 transitions, 2837 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:47,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:47,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:47,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:49,260 INFO L124 PetriNetUnfolderBase]: 2746/4064 cut-off events. [2024-06-21 21:38:49,260 INFO L125 PetriNetUnfolderBase]: For 92872/92893 co-relation queries the response was YES. [2024-06-21 21:38:49,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30238 conditions, 4064 events. 2746/4064 cut-off events. For 92872/92893 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19813 event pairs, 538 based on Foata normal form. 22/4081 useless extension candidates. Maximal degree in co-relation 30165. Up to 3833 conditions per place. [2024-06-21 21:38:49,294 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 243 selfloop transitions, 35 changer transitions 0/281 dead transitions. [2024-06-21 21:38:49,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 281 transitions, 3756 flow [2024-06-21 21:38:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:38:49,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 21:38:49,296 INFO L175 Difference]: Start difference. First operand has 147 places, 232 transitions, 2837 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:38:49,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 281 transitions, 3756 flow [2024-06-21 21:38:49,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 281 transitions, 3663 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:49,412 INFO L231 Difference]: Finished difference. Result has 150 places, 236 transitions, 2911 flow [2024-06-21 21:38:49,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2911, PETRI_PLACES=150, PETRI_TRANSITIONS=236} [2024-06-21 21:38:49,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-21 21:38:49,413 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 236 transitions, 2911 flow [2024-06-21 21:38:49,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:49,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:49,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:49,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:38:49,414 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:49,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1833389350, now seen corresponding path program 3 times [2024-06-21 21:38:49,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:49,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235415175] [2024-06-21 21:38:49,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:49,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:52,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:52,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235415175] [2024-06-21 21:38:52,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235415175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:52,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:52,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:52,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387122329] [2024-06-21 21:38:52,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:52,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:52,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:52,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:52,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 236 transitions, 2911 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:52,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:52,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:52,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:54,110 INFO L124 PetriNetUnfolderBase]: 2738/4052 cut-off events. [2024-06-21 21:38:54,110 INFO L125 PetriNetUnfolderBase]: For 98356/98377 co-relation queries the response was YES. [2024-06-21 21:38:54,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30713 conditions, 4052 events. 2738/4052 cut-off events. For 98356/98377 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19695 event pairs, 595 based on Foata normal form. 18/4065 useless extension candidates. Maximal degree in co-relation 30639. Up to 3954 conditions per place. [2024-06-21 21:38:54,142 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 18 changer transitions 0/272 dead transitions. [2024-06-21 21:38:54,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 272 transitions, 3593 flow [2024-06-21 21:38:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:38:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:38:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 21:38:54,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 21:38:54,144 INFO L175 Difference]: Start difference. First operand has 150 places, 236 transitions, 2911 flow. Second operand 8 states and 127 transitions. [2024-06-21 21:38:54,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 272 transitions, 3593 flow [2024-06-21 21:38:54,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 272 transitions, 3462 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 21:38:54,270 INFO L231 Difference]: Finished difference. Result has 151 places, 238 transitions, 2889 flow [2024-06-21 21:38:54,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2780, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2889, PETRI_PLACES=151, PETRI_TRANSITIONS=238} [2024-06-21 21:38:54,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-21 21:38:54,271 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 238 transitions, 2889 flow [2024-06-21 21:38:54,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:54,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:54,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:54,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:38:54,272 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:54,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1833389474, now seen corresponding path program 3 times [2024-06-21 21:38:54,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:54,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562555969] [2024-06-21 21:38:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:38:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:38:57,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:38:57,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562555969] [2024-06-21 21:38:57,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562555969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:38:57,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:38:57,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:38:57,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057006186] [2024-06-21 21:38:57,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:38:57,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:38:57,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:38:57,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:38:57,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:38:57,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:38:57,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 238 transitions, 2889 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:57,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:38:57,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:38:57,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:38:58,839 INFO L124 PetriNetUnfolderBase]: 2840/4198 cut-off events. [2024-06-21 21:38:58,839 INFO L125 PetriNetUnfolderBase]: For 108707/108769 co-relation queries the response was YES. [2024-06-21 21:38:58,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31940 conditions, 4198 events. 2840/4198 cut-off events. For 108707/108769 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 20594 event pairs, 524 based on Foata normal form. 42/4233 useless extension candidates. Maximal degree in co-relation 31865. Up to 3616 conditions per place. [2024-06-21 21:38:58,873 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 234 selfloop transitions, 65 changer transitions 0/302 dead transitions. [2024-06-21 21:38:58,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 302 transitions, 4062 flow [2024-06-21 21:38:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:38:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:38:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:38:58,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 21:38:58,875 INFO L175 Difference]: Start difference. First operand has 151 places, 238 transitions, 2889 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:38:58,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 302 transitions, 4062 flow [2024-06-21 21:38:59,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 302 transitions, 3971 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:38:59,033 INFO L231 Difference]: Finished difference. Result has 155 places, 246 transitions, 3123 flow [2024-06-21 21:38:59,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3123, PETRI_PLACES=155, PETRI_TRANSITIONS=246} [2024-06-21 21:38:59,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 21:38:59,033 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 246 transitions, 3123 flow [2024-06-21 21:38:59,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:38:59,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:38:59,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:38:59,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:38:59,034 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:38:59,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:38:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1766662680, now seen corresponding path program 1 times [2024-06-21 21:38:59,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:38:59,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453334977] [2024-06-21 21:38:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:38:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:38:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:01,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:01,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453334977] [2024-06-21 21:39:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453334977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:01,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:01,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:01,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489823133] [2024-06-21 21:39:01,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:01,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:01,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:01,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:01,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:01,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:01,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 246 transitions, 3123 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:01,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:01,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:01,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:03,606 INFO L124 PetriNetUnfolderBase]: 2863/4229 cut-off events. [2024-06-21 21:39:03,606 INFO L125 PetriNetUnfolderBase]: For 117916/117937 co-relation queries the response was YES. [2024-06-21 21:39:03,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33198 conditions, 4229 events. 