./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix021_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix021_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix021_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix021_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 20:49:57,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:49:57,919 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:49:57,925 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:49:57,926 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:49:57,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:49:57,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:49:57,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:49:57,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:49:57,975 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:49:57,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:49:57,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:49:57,977 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:49:57,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:49:57,978 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:49:57,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:49:57,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:49:57,979 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:49:57,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:49:57,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:49:57,980 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:49:57,984 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:49:57,984 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:49:57,985 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:49:57,985 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:49:57,985 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:49:57,986 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:49:57,986 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:49:57,987 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:49:57,987 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:49:57,988 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:49:57,988 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:49:57,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:49:57,989 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:49:57,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:49:57,989 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:49:57,989 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:49:57,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:49:57,990 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:49:57,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:49:57,990 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:49:57,991 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:49:57,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:49:57,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:49:58,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:49:58,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:49:58,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:49:58,304 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:49:58,305 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:49:58,306 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix021_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:49:59,437 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:49:59,690 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:49:59,690 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix021_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:49:59,708 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d4fbd498/4d0c3822eb434723ab687dabe62f441f/FLAGeaee92f75 [2024-06-21 20:49:59,720 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d4fbd498/4d0c3822eb434723ab687dabe62f441f [2024-06-21 20:49:59,723 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:49:59,723 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:49:59,724 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix021_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 20:49:59,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:49:59,926 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:49:59,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:49:59,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:49:59,932 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:49:59,933 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:49:59" (1/2) ... [2024-06-21 20:49:59,934 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8d1caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:49:59, skipping insertion in model container [2024-06-21 20:49:59,934 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:49:59" (1/2) ... [2024-06-21 20:49:59,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2062d63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:49:59, skipping insertion in model container [2024-06-21 20:49:59,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:49:59" (2/2) ... [2024-06-21 20:49:59,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8d1caa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:49:59, skipping insertion in model container [2024-06-21 20:49:59,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:49:59" (2/2) ... [2024-06-21 20:49:59,938 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:50:00,067 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:50:00,069 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0) [2024-06-21 20:50:00,069 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0) [2024-06-21 20:50:00,069 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0) [2024-06-21 20:50:00,070 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((! multithreaded || a$r_buff1_thd3 == (_Bool)0) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && a$flush_delayed == (_Bool)0) && a$r_buff0_thd0 == (_Bool)0) && a$r_buff0_thd2 == (_Bool)0) && a$r_buff0_thd3 == (_Bool)0) && a$r_buff0_thd4 == (_Bool)0) && a$r_buff1_thd0 == (_Bool)0) && a$r_buff1_thd2 == (_Bool)0) && a$r_buff1_thd3 == (_Bool)0) && a$r_buff1_thd4 == (_Bool)0) && a$read_delayed == (_Bool)0) && a$read_delayed_var == 0) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (a$mem_tmp == 0 || a$mem_tmp == 1)) && (a$w_buff0 == 0 || a$w_buff0 == 1)) && (a$w_buff1 == 0 || a$w_buff1 == 1)) && (z == 0 || z == 1)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0) [2024-06-21 20:50:00,070 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:50:00,071 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-21 20:50:00,118 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:50:00,461 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:50:00,480 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:50:00,676 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:50:00,711 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:50:00,712 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:50:00 WrapperNode [2024-06-21 20:50:00,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:50:00,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:50:00,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:50:00,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:50:00,720 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,745 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,780 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 138 [2024-06-21 20:50:00,780 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:50:00,781 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:50:00,781 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:50:00,781 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:50:00,805 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,805 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,809 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,865 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 20:50:00,865 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,865 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,899 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,918 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,920 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,922 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,926 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:50:00,927 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:50:00,927 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:50:00,927 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:50:00,941 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 08:50:00" (1/1) ... [2024-06-21 20:50:00,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:50:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:50:00,975 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 20:50:00,999 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 20:50:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:50:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:50:01,021 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:50:01,021 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:50:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:50:01,022 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:50:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:50:01,022 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:50:01,022 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 20:50:01,023 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 20:50:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:50:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:50:01,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:50:01,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:50:01,025 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 20:50:01,200 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:50:01,202 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:50:01,617 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:50:01,618 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:50:01,782 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:50:01,783 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:50:01,784 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:50:01 BoogieIcfgContainer [2024-06-21 20:50:01,784 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:50:01,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:50:01,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:50:01,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:50:01,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:49:59" (1/4) ... [2024-06-21 20:50:01,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b423d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:50:01, skipping insertion in model container [2024-06-21 20:50:01,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:49:59" (2/4) ... [2024-06-21 20:50:01,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b423d9d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:50:01, skipping insertion in model container [2024-06-21 20:50:01,790 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 08:50:00" (3/4) ... [2024-06-21 20:50:01,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b423d9d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:50:01, skipping insertion in model container [2024-06-21 20:50:01,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:50:01" (4/4) ... [2024-06-21 20:50:01,792 INFO L112 eAbstractionObserver]: Analyzing ICFG