2863/4229 cut-off events. For 117916/117937 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 20700 event pairs, 572 based on Foata normal form. 20/4244 useless extension candidates. Maximal degree in co-relation 33121. Up to 3916 conditions per place. [2024-06-21 21:39:03,638 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 228 selfloop transitions, 56 changer transitions 0/287 dead transitions. [2024-06-21 21:39:03,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 287 transitions, 4011 flow [2024-06-21 21:39:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:03,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:03,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:39:03,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-21 21:39:03,640 INFO L175 Difference]: Start difference. First operand has 155 places, 246 transitions, 3123 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:39:03,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 287 transitions, 4011 flow [2024-06-21 21:39:03,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 287 transitions, 3830 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:03,787 INFO L231 Difference]: Finished difference. Result has 159 places, 253 transitions, 3189 flow [2024-06-21 21:39:03,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3189, PETRI_PLACES=159, PETRI_TRANSITIONS=253} [2024-06-21 21:39:03,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-21 21:39:03,788 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 253 transitions, 3189 flow [2024-06-21 21:39:03,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:03,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:03,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:03,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:39:03,789 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:03,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:03,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1948865218, now seen corresponding path program 1 times [2024-06-21 21:39:03,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:03,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100355231] [2024-06-21 21:39:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:03,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:06,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:06,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100355231] [2024-06-21 21:39:06,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100355231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:06,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:06,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:06,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294572131] [2024-06-21 21:39:06,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:06,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:06,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:06,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:06,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:06,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:06,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 253 transitions, 3189 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:06,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:06,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:06,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:08,550 INFO L124 PetriNetUnfolderBase]: 2943/4357 cut-off events. [2024-06-21 21:39:08,550 INFO L125 PetriNetUnfolderBase]: For 127312/127333 co-relation queries the response was YES. [2024-06-21 21:39:08,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34143 conditions, 4357 events. 2943/4357 cut-off events. For 127312/127333 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21602 event pairs, 520 based on Foata normal form. 30/4382 useless extension candidates. Maximal degree in co-relation 34064. Up to 3927 conditions per place. [2024-06-21 21:39:08,586 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 49 changer transitions 0/293 dead transitions. [2024-06-21 21:39:08,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 293 transitions, 4091 flow [2024-06-21 21:39:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:39:08,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 21:39:08,587 INFO L175 Difference]: Start difference. First operand has 159 places, 253 transitions, 3189 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:39:08,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 293 transitions, 4091 flow [2024-06-21 21:39:08,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 293 transitions, 3939 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 21:39:08,712 INFO L231 Difference]: Finished difference. Result has 160 places, 255 transitions, 3213 flow [2024-06-21 21:39:08,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3041, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3213, PETRI_PLACES=160, PETRI_TRANSITIONS=255} [2024-06-21 21:39:08,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-21 21:39:08,713 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 255 transitions, 3213 flow [2024-06-21 21:39:08,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:08,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:08,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:08,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:39:08,714 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:08,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1946479690, now seen corresponding path program 4 times [2024-06-21 21:39:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:08,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804412018] [2024-06-21 21:39:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:08,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:11,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:11,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804412018] [2024-06-21 21:39:11,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804412018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:11,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:11,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:11,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150088629] [2024-06-21 21:39:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:11,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:11,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:11,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:11,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:11,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 255 transitions, 3213 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:11,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:11,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:11,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:13,922 INFO L124 PetriNetUnfolderBase]: 3585/5287 cut-off events. [2024-06-21 21:39:13,923 INFO L125 PetriNetUnfolderBase]: For 149973/149985 co-relation queries the response was YES. [2024-06-21 21:39:13,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42174 conditions, 5287 events. 3585/5287 cut-off events. For 149973/149985 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26851 event pairs, 523 based on Foata normal form. 21/5304 useless extension candidates. Maximal degree in co-relation 42095. Up to 4127 conditions per place. [2024-06-21 21:39:13,967 INFO L140 encePairwiseOnDemand]: 24/41 looper letters, 288 selfloop transitions, 153 changer transitions 0/444 dead transitions. [2024-06-21 21:39:13,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 444 transitions, 6214 flow [2024-06-21 21:39:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 21:39:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 21:39:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 262 transitions. [2024-06-21 21:39:13,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42601626016260163 [2024-06-21 21:39:13,968 INFO L175 Difference]: Start difference. First operand has 160 places, 255 transitions, 3213 flow. Second operand 15 states and 262 transitions. [2024-06-21 21:39:13,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 444 transitions, 6214 flow [2024-06-21 21:39:14,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 444 transitions, 6012 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 21:39:14,172 INFO L231 Difference]: Finished difference. Result has 177 places, 341 transitions, 4902 flow [2024-06-21 21:39:14,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3085, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4902, PETRI_PLACES=177, PETRI_TRANSITIONS=341} [2024-06-21 