mix021_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 20:50:01,807 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:50:01,808 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 20:50:01,808 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:50:01,882 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:50:01,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 20:50:01,943 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 20:50:01,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:50:01,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:50:01,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 20:50:01,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 20:50:01,956 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:50:01,962 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;@3d123bb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:50:01,962 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 20:50:01,965 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:50:01,966 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:50:01,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:50:01,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:01,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:50:01,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:01,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash 400592535, now seen corresponding path program 1 times [2024-06-21 20:50:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:01,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467005064] [2024-06-21 20:50:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:01,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:03,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467005064] [2024-06-21 20:50:03,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467005064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:03,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:03,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:50:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872966189] [2024-06-21 20:50:03,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:03,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:50:03,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:03,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:50:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:50:03,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:50:03,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:03,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:03,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:50:03,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:05,406 INFO L124 PetriNetUnfolderBase]: 11639/16207 cut-off events. [2024-06-21 20:50:05,407 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2024-06-21 20:50:05,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32423 conditions, 16207 events. 11639/16207 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 89292 event pairs, 9112 based on Foata normal form. 1/15957 useless extension candidates. Maximal degree in co-relation 32410. Up to 15753 conditions per place. [2024-06-21 20:50:05,535 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 44 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 20:50:05,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 231 flow [2024-06-21 20:50:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:50:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:50:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-21 20:50:05,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-21 20:50:05,550 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 95 transitions. [2024-06-21 20:50:05,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 231 flow [2024-06-21 20:50:05,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 20:50:05,560 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 20:50:05,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 20:50:05,566 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 20:50:05,566 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 20:50:05,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:05,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:05,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:05,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:50:05,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:05,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1577601866, now seen corresponding path program 1 times [2024-06-21 20:50:05,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:05,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932899671] [2024-06-21 20:50:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:05,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:06,446 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 20:50:06,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:06,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932899671] [2024-06-21 20:50:06,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932899671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:06,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:06,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:50:06,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309535687] [2024-06-21 20:50:06,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:50:06,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:06,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:50:06,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:50:06,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:50:06,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:06,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:06,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:50:06,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:08,393 INFO L124 PetriNetUnfolderBase]: 11629/16193 cut-off events. [2024-06-21 20:50:08,394 INFO L125 PetriNetUnfolderBase]: For 2878/2878 co-relation queries the response was YES. [2024-06-21 20:50:08,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36402 conditions, 16193 events. 11629/16193 cut-off events. For 2878/2878 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 89143 event pairs, 8311 based on Foata normal form. 4/16165 useless extension candidates. Maximal degree in co-relation 36390. Up to 15718 conditions per place. [2024-06-21 20:50:08,506 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 54 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 20:50:08,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 323 flow [2024-06-21 20:50:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:50:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:50:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-21 20:50:08,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-21 20:50:08,511 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 123 transitions. [2024-06-21 20:50:08,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 323 flow [2024-06-21 20:50:08,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:50:08,515 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 20:50:08,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 20:50:08,515 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 20:50:08,516 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 20:50:08,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:08,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:08,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:08,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:50:08,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:08,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:08,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1661016634, now seen corresponding path program 1 times [2024-06-21 20:50:08,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:08,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809812281] [2024-06-21 20:50:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:08,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809812281] [2024-06-21 20:50:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809812281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:09,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:09,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:50:09,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478466060] [2024-06-21 20:50:09,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:09,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:50:09,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:50:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:50:09,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:50:09,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:09,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:09,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:50:09,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:11,729 INFO L124 PetriNetUnfolderBase]: 11647/16273 cut-off events. [2024-06-21 20:50:11,730 INFO L125 PetriNetUnfolderBase]: For 8289/8289 co-relation queries the response was YES. [2024-06-21 20:50:11,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40506 conditions, 16273 events. 11647/16273 cut-off events. For 8289/8289 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 90052 event pairs, 6983 based on Foata normal form. 7/16277 useless extension candidates. Maximal degree in co-relation 40492. Up to 15639 conditions per place. [2024-06-21 20:50:11,829 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-21 20:50:11,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 539 flow [2024-06-21 20:50:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:50:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:50:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-21 20:50:11,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-21 20:50:11,835 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 161 transitions. [2024-06-21 20:50:11,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 539 flow [2024-06-21 20:50:11,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 520 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 20:50:11,841 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-21 20:50:11,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-21 20:50:11,843 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-21 20:50:11,843 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-21 20:50:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:11,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:11,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:11,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:50:11,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:11,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash 131209775, now seen corresponding path program 1 times [2024-06-21 20:50:11,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:11,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415624191] [2024-06-21 20:50:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:11,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415624191] [2024-06-21 20:50:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415624191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:13,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:13,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:50:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660517080] [2024-06-21 20:50:13,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:13,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:50:13,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:13,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:50:13,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:50:13,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:50:13,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:13,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:13,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:50:13,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:14,792 INFO L124 PetriNetUnfolderBase]: 11665/16299 cut-off events. [2024-06-21 20:50:14,792 INFO L125 PetriNetUnfolderBase]: For 19413/19418 co-relation queries the response was YES. [2024-06-21 20:50:14,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46749 conditions, 16299 events. 11665/16299 cut-off events. For 19413/19418 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 90074 event pairs, 6182 based on Foata normal form. 11/16307 useless extension candidates. Maximal degree in co-relation 46732. Up to 15625 conditions per place. [2024-06-21 20:50:15,062 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 82 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-21 20:50:15,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 115 transitions, 708 flow [2024-06-21 20:50:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:50:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:50:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-21 20:50:15,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-21 20:50:15,064 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 190 transitions. [2024-06-21 20:50:15,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 115 transitions, 708 flow [2024-06-21 20:50:15,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 696 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 20:50:15,075 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 404 flow [2024-06-21 20:50:15,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-21 20:50:15,078 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-21 20:50:15,078 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 404 flow [2024-06-21 20:50:15,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:15,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:15,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:15,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:50:15,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:15,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1490880453, now seen corresponding path program 1 times [2024-06-21 20:50:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126804622] [2024-06-21 20:50:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:15,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:16,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:16,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126804622] [2024-06-21 20:50:16,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126804622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:16,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:16,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:50:16,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103585946] [2024-06-21 20:50:16,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:16,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:50:16,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:16,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:50:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:50:16,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 20:50:16,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:16,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:16,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 20:50:16,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:18,114 INFO L124 PetriNetUnfolderBase]: 11694/16338 cut-off events. [2024-06-21 20:50:18,115 INFO L125 PetriNetUnfolderBase]: For 30752/30757 co-relation queries the response was YES. [2024-06-21 20:50:18,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51654 conditions, 16338 events. 11694/16338 cut-off events. For 30752/30757 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 90311 event pairs, 5263 based on Foata normal form. 18/16353 useless extension candidates. Maximal degree in co-relation 51634. Up to 15590 conditions per place. [2024-06-21 20:50:18,248 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 89 selfloop transitions, 30 changer transitions 0/126 dead transitions. [2024-06-21 20:50:18,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 126 transitions, 852 flow [2024-06-21 20:50:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:50:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:50:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-21 20:50:18,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906593406593407 [2024-06-21 20:50:18,255 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 404 flow. Second operand 7 states and 215 transitions. [2024-06-21 20:50:18,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 126 transitions, 852 flow [2024-06-21 20:50:18,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 126 transitions, 786 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:50:18,269 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 443 flow [2024-06-21 20:50:18,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-21 20:50:18,273 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 20:50:18,273 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 443 flow [2024-06-21 20:50:18,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:18,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:18,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:18,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:50:18,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:18,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1084653298, now seen corresponding path program 1 times [2024-06-21 20:50:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:18,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074328812] [2024-06-21 20:50:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:19,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074328812] [2024-06-21 20:50:19,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074328812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:19,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:19,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:50:19,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517225687] [2024-06-21 20:50:19,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:19,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:50:19,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:19,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:50:19,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:50:19,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:19,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 443 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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 20:50:19,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:19,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:19,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:20,857 INFO L124 PetriNetUnfolderBase]: 11685/16302 cut-off events. [2024-06-21 20:50:20,857 INFO L125 PetriNetUnfolderBase]: For 43409/43409 co-relation queries the response was YES. [2024-06-21 20:50:20,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55426 conditions, 16302 events. 11685/16302 cut-off events. For 43409/43409 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 89806 event pairs, 6112 based on Foata normal form. 3/16303 useless extension candidates. Maximal degree in co-relation 55404. Up to 15805 conditions per place. [2024-06-21 20:50:20,996 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 73 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2024-06-21 20:50:20,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 653 flow [2024-06-21 20:50:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:50:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:50:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 20:50:20,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-06-21 20:50:21,000 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 443 flow. Second operand 5 states and 123 transitions. [2024-06-21 20:50:21,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 653 flow [2024-06-21 20:50:21,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 89 transitions, 566 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:21,017 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 387 flow [2024-06-21 20:50:21,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-06-21 20:50:21,021 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 20:50:21,021 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 387 flow [2024-06-21 20:50:21,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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 20:50:21,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:21,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:21,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:50:21,022 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:21,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -765035948, now seen corresponding path program 1 times [2024-06-21 20:50:21,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:21,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151992185] [2024-06-21 20:50:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151992185] [2024-06-21 20:50:21,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151992185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:21,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:21,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:50:21,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152297391] [2024-06-21 20:50:21,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:21,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:50:21,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:21,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:50:21,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:50:22,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:22,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 387 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:22,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:22,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:22,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:23,791 INFO L124 PetriNetUnfolderBase]: 11751/16628 cut-off events. [2024-06-21 20:50:23,792 INFO L125 PetriNetUnfolderBase]: For 50290/50290 co-relation queries the response was YES. [2024-06-21 20:50:23,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56695 conditions, 16628 events. 