21:39:14,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 21:39:14,173 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 341 transitions, 4902 flow [2024-06-21 21:39:14,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:14,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:14,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:14,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:39:14,174 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:14,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash -875522058, now seen corresponding path program 5 times [2024-06-21 21:39:14,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:14,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979236133] [2024-06-21 21:39:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:14,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:16,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:16,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979236133] [2024-06-21 21:39:16,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979236133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:16,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:16,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:16,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772415067] [2024-06-21 21:39:16,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:16,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:16,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:16,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:16,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 341 transitions, 4902 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:16,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:16,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:16,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:19,214 INFO L124 PetriNetUnfolderBase]: 4394/6437 cut-off events. [2024-06-21 21:39:19,214 INFO L125 PetriNetUnfolderBase]: For 190045/190069 co-relation queries the response was YES. [2024-06-21 21:39:19,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55562 conditions, 6437 events. 4394/6437 cut-off events. For 190045/190069 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33428 event pairs, 611 based on Foata normal form. 26/6456 useless extension candidates. Maximal degree in co-relation 55473. Up to 5611 conditions per place. [2024-06-21 21:39:19,277 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 403 selfloop transitions, 139 changer transitions 0/545 dead transitions. [2024-06-21 21:39:19,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 545 transitions, 8723 flow [2024-06-21 21:39:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:39:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:39:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 214 transitions. [2024-06-21 21:39:19,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40150093808630394 [2024-06-21 21:39:19,278 INFO L175 Difference]: Start difference. First operand has 177 places, 341 transitions, 4902 flow. Second operand 13 states and 214 transitions. [2024-06-21 21:39:19,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 545 transitions, 8723 flow [2024-06-21 21:39:19,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 545 transitions, 8528 flow, removed 94 selfloop flow, removed 2 redundant places. [2024-06-21 21:39:19,792 INFO L231 Difference]: Finished difference. Result has 196 places, 453 transitions, 7242 flow [2024-06-21 21:39:19,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4752, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7242, PETRI_PLACES=196, PETRI_TRANSITIONS=453} [2024-06-21 21:39:19,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-21 21:39:19,794 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 453 transitions, 7242 flow [2024-06-21 21:39:19,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:19,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:19,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:19,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:39:19,794 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:19,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash -267854870, now seen corresponding path program 4 times [2024-06-21 21:39:19,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:19,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907539486] [2024-06-21 21:39:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:19,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:22,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:22,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907539486] [2024-06-21 21:39:22,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907539486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:22,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:22,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:22,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482114694] [2024-06-21 21:39:22,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:22,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:22,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:22,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:22,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:22,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:22,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 453 transitions, 7242 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:22,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:22,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:22,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:24,718 INFO L124 PetriNetUnfolderBase]: 4498/6592 cut-off events. [2024-06-21 21:39:24,718 INFO L125 PetriNetUnfolderBase]: For 208783/208804 co-relation queries the response was YES. [2024-06-21 21:39:24,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59617 conditions, 6592 events. 4498/6592 cut-off events. For 208783/208804 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34401 event pairs, 616 based on Foata normal form. 18/6602 useless extension candidates. Maximal degree in co-relation 59518. Up to 5723 conditions per place. [2024-06-21 21:39:24,786 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 366 selfloop transitions, 146 changer transitions 0/515 dead transitions. [2024-06-21 21:39:24,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 515 transitions, 8828 flow [2024-06-21 21:39:24,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:39:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:39:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:39:24,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 21:39:24,788 INFO L175 Difference]: Start difference. First operand has 196 places, 453 transitions, 7242 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:39:24,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 515 transitions, 8828 flow [2024-06-21 21:39:25,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 515 transitions, 8688 flow, removed 69 selfloop flow, removed 1 redundant places. [2024-06-21 21:39:25,308 INFO L231 Difference]: Finished difference. Result has 205 places, 472 transitions, 7870 flow [2024-06-21 21:39:25,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7870, PETRI_PLACES=205, PETRI_TRANSITIONS=472} [2024-06-21 21:39:25,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 21:39:25,309 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 472 transitions, 7870 flow [2024-06-21 21:39:25,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:25,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:25,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:25,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:39:25,310 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:25,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:25,310 INFO L85 PathProgramCache]: Analyzing trace with hash -705869364, now seen corresponding path program 6 times [2024-06-21 21:39:25,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:25,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492049459] [2024-06-21 21:39:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:25,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:27,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:27,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492049459] [2024-06-21 21:39:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492049459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:27,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594998656] [2024-06-21 21:39:27,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:27,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:27,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:28,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:28,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 472 transitions, 7870 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:28,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:28,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:28,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:30,523 INFO L124 PetriNetUnfolderBase]: 4816/7047 cut-off events. [2024-06-21 21:39:30,524 INFO L125 PetriNetUnfolderBase]: For 243645/243666 co-relation queries the response was YES. [2024-06-21 21:39:30,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66135 conditions, 7047 events. 