11751/16628 cut-off events. For 50290/50290 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 93171 event pairs, 5767 based on Foata normal form. 14/16639 useless extension candidates. Maximal degree in co-relation 56671. Up to 15681 conditions per place. [2024-06-21 20:50:23,922 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 91 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-21 20:50:23,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 119 transitions, 837 flow [2024-06-21 20:50:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:50:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:50:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 20:50:23,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-21 20:50:23,925 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 387 flow. Second operand 6 states and 159 transitions. [2024-06-21 20:50:23,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 119 transitions, 837 flow [2024-06-21 20:50:23,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 119 transitions, 808 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 20:50:23,945 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 544 flow [2024-06-21 20:50:23,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=544, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-21 20:50:23,947 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-21 20:50:23,947 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 544 flow [2024-06-21 20:50:23,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:23,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:23,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:23,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:50:23,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:23,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash -203748305, now seen corresponding path program 1 times [2024-06-21 20:50:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:23,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916910858] [2024-06-21 20:50:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:23,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:24,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:24,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916910858] [2024-06-21 20:50:24,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916910858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:24,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:24,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:50:24,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223670475] [2024-06-21 20:50:24,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:50:24,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:50:24,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:50:25,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:25,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 544 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:25,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:25,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:25,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:26,741 INFO L124 PetriNetUnfolderBase]: 11764/16658 cut-off events. [2024-06-21 20:50:26,741 INFO L125 PetriNetUnfolderBase]: For 70591/70601 co-relation queries the response was YES. [2024-06-21 20:50:26,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63021 conditions, 16658 events. 11764/16658 cut-off events. For 70591/70601 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 93624 event pairs, 5928 based on Foata normal form. 14/16669 useless extension candidates. Maximal degree in co-relation 62995. Up to 15795 conditions per place. [2024-06-21 20:50:26,848 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 89 selfloop transitions, 25 changer transitions 0/120 dead transitions. [2024-06-21 20:50:26,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 120 transitions, 921 flow [2024-06-21 20:50:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:50:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:50:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:50:26,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 20:50:26,850 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 544 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:50:26,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 120 transitions, 921 flow [2024-06-21 20:50:26,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 893 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-06-21 20:50:26,884 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 612 flow [2024-06-21 20:50:26,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=612, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2024-06-21 20:50:26,884 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 20:50:26,885 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 612 flow [2024-06-21 20:50:26,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:26,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:26,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:26,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:50:26,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:26,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1325211631, now seen corresponding path program 2 times [2024-06-21 20:50:26,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:26,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983808602] [2024-06-21 20:50:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:26,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:27,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:27,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983808602] [2024-06-21 20:50:27,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983808602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:27,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:27,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:50:27,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13808362] [2024-06-21 20:50:27,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:27,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:50:27,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:27,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:50:27,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:50:27,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:27,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 612 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:27,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:27,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:27,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:29,398 INFO L124 PetriNetUnfolderBase]: 11734/16611 cut-off events. [2024-06-21 20:50:29,398 INFO L125 PetriNetUnfolderBase]: For 77749/77749 co-relation queries the response was YES. [2024-06-21 20:50:29,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63520 conditions, 16611 events. 11734/16611 cut-off events. For 77749/77749 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 93337 event pairs, 5921 based on Foata normal form. 3/16612 useless extension candidates. Maximal degree in co-relation 63491. Up to 15851 conditions per place. [2024-06-21 20:50:29,507 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 94 selfloop transitions, 14 changer transitions 0/114 dead transitions. [2024-06-21 20:50:29,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 890 flow [2024-06-21 20:50:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:50:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:50:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:50:29,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 20:50:29,508 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 612 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:50:29,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 890 flow [2024-06-21 20:50:29,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 847 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 20:50:29,547 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 608 flow [2024-06-21 20:50:29,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=608, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-21 20:50:29,548 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-21 20:50:29,548 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 608 flow [2024-06-21 20:50:29,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:29,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:29,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:29,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:50:29,549 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:29,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash -937485163, now seen corresponding path program 1 times [2024-06-21 20:50:29,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:29,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227855640] [2024-06-21 20:50:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:29,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:30,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:30,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227855640] [2024-06-21 20:50:30,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227855640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:30,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:30,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:50:30,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970701659] [2024-06-21 20:50:30,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:30,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:50:30,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:30,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:50:30,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:50:30,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:30,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:30,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:30,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:30,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:32,322 INFO L124 PetriNetUnfolderBase]: 12558/17647 cut-off events. [2024-06-21 20:50:32,322 INFO L125 PetriNetUnfolderBase]: For 94571/94571 co-relation queries the response was YES. [2024-06-21 20:50:32,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69095 conditions, 17647 events. 12558/17647 cut-off events. For 94571/94571 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 98279 event pairs, 5132 based on Foata normal form. 28/17668 useless extension candidates. Maximal degree in co-relation 69065. Up to 15868 conditions per place. [2024-06-21 20:50:32,454 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 121 selfloop transitions, 41 changer transitions 0/168 dead transitions. [2024-06-21 20:50:32,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 168 transitions, 1426 flow [2024-06-21 20:50:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:50:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:50:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 20:50:32,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412087912087912 [2024-06-21 20:50:32,456 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 608 flow. Second operand 7 states and 197 transitions. [2024-06-21 20:50:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 168 transitions, 1426 flow [2024-06-21 20:50:32,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 168 transitions, 1366 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:32,506 INFO L231 Difference]: Finished difference. Result has 86 places, 115 transitions, 914 flow [2024-06-21 20:50:32,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=914, PETRI_PLACES=86, PETRI_TRANSITIONS=115} [2024-06-21 20:50:32,507 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 20:50:32,507 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 115 transitions, 914 flow [2024-06-21 20:50:32,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:32,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:32,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:32,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:50:32,508 