4816/7047 cut-off events. For 243645/243666 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 37032 event pairs, 520 based on Foata normal form. 24/7063 useless extension candidates. Maximal degree in co-relation 66032. Up to 4221 conditions per place. [2024-06-21 21:39:30,596 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 302 selfloop transitions, 334 changer transitions 0/639 dead transitions. [2024-06-21 21:39:30,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 639 transitions, 11719 flow [2024-06-21 21:39:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:30,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-21 21:39:30,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43680709534368073 [2024-06-21 21:39:30,598 INFO L175 Difference]: Start difference. First operand has 205 places, 472 transitions, 7870 flow. Second operand 11 states and 197 transitions. [2024-06-21 21:39:30,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 639 transitions, 11719 flow [2024-06-21 21:39:31,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 639 transitions, 11641 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:31,190 INFO L231 Difference]: Finished difference. Result has 213 places, 572 transitions, 10773 flow [2024-06-21 21:39:31,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7792, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10773, PETRI_PLACES=213, PETRI_TRANSITIONS=572} [2024-06-21 21:39:31,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-21 21:39:31,191 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 572 transitions, 10773 flow [2024-06-21 21:39:31,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:31,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:31,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:31,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:39:31,191 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:31,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash -705691734, now seen corresponding path program 7 times [2024-06-21 21:39:31,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:31,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831122657] [2024-06-21 21:39:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:31,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:33,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:33,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831122657] [2024-06-21 21:39:33,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831122657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:33,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:33,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:33,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860709598] [2024-06-21 21:39:33,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:33,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:33,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:33,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:33,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:33,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:33,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 572 transitions, 10773 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:33,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:33,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:33,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:36,662 INFO L124 PetriNetUnfolderBase]: 4870/7125 cut-off events. [2024-06-21 21:39:36,662 INFO L125 PetriNetUnfolderBase]: For 278990/279011 co-relation queries the response was YES. [2024-06-21 21:39:36,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72776 conditions, 7125 events. 4870/7125 cut-off events. For 278990/279011 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 37496 event pairs, 650 based on Foata normal form. 22/7139 useless extension candidates. Maximal degree in co-relation 72668. Up to 6513 conditions per place. [2024-06-21 21:39:36,735 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 506 selfloop transitions, 104 changer transitions 0/613 dead transitions. [2024-06-21 21:39:36,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 613 transitions, 12348 flow [2024-06-21 21:39:36,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:39:36,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:39:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-21 21:39:36,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3829268292682927 [2024-06-21 21:39:36,737 INFO L175 Difference]: Start difference. First operand has 213 places, 572 transitions, 10773 flow. Second operand 10 states and 157 transitions. [2024-06-21 21:39:36,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 613 transitions, 12348 flow [2024-06-21 21:39:37,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 613 transitions, 12087 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-21 21:39:37,423 INFO L231 Difference]: Finished difference. Result has 218 places, 577 transitions, 10859 flow [2024-06-21 21:39:37,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10512, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10859, PETRI_PLACES=218, PETRI_TRANSITIONS=577} [2024-06-21 21:39:37,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 21:39:37,424 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 577 transitions, 10859 flow [2024-06-21 21:39:37,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:37,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:37,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:37,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:39:37,425 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:37,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1843151216, now seen corresponding path program 8 times [2024-06-21 21:39:37,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:37,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454938450] [2024-06-21 21:39:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:37,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:40,570 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 21:39:40,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454938450] [2024-06-21 21:39:40,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454938450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:40,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:40,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038772132] [2024-06-21 21:39:40,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:40,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:40,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:40,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:40,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:40,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 577 transitions, 10859 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:40,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:40,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:40,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:43,422 INFO L124 PetriNetUnfolderBase]: 5293/7742 cut-off events. [2024-06-21 21:39:43,423 INFO L125 PetriNetUnfolderBase]: For 316951/316972 co-relation queries the response was YES. [2024-06-21 21:39:43,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80182 conditions, 7742 events. 5293/7742 cut-off events. For 316951/316972 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 41356 event pairs, 636 based on Foata normal form. 22/7756 useless extension candidates. Maximal degree in co-relation 80072. Up to 6346 conditions per place. [2024-06-21 21:39:43,518 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 447 selfloop transitions, 259 changer transitions 0/709 dead transitions. [2024-06-21 21:39:43,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 709 transitions, 14075 flow [2024-06-21 21:39:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:39:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:39:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-21 21:39:43,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-21 21:39:43,519 INFO L175 Difference]: Start difference. First operand has 218 places, 577 transitions, 10859 flow. Second operand 11 states and 199 transitions. [2024-06-21 21:39:43,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 709 transitions, 14075 flow [2024-06-21 21:39:44,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 709 transitions, 13859 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 21:39:44,479 INFO L231 Difference]: Finished difference. Result has 227 places, 639 transitions, 12759 flow [2024-06-21 21:39:44,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10649, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12759, PETRI_PLACES=227, PETRI_TRANSITIONS=639} [2024-06-21 21:39:44,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-21 21:39:44,480 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 639 transitions, 12759 flow [2024-06-21 21:39:44,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:44,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:44,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:44,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:39:44,481 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:44,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:44,481 INFO L85 PathProgramCache]: Analyzing trace with hash -703207880, now seen corresponding path program 2 times [2024-06-21 21:39:44,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:44,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865525807] [2024-06-21 21:39:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:47,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:47,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:47,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865525807] [2024-06-21 21:39:47,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865525807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:47,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:47,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:47,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125437367] [2024-06-21 21:39:47,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:47,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:47,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:47,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:47,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:47,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:47,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 639 transitions, 12759 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:47,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:47,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:47,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:50,350 INFO L124 PetriNetUnfolderBase]: 5445/7978 cut-off events. [2024-06-21 21:39:50,350 INFO L125 PetriNetUnfolderBase]: For 367476/367497 co-relation queries the response was YES. [2024-06-21 21:39:50,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85805 conditions, 7978 events. 