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:32,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1100507837, now seen corresponding path program 2 times [2024-06-21 20:50:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:32,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094481766] [2024-06-21 20:50:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:33,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:33,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094481766] [2024-06-21 20:50:33,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094481766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:33,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:33,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:50:33,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443536280] [2024-06-21 20:50:33,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:33,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:50:33,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:50:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:50:33,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:33,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 115 transitions, 914 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:33,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:33,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:33,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:35,408 INFO L124 PetriNetUnfolderBase]: 12686/17857 cut-off events. [2024-06-21 20:50:35,408 INFO L125 PetriNetUnfolderBase]: For 130145/130155 co-relation queries the response was YES. [2024-06-21 20:50:35,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80604 conditions, 17857 events. 12686/17857 cut-off events. For 130145/130155 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 99775 event pairs, 5520 based on Foata normal form. 14/17863 useless extension candidates. Maximal degree in co-relation 80570. Up to 16979 conditions per place. [2024-06-21 20:50:35,537 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-21 20:50:35,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 163 transitions, 1510 flow [2024-06-21 20:50:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:50:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:50:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:50:35,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-21 20:50:35,540 INFO L175 Difference]: Start difference. First operand has 86 places, 115 transitions, 914 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:50:35,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 163 transitions, 1510 flow [2024-06-21 20:50:35,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 163 transitions, 1452 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-06-21 20:50:35,615 INFO L231 Difference]: Finished difference. Result has 95 places, 126 transitions, 1070 flow [2024-06-21 20:50:35,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1070, PETRI_PLACES=95, PETRI_TRANSITIONS=126} [2024-06-21 20:50:35,616 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2024-06-21 20:50:35,616 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 126 transitions, 1070 flow [2024-06-21 20:50:35,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:35,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:35,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:35,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:50:35,617 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:35,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:35,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1130007437, now seen corresponding path program 3 times [2024-06-21 20:50:35,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:35,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589717687] [2024-06-21 20:50:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:35,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:36,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:36,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589717687] [2024-06-21 20:50:36,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589717687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:36,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:36,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:50:36,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179306705] [2024-06-21 20:50:36,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:36,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:50:36,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:36,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:50:36,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:50:36,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:36,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 126 transitions, 1070 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:36,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:36,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:36,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:38,760 INFO L124 PetriNetUnfolderBase]: 12752/17950 cut-off events. [2024-06-21 20:50:38,760 INFO L125 PetriNetUnfolderBase]: For 150436/150436 co-relation queries the response was YES. [2024-06-21 20:50:38,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83558 conditions, 17950 events. 12752/17950 cut-off events. For 150436/150436 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 100271 event pairs, 5508 based on Foata normal form. 14/17961 useless extension candidates. Maximal degree in co-relation 83518. Up to 16854 conditions per place. [2024-06-21 20:50:38,898 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 134 selfloop transitions, 38 changer transitions 0/178 dead transitions. [2024-06-21 20:50:38,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 178 transitions, 1788 flow [2024-06-21 20:50:38,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:50:38,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47596153846153844 [2024-06-21 20:50:38,901 INFO L175 Difference]: Start difference. First operand has 95 places, 126 transitions, 1070 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:50:38,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 178 transitions, 1788 flow [2024-06-21 20:50:38,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 178 transitions, 1716 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 20:50:39,001 INFO L231 Difference]: Finished difference. Result has 102 places, 138 transitions, 1256 flow [2024-06-21 20:50:39,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=102, PETRI_TRANSITIONS=138} [2024-06-21 20:50:39,002 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-21 20:50:39,002 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 138 transitions, 1256 flow [2024-06-21 20:50:39,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:39,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:39,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:39,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:50:39,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:39,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 954073619, now seen corresponding path program 1 times [2024-06-21 20:50:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:39,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792166770] [2024-06-21 20:50:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:39,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:40,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792166770] [2024-06-21 20:50:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792166770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:40,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:40,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:50:40,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859052251] [2024-06-21 20:50:40,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:40,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:50:40,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:40,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:50:40,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:50:40,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:40,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 138 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:40,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:40,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:40,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:42,731 INFO L124 PetriNetUnfolderBase]: 12933/18202 cut-off events. [2024-06-21 20:50:42,731 INFO L125 PetriNetUnfolderBase]: For 179276/179276 co-relation queries the response was YES. [2024-06-21 20:50:42,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88130 conditions, 18202 events. 12933/18202 cut-off events. For 179276/179276 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 101932 event pairs, 5404 based on Foata normal form. 30/18229 useless extension candidates. Maximal degree in co-relation 88087. Up to 17043 conditions per place. [2024-06-21 20:50:42,863 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 144 selfloop transitions, 35 changer transitions 0/185 dead transitions. [2024-06-21 20:50:42,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 185 transitions, 1878 flow [2024-06-21 20:50:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:50:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:50:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 20:50:42,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-21 20:50:42,865 INFO L175 Difference]: Start difference. First operand has 102 places, 138 transitions, 1256 flow. Second operand 7 states and 187 transitions. [2024-06-21 20:50:42,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 185 transitions, 1878 flow [2024-06-21 20:50:42,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 185 transitions, 1807 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 20:50:42,971 INFO L231 Difference]: Finished difference. Result has 106 places, 141 transitions, 1314 flow [2024-06-21 20:50:42,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=106, PETRI_TRANSITIONS=141} [2024-06-21 20:50:42,972 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-21 20:50:42,972 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 141 transitions, 1314 flow [2024-06-21 20:50:42,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:42,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:42,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:42,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:50:42,973 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:42,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:42,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1137705497, now seen corresponding path program 1 times [2024-06-21 20:50:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33649313] [2024-06-21 20:50:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:43,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:43,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33649313] [2024-06-21 20:50:43,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33649313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:43,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:43,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:50:43,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023523617] [2024-06-21 20:50:43,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:43,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:50:43,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:43,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:50:43,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:50:43,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:43,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 141 transitions, 1314 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:43,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:43,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:43,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:45,851 INFO L124 PetriNetUnfolderBase]: 12919/18190 cut-off events. [2024-06-21 20:50:45,851 INFO L125 PetriNetUnfolderBase]: For 199315/199315 co-relation queries the response was YES. [2024-06-21 20:50:45,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91042 conditions, 18190 events. 