5445/7978 cut-off events. For 367476/367497 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 43054 event pairs, 624 based on Foata normal form. 30/8000 useless extension candidates. Maximal degree in co-relation 85690. Up to 6592 conditions per place. [2024-06-21 21:39:50,453 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 521 selfloop transitions, 171 changer transitions 0/695 dead transitions. [2024-06-21 21:39:50,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 695 transitions, 14945 flow [2024-06-21 21:39:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:39:50,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 21:39:50,454 INFO L175 Difference]: Start difference. First operand has 227 places, 639 transitions, 12759 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:39:50,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 695 transitions, 14945 flow [2024-06-21 21:39:51,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 695 transitions, 14730 flow, removed 76 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:51,704 INFO L231 Difference]: Finished difference. Result has 231 places, 643 transitions, 13065 flow [2024-06-21 21:39:51,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12544, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13065, PETRI_PLACES=231, PETRI_TRANSITIONS=643} [2024-06-21 21:39:51,705 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-21 21:39:51,705 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 643 transitions, 13065 flow [2024-06-21 21:39:51,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:51,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:51,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:51,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:39:51,705 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:51,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1606796180, now seen corresponding path program 2 times [2024-06-21 21:39:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:51,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516667235] [2024-06-21 21:39:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:39:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:39:54,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:39:54,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516667235] [2024-06-21 21:39:54,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516667235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:39:54,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:39:54,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:39:54,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53348204] [2024-06-21 21:39:54,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:39:54,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:39:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:39:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:39:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:39:54,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:39:54,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 643 transitions, 13065 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:54,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:39:54,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:39:54,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:39:57,051 INFO L124 PetriNetUnfolderBase]: 5468/8011 cut-off events. [2024-06-21 21:39:57,051 INFO L125 PetriNetUnfolderBase]: For 381944/381965 co-relation queries the response was YES. [2024-06-21 21:39:57,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87256 conditions, 8011 events. 5468/8011 cut-off events. For 381944/381965 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 43324 event pairs, 711 based on Foata normal form. 20/8023 useless extension candidates. Maximal degree in co-relation 87139. Up to 7083 conditions per place. [2024-06-21 21:39:57,154 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 510 selfloop transitions, 179 changer transitions 0/692 dead transitions. [2024-06-21 21:39:57,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 692 transitions, 15051 flow [2024-06-21 21:39:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:39:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:39:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:39:57,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 21:39:57,155 INFO L175 Difference]: Start difference. First operand has 231 places, 643 transitions, 13065 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:39:57,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 692 transitions, 15051 flow [2024-06-21 21:39:58,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 692 transitions, 14789 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 21:39:58,499 INFO L231 Difference]: Finished difference. Result has 235 places, 650 transitions, 13382 flow [2024-06-21 21:39:58,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12803, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13382, PETRI_PLACES=235, PETRI_TRANSITIONS=650} [2024-06-21 21:39:58,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-21 21:39:58,500 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 650 transitions, 13382 flow [2024-06-21 21:39:58,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:39:58,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:39:58,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:39:58,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:39:58,501 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:39:58,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:39:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1606795932, now seen corresponding path program 3 times [2024-06-21 21:39:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:39:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941587354] [2024-06-21 21:39:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:39:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:39:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:02,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:02,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941587354] [2024-06-21 21:40:02,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941587354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:02,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:02,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:02,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390710280] [2024-06-21 21:40:02,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:02,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:02,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:02,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:02,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:40:02,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 650 transitions, 13382 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:02,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:02,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:40:02,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:05,210 INFO L124 PetriNetUnfolderBase]: 5520/8095 cut-off events. [2024-06-21 21:40:05,210 INFO L125 PetriNetUnfolderBase]: For 404290/404311 co-relation queries the response was YES. [2024-06-21 21:40:05,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89313 conditions, 8095 events. 5520/8095 cut-off events. For 404290/404311 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 43962 event pairs, 724 based on Foata normal form. 30/8117 useless extension candidates. Maximal degree in co-relation 89194. Up to 7144 conditions per place. [2024-06-21 21:40:05,304 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 526 selfloop transitions, 168 changer transitions 0/697 dead transitions. [2024-06-21 21:40:05,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 697 transitions, 15268 flow [2024-06-21 21:40:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:40:05,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:40:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:40:05,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 21:40:05,306 INFO L175 Difference]: Start difference. First operand has 235 places, 650 transitions, 13382 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:40:05,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 697 transitions, 15268 flow [2024-06-21 21:40:06,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 697 transitions, 14946 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 21:40:06,456 INFO L231 Difference]: Finished difference. Result has 239 places, 651 transitions, 13436 flow [2024-06-21 21:40:06,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13060, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13436, PETRI_PLACES=239, PETRI_TRANSITIONS=651} [2024-06-21 21:40:06,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-21 21:40:06,457 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 651 transitions, 13436 flow [2024-06-21 21:40:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:06,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:06,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:06,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:40:06,458 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:06,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:06,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1615077086, now seen corresponding path program 9 times [2024-06-21 21:40:06,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:06,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667286762] [2024-06-21 21:40:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:06,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:09,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:09,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667286762] [2024-06-21 21:40:09,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667286762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:09,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:09,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:09,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796863498] [2024-06-21 21:40:09,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:09,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:09,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:09,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:40:09,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 651 transitions, 13436 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:09,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:09,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:40:09,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:12,315 INFO L124 PetriNetUnfolderBase]: 5618/8234 cut-off events. [2024-06-21 21:40:12,315 INFO L125 PetriNetUnfolderBase]: For 422363/422384 co-relation queries the response was YES. [2024-06-21 21:40:12,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91152 conditions, 8234 events. 5618/8234 cut-off events. For 422363/422384 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 44829 event pairs, 686 based on Foata normal form. 22/8248 useless extension candidates. Maximal degree in co-relation 91032. Up to 7299 conditions per place. [2024-06-21 21:40:12,415 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 549 selfloop transitions, 210 changer transitions 0/762 dead transitions. [2024-06-21 21:40:12,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 762 transitions, 16989 flow [2024-06-21 21:40:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:40:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:40:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 202 transitions. [2024-06-21 21:40:12,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3789868667917448 [2024-06-21 21:40:12,416 INFO L175 Difference]: Start difference. First operand has 239 places, 651 transitions, 13436 flow. Second operand 13 states and 202 transitions. [2024-06-21 21:40:12,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 762 transitions, 16989 flow [2024-06-21 21:40:13,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 762 transitions, 16528 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:40:13,718 INFO L231 Difference]: Finished difference. Result has 250 places, 711 transitions, 15051 flow [2024-06-21 21:40:13,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13062, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=15051, PETRI_PLACES=250, PETRI_TRANSITIONS=711} [2024-06-21 21:40:13,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-21 21:40:13,719 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 711 transitions, 15051 flow [2024-06-21 21:40:13,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:13,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:13,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:13,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:40:13,720 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:13,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1948685294, now seen corresponding path program 10 times [2024-06-21 21:40:13,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:13,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757375525] [2024-06-21 21:40:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:13,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:16,274 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 21:40:16,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757375525] [2024-06-21 21:40:16,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757375525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:16,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:16,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:40:16,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824203855] [2024-06-21 21:40:16,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:16,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:40:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:40:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:40:16,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:40:16,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 711 transitions, 15051 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:16,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:16,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:40:16,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:19,591 INFO L124 PetriNetUnfolderBase]: 5650/8280 cut-off events. [2024-06-21 21:40:19,591 INFO L125 PetriNetUnfolderBase]: For 434229/434250 co-relation queries the response was YES. [2024-06-21 21:40:19,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92960 conditions, 8280 events. 5650/8280 cut-off events. For 434229/434250 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 45056 event pairs, 646 based on Foata normal form. 24/8296 useless extension candidates. Maximal degree in co-relation 92835. Up to 5399 conditions per place. [2024-06-21 21:40:19,698 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 369 selfloop transitions, 410 changer transitions 0/782 dead transitions. [2024-06-21 21:40:19,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 782 transitions, 17535 flow [2024-06-21 21:40:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:40:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:40:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-21 21:40:19,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43015521064301554 [2024-06-21 21:40:19,700 INFO L175 Difference]: Start difference. First operand has 250 places, 711 transitions, 15051 flow. Second operand 11 states and 194 transitions. [2024-06-21 21:40:19,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 782 transitions, 17535 flow [2024-06-21 21:40:21,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 782 transitions, 17348 flow, removed 80 selfloop flow, removed 3 redundant places. [2024-06-21 21:40:21,220 INFO L231 Difference]: Finished difference. Result has 259 places, 719 transitions, 16088 flow [2024-06-21 21:40:21,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14864, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16088, PETRI_PLACES=259, PETRI_TRANSITIONS=719} [2024-06-21 21:40:21,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-21 21:40:21,221 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 719 transitions, 16088 flow [2024-06-21 21:40:21,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:21,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:21,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:21,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:40:21,222 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:21,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1704668527, now seen corresponding path program 1 times [2024-06-21 21:40:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:21,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804715764] [2024-06-21 21:40:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:21,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:26,640 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 21:40:26,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:26,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804715764] [2024-06-21 21:40:26,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804715764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:26,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:26,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491470909] [2024-06-21 21:40:26,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:26,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:26,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:26,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:40:26,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 719 transitions, 16088 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:26,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:26,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:40:26,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:30,629 INFO L124 PetriNetUnfolderBase]: 6780/10082 cut-off events. [2024-06-21 21:40:30,629 INFO L125 PetriNetUnfolderBase]: For 628361/628528 co-relation queries the response was YES. [2024-06-21 21:40:30,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115042 conditions, 10082 events. 