12919/18190 cut-off events. For 199315/199315 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 101724 event pairs, 5549 based on Foata normal form. 4/18192 useless extension candidates. Maximal degree in co-relation 90997. Up to 17452 conditions per place. [2024-06-21 20:50:45,981 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 134 selfloop transitions, 14 changer transitions 0/154 dead transitions. [2024-06-21 20:50:45,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 154 transitions, 1644 flow [2024-06-21 20:50:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:50:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:50:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 20:50:45,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 20:50:45,982 INFO L175 Difference]: Start difference. First operand has 106 places, 141 transitions, 1314 flow. Second operand 5 states and 120 transitions. [2024-06-21 20:50:45,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 154 transitions, 1644 flow [2024-06-21 20:50:46,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 154 transitions, 1521 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:50:46,080 INFO L231 Difference]: Finished difference. Result has 106 places, 141 transitions, 1231 flow [2024-06-21 20:50:46,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1231, PETRI_PLACES=106, PETRI_TRANSITIONS=141} [2024-06-21 20:50:46,081 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-21 20:50:46,081 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 141 transitions, 1231 flow [2024-06-21 20:50:46,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:46,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:46,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:46,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:50:46,082 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:46,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:46,082 INFO L85 PathProgramCache]: Analyzing trace with hash 998916750, now seen corresponding path program 1 times [2024-06-21 20:50:46,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:46,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959323824] [2024-06-21 20:50:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:46,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:47,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:47,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959323824] [2024-06-21 20:50:47,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959323824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:47,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:47,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:50:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264448274] [2024-06-21 20:50:47,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:50:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:50:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:50:47,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:47,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 141 transitions, 1231 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:47,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:47,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:47,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:49,600 INFO L124 PetriNetUnfolderBase]: 12910/18170 cut-off events. [2024-06-21 20:50:49,600 INFO L125 PetriNetUnfolderBase]: For 213905/213918 co-relation queries the response was YES. [2024-06-21 20:50:49,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91440 conditions, 18170 events. 12910/18170 cut-off events. For 213905/213918 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 101623 event pairs, 5435 based on Foata normal form. 13/18180 useless extension candidates. Maximal degree in co-relation 91394. Up to 17274 conditions per place. [2024-06-21 20:50:49,730 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 147 selfloop transitions, 35 changer transitions 0/188 dead transitions. [2024-06-21 20:50:49,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 188 transitions, 1769 flow [2024-06-21 20:50:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:50:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:50:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:50:49,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-21 20:50:49,732 INFO L175 Difference]: Start difference. First operand has 106 places, 141 transitions, 1231 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:50:49,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 188 transitions, 1769 flow [2024-06-21 20:50:49,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 188 transitions, 1717 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 20:50:49,882 INFO L231 Difference]: Finished difference. Result has 110 places, 145 transitions, 1327 flow [2024-06-21 20:50:49,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1327, PETRI_PLACES=110, PETRI_TRANSITIONS=145} [2024-06-21 20:50:49,884 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-21 20:50:49,884 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 145 transitions, 1327 flow [2024-06-21 20:50:49,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:49,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:49,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:49,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:50:49,885 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:49,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:49,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1002731765, now seen corresponding path program 1 times [2024-06-21 20:50:49,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:49,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160207049] [2024-06-21 20:50:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:49,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160207049] [2024-06-21 20:50:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160207049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:50,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:50,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:50:50,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73417258] [2024-06-21 20:50:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:50:50,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:50,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:50:50,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:50:51,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:51,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 145 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:51,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:51,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:51,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:53,247 INFO L124 PetriNetUnfolderBase]: 13192/18505 cut-off events. [2024-06-21 20:50:53,247 INFO L125 PetriNetUnfolderBase]: For 246864/246869 co-relation queries the response was YES. [2024-06-21 20:50:53,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97517 conditions, 18505 events. 13192/18505 cut-off events. For 246864/246869 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 103026 event pairs, 4983 based on Foata normal form. 18/18516 useless extension candidates. Maximal degree in co-relation 97471. Up to 16393 conditions per place. [2024-06-21 20:50:53,396 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 134 selfloop transitions, 65 changer transitions 0/205 dead transitions. [2024-06-21 20:50:53,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 205 transitions, 2279 flow [2024-06-21 20:50:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:50:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:50:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 20:50:53,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 20:50:53,398 INFO L175 Difference]: Start difference. First operand has 110 places, 145 transitions, 1327 flow. Second operand 7 states and 196 transitions. [2024-06-21 20:50:53,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 205 transitions, 2279 flow [2024-06-21 20:50:53,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 205 transitions, 2165 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:50:53,521 INFO L231 Difference]: Finished difference. Result has 113 places, 156 transitions, 1572 flow [2024-06-21 20:50:53,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1572, PETRI_PLACES=113, PETRI_TRANSITIONS=156} [2024-06-21 20:50:53,522 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-21 20:50:53,522 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 156 transitions, 1572 flow [2024-06-21 20:50:53,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:53,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:53,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:53,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:50:53,523 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:53,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1766398569, now seen corresponding path program 2 times [2024-06-21 20:50:53,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:53,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501919604] [2024-06-21 20:50:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:53,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:54,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:54,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501919604] [2024-06-21 20:50:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501919604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:54,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:54,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:50:54,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433717731] [2024-06-21 20:50:54,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:54,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:50:54,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:50:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:50:54,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:54,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 156 transitions, 1572 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:54,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:54,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:54,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:50:56,680 INFO L124 PetriNetUnfolderBase]: 13166/18467 cut-off events. [2024-06-21 20:50:56,680 INFO L125 PetriNetUnfolderBase]: For 287261/287266 co-relation queries the response was YES. [2024-06-21 20:50:56,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102383 conditions, 18467 events. 13166/18467 cut-off events. For 287261/287266 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 102967 event pairs, 5062 based on Foata normal form. 18/18478 useless extension candidates. Maximal degree in co-relation 102334. Up to 16382 conditions per place. [2024-06-21 20:50:56,873 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 135 selfloop transitions, 69 changer transitions 0/210 dead transitions. [2024-06-21 20:50:56,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 210 transitions, 2430 flow [2024-06-21 20:50:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:50:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:50:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 20:50:56,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5467032967032966 [2024-06-21 20:50:56,875 INFO L175 Difference]: Start difference. First operand has 113 places, 156 transitions, 1572 flow. Second operand 7 states and 199 transitions. [2024-06-21 20:50:56,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 210 transitions, 2430 flow [2024-06-21 20:50:57,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 210 transitions, 2277 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 20:50:57,191 INFO L231 Difference]: Finished difference. Result has 119 places, 160 transitions, 1702 flow [2024-06-21 20:50:57,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1702, PETRI_PLACES=119, PETRI_TRANSITIONS=160} [2024-06-21 20:50:57,191 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-21 20:50:57,191 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 160 transitions, 1702 flow [2024-06-21 20:50:57,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:57,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:50:57,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:50:57,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:50:57,192 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:50:57,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:50:57,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2084290809, now seen corresponding path program 3 times [2024-06-21 20:50:57,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:50:57,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420023736] [2024-06-21 20:50:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:50:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:50:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:50:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:50:58,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:50:58,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420023736] [2024-06-21 20:50:58,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420023736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:50:58,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:50:58,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:50:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528097502] [2024-06-21 20:50:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:50:58,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:50:58,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:50:58,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:50:58,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:50:58,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:50:58,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 160 transitions, 1702 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:50:58,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:50:58,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:50:58,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:00,663 INFO L124 PetriNetUnfolderBase]: 13232/18583 cut-off events. [2024-06-21 20:51:00,663 INFO L125 PetriNetUnfolderBase]: For 312137/312150 co-relation queries the response was YES. [2024-06-21 20:51:00,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105139 conditions, 18583 events. 13232/18583 cut-off events. For 312137/312150 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 104079 event pairs, 5485 based on Foata normal form. 24/18601 useless extension candidates. Maximal degree in co-relation 105087. Up to 17622 conditions per place. [2024-06-21 20:51:00,845 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 164 selfloop transitions, 31 changer transitions 0/201 dead transitions. [2024-06-21 20:51:00,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 2350 flow [2024-06-21 20:51:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:51:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:51:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:51:00,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-21 20:51:00,847 INFO L175 Difference]: Start difference. First operand has 119 places, 160 transitions, 1702 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:51:00,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 2350 flow [2024-06-21 20:51:01,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 201 transitions, 2213 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:51:01,040 INFO L231 Difference]: Finished difference. Result has 121 places, 165 transitions, 1741 flow [2024-06-21 20:51:01,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1741, PETRI_PLACES=121, PETRI_TRANSITIONS=165} [2024-06-21 20:51:01,041 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-21 20:51:01,041 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 165 transitions, 1741 flow [2024-06-21 20:51:01,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:01,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:01,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:01,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:51:01,042 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:51:01,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2084557936, now seen corresponding path program 1 times [2024-06-21 20:51:01,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:01,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570109260] [2024-06-21 20:51:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:02,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:02,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570109260] [2024-06-21 20:51:02,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570109260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:02,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:02,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:02,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323820968] [2024-06-21 20:51:02,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:02,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:02,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:02,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:02,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:51:02,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 165 transitions, 1741 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:02,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:02,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:51:02,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:05,226 INFO L124 PetriNetUnfolderBase]: 13265/18621 cut-off events. [2024-06-21 20:51:05,226 INFO L125 PetriNetUnfolderBase]: For 336561/336571 co-relation queries the response was YES. [2024-06-21 20:51:05,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105705 conditions, 18621 events. 13265/18621 cut-off events. For 336561/336571 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 104016 event pairs, 5440 based on Foata normal form. 7/18620 useless extension candidates. Maximal degree in co-relation 105653. Up to 17695 conditions per place. [2024-06-21 20:51:05,357 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 166 selfloop transitions, 40 changer transitions 0/212 dead transitions. [2024-06-21 20:51:05,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 212 transitions, 2453 flow [2024-06-21 20:51:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:51:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:51:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:51:05,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-06-21 20:51:05,359 INFO L175 Difference]: Start difference. First operand has 121 places, 165 transitions, 1741 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:51:05,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 212 transitions, 2453 flow [2024-06-21 20:51:05,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 212 transitions, 2353 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 20:51:05,557 INFO L231 Difference]: Finished difference. Result has 125 places, 178 transitions, 1929 flow [2024-06-21 20:51:05,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1929, PETRI_PLACES=125, PETRI_TRANSITIONS=178} [2024-06-21 20:51:05,557 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-21 20:51:05,558 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 178 transitions, 1929 flow [2024-06-21 20:51:05,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:05,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:05,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:05,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:51:05,558 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:51:05,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 901588536, now seen corresponding path program 1 times [2024-06-21 20:51:05,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:05,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605416309] [2024-06-21 20:51:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:05,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:07,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:07,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605416309] [2024-06-21 20:51:07,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605416309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:07,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:07,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:07,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708351899] [2024-06-21 20:51:07,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:07,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:07,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:51:07,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 178 transitions, 1929 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:07,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:07,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:51:07,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:10,161 INFO L124 PetriNetUnfolderBase]: 13301/18666 cut-off events. [2024-06-21 20:51:10,161 INFO L125 PetriNetUnfolderBase]: For 377496/377509 co-relation queries the response was YES. [2024-06-21 20:51:10,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112611 conditions, 18666 events. 13301/18666 cut-off events. For 377496/377509 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 104140 event pairs, 4574 based on Foata normal form. 16/18679 useless extension candidates. Maximal degree in co-relation 112556. Up to 17653 conditions per place. [2024-06-21 20:51:10,353 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 185 selfloop transitions, 41 changer transitions 0/232 dead transitions. [2024-06-21 20:51:10,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 232 transitions, 2759 flow [2024-06-21 20:51:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:51:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:51:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 20:51:10,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-21 20:51:10,355 INFO L175 Difference]: Start difference. First operand has 125 places, 178 transitions, 1929 flow. Second operand 8 states and 206 transitions. [2024-06-21 20:51:10,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 232 transitions, 2759 flow [2024-06-21 20:51:10,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 232 transitions, 2665 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 20:51:10,609 INFO L231 Difference]: Finished difference. Result has 130 places, 184 transitions, 2073 flow [2024-06-21 20:51:10,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2073, PETRI_PLACES=130, PETRI_TRANSITIONS=184} [2024-06-21 20:51:10,610 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-21 20:51:10,610 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 184 transitions, 2073 flow [2024-06-21 20:51:10,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:10,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:10,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:10,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:51:10,611 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:51:10,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash 901649110, now seen corresponding path program 1 times [2024-06-21 20:51:10,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:10,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423863718] [2024-06-21 20:51:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:10,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:11,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:11,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423863718] [2024-06-21 20:51:11,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423863718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:11,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:11,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:11,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643965085] [2024-06-21 20:51:11,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:11,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:11,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:12,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:51:12,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 184 transitions, 2073 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:12,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:12,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:51:12,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:15,158 INFO L124 PetriNetUnfolderBase]: 13713/19151 cut-off events. [2024-06-21 20:51:15,158 INFO L125 PetriNetUnfolderBase]: For 425945/425950 co-relation queries the response was YES. [2024-06-21 20:51:15,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118865 conditions, 19151 events. 13713/19151 cut-off events. For 425945/425950 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 106672 event pairs, 4603 based on Foata normal form. 18/19160 useless extension candidates. Maximal degree in co-relation 118809. Up to 16391 conditions per place. [2024-06-21 20:51:15,330 INFO L140 encePairwiseOnDemand]: 35/52 looper letters, 185 selfloop transitions, 90 changer transitions 0/281 dead transitions. [2024-06-21 20:51:15,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 281 transitions, 3565 flow [2024-06-21 20:51:15,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:51:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:51:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 285 transitions. [2024-06-21 20:51:15,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-21 20:51:15,332 INFO L175 Difference]: Start difference. First operand has 130 places, 184 transitions, 2073 flow. Second operand 10 states and 285 transitions. [2024-06-21 20:51:15,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 281 transitions, 3565 flow [2024-06-21 20:51:15,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 281 transitions, 3446 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 20:51:15,797 INFO L231 Difference]: Finished difference. Result has 138 places, 199 transitions, 2394 flow [2024-06-21 20:51:15,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2394, PETRI_PLACES=138, PETRI_TRANSITIONS=199} [2024-06-21 20:51:15,797 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-21 20:51:15,797 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 199 transitions, 2394 flow [2024-06-21 20:51:15,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:15,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:15,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:15,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:51:15,798 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:51:15,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 901648986, now seen corresponding path program 2 times [2024-06-21 20:51:15,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:15,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181936657] [2024-06-21 20:51:15,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:15,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:17,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:17,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181936657] [2024-06-21 20:51:17,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181936657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:17,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:17,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462080981] [2024-06-21 20:51:17,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:17,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:17,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:17,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:17,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:17,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:51:17,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 199 transitions, 2394 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:17,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:17,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:51:17,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:20,472 INFO L124 PetriNetUnfolderBase]: 13771/19267 cut-off events. [2024-06-21 20:51:20,472 INFO L125 PetriNetUnfolderBase]: For 488913/488926 co-relation queries the response was YES. [2024-06-21 20:51:20,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126683 conditions, 19267 events. 13771/19267 cut-off events. For 488913/488926 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 107614 event pairs, 5212 based on Foata normal form. 16/19278 useless extension candidates. Maximal degree in co-relation 126623. Up to 18391 conditions per place. [2024-06-21 20:51:20,645 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 205 selfloop transitions, 39 changer transitions 0/250 dead transitions. [2024-06-21 20:51:20,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 250 transitions, 3088 flow [2024-06-21 20:51:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:51:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:51:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 20:51:20,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 20:51:20,647 INFO L175 Difference]: Start difference. First operand has 138 places, 199 transitions, 2394 flow. Second operand 8 states and 202 transitions. [2024-06-21 20:51:20,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 250 transitions, 3088 flow [2024-06-21 20:51:20,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 250 transitions, 2894 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 20:51:21,000 INFO L231 Difference]: Finished difference. Result has 141 places, 206 transitions, 2382 flow [2024-06-21 20:51:21,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2382, PETRI_PLACES=141, PETRI_TRANSITIONS=206} [2024-06-21 20:51:21,001 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-21 20:51:21,001 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 206 transitions, 2382 flow [2024-06-21 20:51:21,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:21,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:51:21,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:51:21,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:51:21,002 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 20:51:21,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:51:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash 904445496, now seen corresponding path program 3 times [2024-06-21 20:51:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:51:21,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726335095] [2024-06-21 20:51:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:51:21,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:51:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:51:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:51:22,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:51:22,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726335095] [2024-06-21 20:51:22,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726335095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:51:22,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:51:22,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:51:22,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854327884] [2024-06-21 20:51:22,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:51:22,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:51:22,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:51:22,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:51:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:51:22,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 20:51:22,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 206 transitions, 2382 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:51:22,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:51:22,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 20:51:22,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:51:25,890 INFO L124 PetriNetUnfolderBase]: 13756/19246 cut-off events. [2024-06-21 20:51:25,890 INFO L125 PetriNetUnfolderBase]: For 508481/508494 co-relation queries the response was YES. [2024-06-21 20:51:26,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126893 conditions, 19246 events. 13756/19246 cut-off events. For 508481/508494 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 107458 event pairs, 5209 based on Foata normal form. 16/19257 useless extension candidates. Maximal degree in co-relation 126831. Up to 18421 conditions per place. [2024-06-21 20:51:26,117 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 208 selfloop transitions, 33 changer transitions 0/247 dead transitions. [2024-06-21 20:51:26,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 247 transitions, 2972 flow [2024-06-21 20:51:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:51:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:51:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:51:26,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47836538461538464 [2024-06-21 20:51:26,120 INFO L175 Difference]: Start difference. First operand has 141 places, 206 transitions, 2382 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:51:26,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 247 transitions, 2972 flow