6780/10082 cut-off events. For 628361/628528 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 57853 event pairs, 999 based on Foata normal form. 149/10217 useless extension candidates. Maximal degree in co-relation 114915. Up to 5871 conditions per place. [2024-06-21 21:40:30,748 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 640 selfloop transitions, 179 changer transitions 0/822 dead transitions. [2024-06-21 21:40:30,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 822 transitions, 19243 flow [2024-06-21 21:40:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 21:40:30,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-21 21:40:30,750 INFO L175 Difference]: Start difference. First operand has 259 places, 719 transitions, 16088 flow. Second operand 10 states and 204 transitions. [2024-06-21 21:40:30,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 822 transitions, 19243 flow [2024-06-21 21:40:32,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 822 transitions, 18358 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-21 21:40:32,556 INFO L231 Difference]: Finished difference. Result has 263 places, 726 transitions, 15861 flow [2024-06-21 21:40:32,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15229, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15861, PETRI_PLACES=263, PETRI_TRANSITIONS=726} [2024-06-21 21:40:32,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-21 21:40:32,559 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 726 transitions, 15861 flow [2024-06-21 21:40:32,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:32,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:32,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:32,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:40:32,559 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:32,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:32,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1706542477, now seen corresponding path program 2 times [2024-06-21 21:40:32,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:32,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984948730] [2024-06-21 21:40:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:32,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:35,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:35,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984948730] [2024-06-21 21:40:35,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984948730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:35,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:35,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:35,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023526424] [2024-06-21 21:40:35,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:35,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:35,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:35,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:35,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:35,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:40:35,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 726 transitions, 15861 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:35,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:35,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:40:35,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:40,638 INFO L124 PetriNetUnfolderBase]: 7493/11229 cut-off events. [2024-06-21 21:40:40,638 INFO L125 PetriNetUnfolderBase]: For 711981/712148 co-relation queries the response was YES. [2024-06-21 21:40:40,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125902 conditions, 11229 events. 7493/11229 cut-off events. For 711981/712148 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 66539 event pairs, 1489 based on Foata normal form. 141/11356 useless extension candidates. Maximal degree in co-relation 125772. Up to 7431 conditions per place. [2024-06-21 21:40:40,770 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 431 selfloop transitions, 386 changer transitions 0/820 dead transitions. [2024-06-21 21:40:40,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 820 transitions, 19063 flow [2024-06-21 21:40:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:40,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 21:40:40,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-21 21:40:40,772 INFO L175 Difference]: Start difference. First operand has 263 places, 726 transitions, 15861 flow. Second operand 10 states and 200 transitions. [2024-06-21 21:40:40,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 820 transitions, 19063 flow [2024-06-21 21:40:42,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 820 transitions, 18737 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 21:40:42,694 INFO L231 Difference]: Finished difference. Result has 272 places, 738 transitions, 17082 flow [2024-06-21 21:40:42,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15535, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17082, PETRI_PLACES=272, PETRI_TRANSITIONS=738} [2024-06-21 21:40:42,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-21 21:40:42,695 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 738 transitions, 17082 flow [2024-06-21 21:40:42,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:42,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:42,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:42,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:40:42,696 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:42,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1789663087, now seen corresponding path program 3 times [2024-06-21 21:40:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:42,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922836680] [2024-06-21 21:40:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:42,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:46,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:46,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922836680] [2024-06-21 21:40:46,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922836680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:46,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:46,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459061938] [2024-06-21 21:40:46,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:46,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:46,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:46,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:46,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:46,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:40:46,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 738 transitions, 17082 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:46,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:46,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:40:46,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:40:51,350 INFO L124 PetriNetUnfolderBase]: 7643/11491 cut-off events. [2024-06-21 21:40:51,350 INFO L125 PetriNetUnfolderBase]: For 767497/767667 co-relation queries the response was YES. [2024-06-21 21:40:51,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132003 conditions, 11491 events. 7643/11491 cut-off events. For 767497/767667 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 68587 event pairs, 1728 based on Foata normal form. 153/11630 useless extension candidates. Maximal degree in co-relation 131867. Up to 8383 conditions per place. [2024-06-21 21:40:51,498 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 421 selfloop transitions, 390 changer transitions 0/814 dead transitions. [2024-06-21 21:40:51,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 814 transitions, 19760 flow [2024-06-21 21:40:51,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:40:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:40:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 21:40:51,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 21:40:51,500 INFO L175 Difference]: Start difference. First operand has 272 places, 738 transitions, 17082 flow. Second operand 10 states and 195 transitions. [2024-06-21 21:40:51,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 814 transitions, 19760 flow [2024-06-21 21:40:53,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 814 transitions, 19227 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-21 21:40:53,772 INFO L231 Difference]: Finished difference. Result has 280 places, 742 transitions, 17531 flow [2024-06-21 21:40:53,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16565, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17531, PETRI_PLACES=280, PETRI_TRANSITIONS=742} [2024-06-21 21:40:53,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-21 21:40:53,773 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 742 transitions, 17531 flow [2024-06-21 21:40:53,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:53,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:40:53,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:40:53,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:40:53,774 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:40:53,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:40:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 313973287, now seen corresponding path program 4 times [2024-06-21 21:40:53,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:40:53,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609600678] [2024-06-21 21:40:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:40:53,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:40:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:40:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:40:57,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:40:57,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609600678] [2024-06-21 21:40:57,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609600678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:40:57,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:40:57,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:40:57,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723993129] [2024-06-21 21:40:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:40:57,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:40:57,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:40:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:40:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:40:58,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:40:58,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 742 transitions, 17531 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:40:58,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:40:58,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:40:58,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:02,716 INFO L124 PetriNetUnfolderBase]: 7919/11959 cut-off events. [2024-06-21 21:41:02,717 INFO L125 PetriNetUnfolderBase]: For 838833/838857 co-relation queries the response was YES. [2024-06-21 21:41:02,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137374 conditions, 11959 events. 7919/11959 cut-off events. For 838833/838857 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 72468 event pairs, 1908 based on Foata normal form. 80/12031 useless extension candidates. Maximal degree in co-relation 137235. Up to 11193 conditions per place. [2024-06-21 21:41:02,869 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 750 selfloop transitions, 48 changer transitions 0/801 dead transitions. [2024-06-21 21:41:02,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 801 transitions, 19793 flow [2024-06-21 21:41:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:41:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:41:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 21:41:02,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219512195121951 [2024-06-21 21:41:02,871 INFO L175 Difference]: Start difference. First operand has 280 places, 742 transitions, 17531 flow. Second operand 10 states and 173 transitions. [2024-06-21 21:41:02,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 801 transitions, 19793 flow [2024-06-21 21:41:05,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 801 transitions, 18920 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:05,013 INFO L231 Difference]: Finished difference. Result has 283 places, 743 transitions, 16832 flow [2024-06-21 21:41:05,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16658, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16832, PETRI_PLACES=283, PETRI_TRANSITIONS=743} [2024-06-21 21:41:05,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-21 21:41:05,014 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 743 transitions, 16832 flow [2024-06-21 21:41:05,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:05,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:05,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:05,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:41:05,014 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:05,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:05,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1793388109, now seen corresponding path program 1 times [2024-06-21 21:41:05,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:05,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034100956] [2024-06-21 21:41:05,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:05,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:09,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:09,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034100956] [2024-06-21 21:41:09,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034100956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:09,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:09,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:09,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801364489] [2024-06-21 21:41:09,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:09,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:09,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:09,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:41:09,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 743 transitions, 16832 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:09,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:09,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:41:09,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:14,767 INFO L124 PetriNetUnfolderBase]: 7999/12087 cut-off events. [2024-06-21 21:41:14,767 INFO L125 PetriNetUnfolderBase]: For 814151/814175 co-relation queries the response was YES. [2024-06-21 21:41:14,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136682 conditions, 12087 events. 7999/12087 cut-off events. For 814151/814175 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 73416 event pairs, 1943 based on Foata normal form. 32/12111 useless extension candidates. Maximal degree in co-relation 136542. Up to 11773 conditions per place. [2024-06-21 21:41:14,953 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 746 selfloop transitions, 45 changer transitions 0/794 dead transitions. [2024-06-21 21:41:14,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 794 transitions, 19040 flow [2024-06-21 21:41:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:41:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:41:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:41:14,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 21:41:14,955 INFO L175 Difference]: Start difference. First operand has 283 places, 743 transitions, 16832 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:41:14,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 794 transitions, 19040 flow [2024-06-21 21:41:17,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 794 transitions, 18925 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 21:41:17,318 INFO L231 Difference]: Finished difference. Result has 286 places, 745 transitions, 16909 flow [2024-06-21 21:41:17,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16717, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16909, PETRI_PLACES=286, PETRI_TRANSITIONS=745} [2024-06-21 21:41:17,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-21 21:41:17,319 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 745 transitions, 16909 flow [2024-06-21 21:41:17,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:17,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:17,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:17,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:41:17,320 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:17,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:17,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1793238007, now seen corresponding path program 5 times [2024-06-21 21:41:17,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:17,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013703856] [2024-06-21 21:41:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:17,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:41:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:41:21,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:41:21,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013703856] [2024-06-21 21:41:21,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013703856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:41:21,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:41:21,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:41:21,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049166498] [2024-06-21 21:41:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:41:21,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:41:21,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:41:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:41:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:41:21,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 41 [2024-06-21 21:41:21,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 745 transitions, 16909 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:21,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:41:21,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 41 [2024-06-21 21:41:21,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:41:26,124 INFO L124 PetriNetUnfolderBase]: 8275/12555 cut-off events. [2024-06-21 21:41:26,124 INFO L125 PetriNetUnfolderBase]: For 894936/894960 co-relation queries the response was YES. [2024-06-21 21:41:26,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140843 conditions, 12555 events. 8275/12555 cut-off events. For 894936/894960 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 77212 event pairs, 2026 based on Foata normal form. 80/12627 useless extension candidates. Maximal degree in co-relation 140701. Up to 11679 conditions per place. [2024-06-21 21:41:26,470 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 748 selfloop transitions, 54 changer transitions 0/805 dead transitions. [2024-06-21 21:41:26,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 805 transitions, 19279 flow [2024-06-21 21:41:26,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:41:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:41:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 21:41:26,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 21:41:26,471 INFO L175 Difference]: Start difference. First operand has 286 places, 745 transitions, 16909 flow. Second operand 10 states and 175 transitions. [2024-06-21 21:41:26,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 805 transitions, 19279 flow [2024-06-21 21:41:28,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 805 transitions, 19127 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 21:41:28,863 INFO L231 Difference]: Finished difference. Result has 289 places, 746 transitions, 16947 flow [2024-06-21 21:41:28,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16757, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16947, PETRI_PLACES=289, PETRI_TRANSITIONS=746} [2024-06-21 21:41:28,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-21 21:41:28,863 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 746 transitions, 16947 flow [2024-06-21 21:41:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:41:28,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:41:28,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:41:28,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:41:28,864 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:41:28,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:41:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1793234287, now seen corresponding path program 6 times [2024-06-21 21:41:28,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:41:28,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597871791] [2024-06-21 21:41:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:41:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:41:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat