./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix039.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/mix039.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/mix039.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix039.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:06:47,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:06:47,938 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:06:47,944 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:06:47,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:06:47,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:06:47,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:06:47,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:06:47,975 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:06:47,979 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:06:47,979 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:06:47,979 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:06:47,980 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:06:47,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:06:47,981 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:06:47,981 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:06:47,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:06:47,982 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:06:47,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:06:47,982 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:06:47,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:06:47,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:06:47,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:06:47,983 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:06:47,984 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:06:47,984 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:06:47,984 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:06:47,985 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:06:47,985 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:06:47,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:06:47,986 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:06:47,987 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:06:47,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:06:47,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:06:47,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:06:47,987 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:06:47,988 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:06:47,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:06:47,988 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:06:47,988 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:06:47,989 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:06:47,989 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:06:47,989 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:06:47,989 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:06:48,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:06:48,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:06:48,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:06:48,278 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:06:48,278 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:06:48,279 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix039.oepc.i [2024-06-21 21:06:49,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:06:49,674 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:06:49,675 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix039.oepc.i [2024-06-21 21:06:49,697 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554382ca5/f9ffe462b4d0494f8dfde838f525b95f/FLAG5b7dbd0f8 [2024-06-21 21:06:49,714 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/554382ca5/f9ffe462b4d0494f8dfde838f525b95f [2024-06-21 21:06:49,717 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:06:49,717 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:06:49,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix039.oepc.yml/witness.yml [2024-06-21 21:06:49,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:06:49,989 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:06:49,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:06:49,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:06:49,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:06:49,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:06:49" (1/2) ... [2024-06-21 21:06:49,998 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8212a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:06:49, skipping insertion in model container [2024-06-21 21:06:49,998 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:06:49" (1/2) ... [2024-06-21 21:06:50,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@368dcc97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:06:49, skipping insertion in model container [2024-06-21 21:06:50,000 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:06:49" (2/2) ... [2024-06-21 21:06:50,001 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8212a3e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50, skipping insertion in model container [2024-06-21 21:06:50,001 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:06:49" (2/2) ... [2024-06-21 21:06:50,001 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:06:50,134 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:06:50,136 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff0_thd4 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$r_buff1_thd4 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__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)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:06:50,136 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff0_thd4 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$r_buff1_thd4 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:06:50,137 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] (((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff0_thd4 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$r_buff1_thd4 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__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)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:06:50,137 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff0_thd4 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$r_buff1_thd4 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (z == 0 || z == 1)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:06:50,137 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:06:50,138 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-21 21:06:50,177 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:06:50,488 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:06:50,506 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 21:06:50,679 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:06:50,738 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:06:50,738 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50 WrapperNode [2024-06-21 21:06:50,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:06:50,740 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:06:50,740 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:06:50,740 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:06:50,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,815 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 140 [2024-06-21 21:06:50,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:06:50,825 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:06:50,826 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:06:50,826 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:06:50,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,852 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,886 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 21:06:50,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,909 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,915 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,923 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,928 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:06:50,929 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:06:50,929 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:06:50,929 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:06:50,930 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (1/1) ... [2024-06-21 21:06:50,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:06:50,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:06:50,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:06:50,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:06:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:06:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:06:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:06:51,001 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:06:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:06:51,001 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:06:51,001 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:06:51,002 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:06:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:06:51,002 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:06:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:06:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:06:51,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:06:51,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:06:51,005 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:06:51,175 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:06:51,177 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:06:51,584 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:06:51,585 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:06:51,764 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:06:51,764 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:06:51,765 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:06:51 BoogieIcfgContainer [2024-06-21 21:06:51,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:06:51,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:06:51,768 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:06:51,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:06:51,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:06:49" (1/4) ... [2024-06-21 21:06:51,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f671390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:06:51, skipping insertion in model container [2024-06-21 21:06:51,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:06:49" (2/4) ... [2024-06-21 21:06:51,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f671390 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:06:51, skipping insertion in model container [2024-06-21 21:06:51,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:06:50" (3/4) ... [2024-06-21 21:06:51,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f671390 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:06:51, skipping insertion in model container [2024-06-21 21:06:51,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:06:51" (4/4) ... [2024-06-21 21:06:51,774 INFO L112 eAbstractionObserver]: Analyzing ICFG mix039.oepc.i [2024-06-21 21:06:51,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:06:51,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:06:51,813 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:06:51,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:06:51,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 21:06:51,964 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 21:06:51,965 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:06:51,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:06:51,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 21:06:51,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 21:06:51,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:06:51,995 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;@64db9be6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:06:51,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:06:51,999 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:06:51,999 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:06:51,999 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:06:52,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:52,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:06:52,001 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 21:06:52,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:52,005 INFO L85 PathProgramCache]: Analyzing trace with hash 407834173, now seen corresponding path program 1 times [2024-06-21 21:06:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10425022] [2024-06-21 21:06:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:53,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:53,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10425022] [2024-06-21 21:06:53,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10425022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:53,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:53,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:06:53,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584510378] [2024-06-21 21:06:53,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:53,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:06:53,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:06:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:06:53,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:06:53,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:53,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:53,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:06:53,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:55,665 INFO L124 PetriNetUnfolderBase]: 10978/15306 cut-off events. [2024-06-21 21:06:55,666 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-21 21:06:55,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30549 conditions, 15306 events. 10978/15306 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 84523 event pairs, 8484 based on Foata normal form. 1/14972 useless extension candidates. Maximal degree in co-relation 30536. Up to 14854 conditions per place. [2024-06-21 21:06:55,776 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 21:06:55,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-21 21:06:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:06:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:06:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-21 21:06:55,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163522012578616 [2024-06-21 21:06:55,790 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 98 transitions. [2024-06-21 21:06:55,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-21 21:06:55,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:55,799 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 21:06:55,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 21:06:55,804 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 21:06:55,804 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 21:06:55,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:55,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:55,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:55,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:06:55,806 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 21:06:55,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:55,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1086673948, now seen corresponding path program 1 times [2024-06-21 21:06:55,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:55,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605970278] [2024-06-21 21:06:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:56,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:56,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605970278] [2024-06-21 21:06:56,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605970278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:56,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:56,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:06:56,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033274792] [2024-06-21 21:06:56,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:56,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:06:56,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:56,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:06:56,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:06:56,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:06:56,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:56,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:56,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:06:56,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:58,893 INFO L124 PetriNetUnfolderBase]: 10968/15292 cut-off events. [2024-06-21 21:06:58,893 INFO L125 PetriNetUnfolderBase]: For 2797/2797 co-relation queries the response was YES. [2024-06-21 21:06:58,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34380 conditions, 15292 events. 10968/15292 cut-off events. For 2797/2797 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 84396 event pairs, 7575 based on Foata normal form. 4/15143 useless extension candidates. Maximal degree in co-relation 34368. Up to 14819 conditions per place. [2024-06-21 21:06:58,974 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 21:06:58,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-21 21:06:58,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:06:58,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:06:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-21 21:06:58,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-21 21:06:58,978 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-21 21:06:58,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-21 21:06:58,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:06:58,983 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 21:06:58,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 21:06:58,984 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 21:06:58,984 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 21:06:58,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:58,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:58,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:58,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:06:58,988 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 21:06:58,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:58,994 INFO L85 PathProgramCache]: Analyzing trace with hash 616670715, now seen corresponding path program 1 times [2024-06-21 21:06:58,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:58,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611746913] [2024-06-21 21:06:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:58,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:00,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611746913] [2024-06-21 21:07:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611746913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:00,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:00,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:07:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036636813] [2024-06-21 21:07:00,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:00,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:07:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:07:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:07:00,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:07:00,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 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 21:07:00,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:00,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:07:00,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:02,798 INFO L124 PetriNetUnfolderBase]: 13301/18473 cut-off events. [2024-06-21 21:07:02,799 INFO L125 PetriNetUnfolderBase]: For 9253/9253 co-relation queries the response was YES. [2024-06-21 21:07:02,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45792 conditions, 18473 events. 13301/18473 cut-off events. For 9253/9253 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 102464 event pairs, 7801 based on Foata normal form. 4/18294 useless extension candidates. Maximal degree in co-relation 45778. Up to 17880 conditions per place. [2024-06-21 21:07:02,920 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 75 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-21 21:07:02,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 512 flow [2024-06-21 21:07:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:07:02,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:07:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-21 21:07:02,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-21 21:07:02,923 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 180 transitions. [2024-06-21 21:07:02,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 512 flow [2024-06-21 21:07:02,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 484 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 21:07:02,927 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-21 21:07:02,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-21 21:07:02,929 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 21:07:02,929 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-21 21:07:02,929 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 21:07:02,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:02,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:02,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:07:02,930 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 21:07:02,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash 216202615, now seen corresponding path program 1 times [2024-06-21 21:07:02,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:02,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895018845] [2024-06-21 21:07:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:02,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895018845] [2024-06-21 21:07:04,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895018845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:04,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:04,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:07:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077338254] [2024-06-21 21:07:04,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:04,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:07:04,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:07:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:07:04,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:07:04,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 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 21:07:04,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:04,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:07:04,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:06,684 INFO L124 PetriNetUnfolderBase]: 13285/18453 cut-off events. [2024-06-21 21:07:06,685 INFO L125 PetriNetUnfolderBase]: For 18739/18739 co-relation queries the response was YES. [2024-06-21 21:07:06,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50882 conditions, 18453 events. 13285/18453 cut-off events. For 18739/18739 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 102075 event pairs, 6762 based on Foata normal form. 8/18278 useless extension candidates. Maximal degree in co-relation 50866. Up to 17814 conditions per place. [2024-06-21 21:07:06,777 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-21 21:07:06,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 602 flow [2024-06-21 21:07:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:07:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:07:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-21 21:07:06,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498652291105122 [2024-06-21 21:07:06,780 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 204 transitions. [2024-06-21 21:07:06,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 602 flow [2024-06-21 21:07:06,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 563 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:07:06,790 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-21 21:07:06,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 21:07:06,791 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-21 21:07:06,791 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-21 21:07:06,791 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 21:07:06,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:06,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:06,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:07:06,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:07:06,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:06,793 INFO L85 PathProgramCache]: Analyzing trace with hash 675725916, now seen corresponding path program 1 times [2024-06-21 21:07:06,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:06,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019699784] [2024-06-21 21:07:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:06,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:07,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019699784] [2024-06-21 21:07:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019699784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:07,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:07,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:07:07,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017700620] [2024-06-21 21:07:07,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:07,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:07:07,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:07:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:07:07,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:07,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 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 21:07:07,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:07,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:07,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:09,329 INFO L124 PetriNetUnfolderBase]: 13276/18469 cut-off events. [2024-06-21 21:07:09,329 INFO L125 PetriNetUnfolderBase]: For 29272/29272 co-relation queries the response was YES. [2024-06-21 21:07:09,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54459 conditions, 18469 events. 13276/18469 cut-off events. For 29272/29272 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 102505 event pairs, 7377 based on Foata normal form. 3/18289 useless extension candidates. Maximal degree in co-relation 54441. Up to 17892 conditions per place. [2024-06-21 21:07:09,443 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 66 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-21 21:07:09,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 513 flow [2024-06-21 21:07:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:07:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:07:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-21 21:07:09,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-21 21:07:09,446 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 124 transitions. [2024-06-21 21:07:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 513 flow [2024-06-21 21:07:09,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 459 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:09,454 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-21 21:07:09,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 21:07:09,455 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-21 21:07:09,455 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-21 21:07:09,455 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 21:07:09,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:09,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:09,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:07:09,456 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 21:07:09,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash -527331636, now seen corresponding path program 1 times [2024-06-21 21:07:09,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:09,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177361376] [2024-06-21 21:07:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:09,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:10,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:10,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177361376] [2024-06-21 21:07:10,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177361376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:10,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:10,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:07:10,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581934480] [2024-06-21 21:07:10,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:10,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:07:10,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:07:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:07:10,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:10,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 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 21:07:10,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:10,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:10,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:12,460 INFO L124 PetriNetUnfolderBase]: 13342/18684 cut-off events. [2024-06-21 21:07:12,460 INFO L125 PetriNetUnfolderBase]: For 42649/42649 co-relation queries the response was YES. [2024-06-21 21:07:12,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59015 conditions, 18684 events. 13342/18684 cut-off events. For 42649/42649 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 104626 event pairs, 6995 based on Foata normal form. 14/18663 useless extension candidates. Maximal degree in co-relation 58995. Up to 17768 conditions per place. [2024-06-21 21:07:12,570 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 84 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-21 21:07:12,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 724 flow [2024-06-21 21:07:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:07:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:07:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 21:07:12,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-21 21:07:12,573 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 160 transitions. [2024-06-21 21:07:12,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 724 flow [2024-06-21 21:07:12,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 691 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:07:12,582 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 449 flow [2024-06-21 21:07:12,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-21 21:07:12,583 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-21 21:07:12,583 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 449 flow [2024-06-21 21:07:12,584 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 21:07:12,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:12,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:12,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:07:12,584 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 21:07:12,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:12,585 INFO L85 PathProgramCache]: Analyzing trace with hash 252644813, now seen corresponding path program 1 times [2024-06-21 21:07:12,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:12,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943480687] [2024-06-21 21:07:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:12,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:13,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943480687] [2024-06-21 21:07:13,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943480687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:13,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:13,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:07:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451225100] [2024-06-21 21:07:13,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:07:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:07:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:07:13,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:13,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 449 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 21:07:13,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:13,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:13,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:15,993 INFO L124 PetriNetUnfolderBase]: 13364/18747 cut-off events. [2024-06-21 21:07:15,994 INFO L125 PetriNetUnfolderBase]: For 62845/62855 co-relation queries the response was YES. [2024-06-21 21:07:16,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66207 conditions, 18747 events. 13364/18747 cut-off events. For 62845/62855 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 105540 event pairs, 7048 based on Foata normal form. 11/18725 useless extension candidates. Maximal degree in co-relation 66184. Up to 17956 conditions per place. [2024-06-21 21:07:16,144 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 90 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-06-21 21:07:16,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 859 flow [2024-06-21 21:07:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:07:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:07:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 21:07:16,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-21 21:07:16,146 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 449 flow. Second operand 6 states and 155 transitions. [2024-06-21 21:07:16,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 859 flow [2024-06-21 21:07:16,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 833 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-21 21:07:16,168 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 560 flow [2024-06-21 21:07:16,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=560, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2024-06-21 21:07:16,169 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-21 21:07:16,169 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 560 flow [2024-06-21 21:07:16,169 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 21:07:16,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:16,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:16,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:07:16,170 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 21:07:16,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1520379321, now seen corresponding path program 2 times [2024-06-21 21:07:16,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:16,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509623956] [2024-06-21 21:07:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:16,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:17,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:17,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509623956] [2024-06-21 21:07:17,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509623956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:17,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:17,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:07:17,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119310255] [2024-06-21 21:07:17,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:17,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:07:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:07:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:07:17,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:17,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 560 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 21:07:17,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:17,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:17,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:19,047 INFO L124 PetriNetUnfolderBase]: 13355/18733 cut-off events. [2024-06-21 21:07:19,047 INFO L125 PetriNetUnfolderBase]: For 80983/80983 co-relation queries the response was YES. [2024-06-21 21:07:19,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70309 conditions, 18733 events. 13355/18733 cut-off events. For 80983/80983 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 105521 event pairs, 7041 based on Foata normal form. 3/18704 useless extension candidates. Maximal degree in co-relation 70283. Up to 17983 conditions per place. [2024-06-21 21:07:19,152 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 91 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-21 21:07:19,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 832 flow [2024-06-21 21:07:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:07:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:07:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 21:07:19,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-21 21:07:19,154 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 560 flow. Second operand 6 states and 147 transitions. [2024-06-21 21:07:19,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 832 flow [2024-06-21 21:07:19,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 766 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-21 21:07:19,210 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 533 flow [2024-06-21 21:07:19,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=533, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-21 21:07:19,211 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-21 21:07:19,212 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 533 flow [2024-06-21 21:07:19,212 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 21:07:19,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:19,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:19,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:07:19,212 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 21:07:19,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:19,213 INFO L85 PathProgramCache]: Analyzing trace with hash -137011663, now seen corresponding path program 1 times [2024-06-21 21:07:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:19,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926205993] [2024-06-21 21:07:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:19,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:20,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:20,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926205993] [2024-06-21 21:07:20,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926205993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:20,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:20,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:07:20,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122583778] [2024-06-21 21:07:20,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:20,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:07:20,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:07:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:07:20,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:20,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 533 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 21:07:20,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:20,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:20,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:22,548 INFO L124 PetriNetUnfolderBase]: 13377/18773 cut-off events. [2024-06-21 21:07:22,548 INFO L125 PetriNetUnfolderBase]: For 90071/90071 co-relation queries the response was YES. [2024-06-21 21:07:22,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71138 conditions, 18773 events. 13377/18773 cut-off events. For 90071/90071 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 105760 event pairs, 6887 based on Foata normal form. 3/18751 useless extension candidates. Maximal degree in co-relation 71110. Up to 17986 conditions per place. [2024-06-21 21:07:22,682 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 104 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-06-21 21:07:22,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 917 flow [2024-06-21 21:07:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:07:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:07:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:07:22,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-21 21:07:22,684 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 533 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:07:22,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 917 flow [2024-06-21 21:07:22,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 873 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:22,720 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 588 flow [2024-06-21 21:07:22,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-21 21:07:22,721 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-21 21:07:22,721 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 588 flow [2024-06-21 21:07:22,721 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 21:07:22,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:22,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:22,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:07:22,722 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 21:07:22,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:22,722 INFO L85 PathProgramCache]: Analyzing trace with hash -136891507, now seen corresponding path program 1 times [2024-06-21 21:07:22,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937303770] [2024-06-21 21:07:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:23,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:23,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937303770] [2024-06-21 21:07:23,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937303770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:23,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:23,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:07:23,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439288120] [2024-06-21 21:07:23,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:23,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:07:23,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:07:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:07:24,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:24,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 588 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 21:07:24,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:24,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:24,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:25,838 INFO L124 PetriNetUnfolderBase]: 13789/19273 cut-off events. [2024-06-21 21:07:25,839 INFO L125 PetriNetUnfolderBase]: For 115486/115490 co-relation queries the response was YES. [2024-06-21 21:07:25,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77639 conditions, 19273 events. 13789/19273 cut-off events. For 115486/115490 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 107645 event pairs, 6281 based on Foata normal form. 15/19252 useless extension candidates. Maximal degree in co-relation 77611. Up to 18064 conditions per place. [2024-06-21 21:07:25,980 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 123 selfloop transitions, 37 changer transitions 0/166 dead transitions. [2024-06-21 21:07:25,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 166 transitions, 1396 flow [2024-06-21 21:07:25,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:07:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:07:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 21:07:25,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2024-06-21 21:07:25,982 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 588 flow. Second operand 7 states and 195 transitions. [2024-06-21 21:07:25,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 166 transitions, 1396 flow [2024-06-21 21:07:26,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 166 transitions, 1329 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:26,030 INFO L231 Difference]: Finished difference. Result has 86 places, 114 transitions, 869 flow [2024-06-21 21:07:26,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=869, PETRI_PLACES=86, PETRI_TRANSITIONS=114} [2024-06-21 21:07:26,031 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-21 21:07:26,031 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 114 transitions, 869 flow [2024-06-21 21:07:26,032 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 21:07:26,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:26,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:26,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:07:26,032 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 21:07:26,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:26,033 INFO L85 PathProgramCache]: Analyzing trace with hash -828037023, now seen corresponding path program 2 times [2024-06-21 21:07:26,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:26,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760538169] [2024-06-21 21:07:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:27,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:27,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760538169] [2024-06-21 21:07:27,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760538169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:27,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:27,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:07:27,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557507609] [2024-06-21 21:07:27,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:27,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:07:27,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:07:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:07:27,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:27,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 114 transitions, 869 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 21:07:27,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:27,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:27,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:29,190 INFO L124 PetriNetUnfolderBase]: 13811/19351 cut-off events. [2024-06-21 21:07:29,191 INFO L125 PetriNetUnfolderBase]: For 149947/149957 co-relation queries the response was YES. [2024-06-21 21:07:29,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87203 conditions, 19351 events. 13811/19351 cut-off events. For 149947/149957 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 108179 event pairs, 6571 based on Foata normal form. 11/19326 useless extension candidates. Maximal degree in co-relation 87171. Up to 18482 conditions per place. [2024-06-21 21:07:29,316 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 118 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-06-21 21:07:29,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1445 flow [2024-06-21 21:07:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:07:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:07:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 21:07:29,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-21 21:07:29,318 INFO L175 Difference]: Start difference. First operand has 86 places, 114 transitions, 869 flow. Second operand 7 states and 180 transitions. [2024-06-21 21:07:29,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1445 flow [2024-06-21 21:07:29,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1389 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-21 21:07:29,386 INFO L231 Difference]: Finished difference. Result has 92 places, 122 transitions, 1018 flow [2024-06-21 21:07:29,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1018, PETRI_PLACES=92, PETRI_TRANSITIONS=122} [2024-06-21 21:07:29,387 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-21 21:07:29,387 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 122 transitions, 1018 flow [2024-06-21 21:07:29,387 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 21:07:29,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:29,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:29,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:07:29,388 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 21:07:29,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -112879857, now seen corresponding path program 2 times [2024-06-21 21:07:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461554897] [2024-06-21 21:07:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:29,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:30,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461554897] [2024-06-21 21:07:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461554897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:30,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:30,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:07:30,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416124814] [2024-06-21 21:07:30,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:30,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:07:30,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:07:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:07:30,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:30,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 122 transitions, 1018 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 21:07:30,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:30,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:30,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:32,591 INFO L124 PetriNetUnfolderBase]: 13939/19508 cut-off events. [2024-06-21 21:07:32,591 INFO L125 PetriNetUnfolderBase]: For 180906/180916 co-relation queries the response was YES. [2024-06-21 21:07:32,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92062 conditions, 19508 events. 13939/19508 cut-off events. For 180906/180916 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 109149 event pairs, 6546 based on Foata normal form. 24/19494 useless extension candidates. Maximal degree in co-relation 92027. Up to 18445 conditions per place. [2024-06-21 21:07:32,736 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 142 selfloop transitions, 30 changer transitions 0/178 dead transitions. [2024-06-21 21:07:32,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1784 flow [2024-06-21 21:07:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:07:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:07:32,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 21:07:32,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-21 21:07:32,738 INFO L175 Difference]: Start difference. First operand has 92 places, 122 transitions, 1018 flow. Second operand 7 states and 187 transitions. [2024-06-21 21:07:32,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1784 flow [2024-06-21 21:07:32,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 178 transitions, 1708 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 21:07:32,866 INFO L231 Difference]: Finished difference. Result has 98 places, 133 transitions, 1169 flow [2024-06-21 21:07:32,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1169, PETRI_PLACES=98, PETRI_TRANSITIONS=133} [2024-06-21 21:07:32,867 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-21 21:07:32,867 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 133 transitions, 1169 flow [2024-06-21 21:07:32,868 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 21:07:32,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:32,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:32,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:07:32,868 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 21:07:32,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -88360681, now seen corresponding path program 3 times [2024-06-21 21:07:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:32,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018451298] [2024-06-21 21:07:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:33,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:33,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018451298] [2024-06-21 21:07:33,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018451298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:33,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:33,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:07:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800026748] [2024-06-21 21:07:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:33,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:07:33,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:07:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:07:33,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:33,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 133 transitions, 1169 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 21:07:33,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:33,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:33,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:36,313 INFO L124 PetriNetUnfolderBase]: 14005/19601 cut-off events. [2024-06-21 21:07:36,313 INFO L125 PetriNetUnfolderBase]: For 210160/210160 co-relation queries the response was YES. [2024-06-21 21:07:36,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96106 conditions, 19601 events. 14005/19601 cut-off events. For 210160/210160 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 109591 event pairs, 6560 based on Foata normal form. 14/19577 useless extension candidates. Maximal degree in co-relation 96067. Up to 18715 conditions per place. [2024-06-21 21:07:36,731 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 146 selfloop transitions, 27 changer transitions 0/179 dead transitions. [2024-06-21 21:07:36,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 1807 flow [2024-06-21 21:07:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:07:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:07:36,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 21:07:36,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-21 21:07:36,732 INFO L175 Difference]: Start difference. First operand has 98 places, 133 transitions, 1169 flow. Second operand 7 states and 181 transitions. [2024-06-21 21:07:36,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 1807 flow [2024-06-21 21:07:36,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 179 transitions, 1749 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-21 21:07:36,849 INFO L231 Difference]: Finished difference. Result has 105 places, 142 transitions, 1309 flow [2024-06-21 21:07:36,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=105, PETRI_TRANSITIONS=142} [2024-06-21 21:07:36,850 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-21 21:07:36,850 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 142 transitions, 1309 flow [2024-06-21 21:07:36,850 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 21:07:36,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:36,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:36,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:07:36,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:07:36,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 40239827, now seen corresponding path program 3 times [2024-06-21 21:07:36,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:36,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601093623] [2024-06-21 21:07:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:36,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:37,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:37,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601093623] [2024-06-21 21:07:37,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601093623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:37,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:37,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:07:37,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712502235] [2024-06-21 21:07:37,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:37,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:07:37,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:37,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:07:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:07:37,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:37,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 142 transitions, 1309 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 21:07:37,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:37,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:37,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:40,243 INFO L124 PetriNetUnfolderBase]: 13996/19595 cut-off events. [2024-06-21 21:07:40,243 INFO L125 PetriNetUnfolderBase]: For 234384/234384 co-relation queries the response was YES. [2024-06-21 21:07:40,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98590 conditions, 19595 events. 13996/19595 cut-off events. For 234384/234384 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 109477 event pairs, 6594 based on Foata normal form. 3/19563 useless extension candidates. Maximal degree in co-relation 98547. Up to 18820 conditions per place. [2024-06-21 21:07:40,365 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 18 changer transitions 0/173 dead transitions. [2024-06-21 21:07:40,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 173 transitions, 1723 flow [2024-06-21 21:07:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:07:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:07:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 21:07:40,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-21 21:07:40,367 INFO L175 Difference]: Start difference. First operand has 105 places, 142 transitions, 1309 flow. Second operand 7 states and 170 transitions. [2024-06-21 21:07:40,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 173 transitions, 1723 flow [2024-06-21 21:07:40,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 173 transitions, 1613 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 21:07:40,515 INFO L231 Difference]: Finished difference. Result has 108 places, 142 transitions, 1246 flow [2024-06-21 21:07:40,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1246, PETRI_PLACES=108, PETRI_TRANSITIONS=142} [2024-06-21 21:07:40,515 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-21 21:07:40,516 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 142 transitions, 1246 flow [2024-06-21 21:07:40,516 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 21:07:40,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:40,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:40,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:07:40,516 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 21:07:40,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:40,517 INFO L85 PathProgramCache]: Analyzing trace with hash -821361669, now seen corresponding path program 1 times [2024-06-21 21:07:40,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:40,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968251992] [2024-06-21 21:07:40,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:40,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:42,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:42,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968251992] [2024-06-21 21:07:42,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968251992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:42,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:42,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:42,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687353346] [2024-06-21 21:07:42,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:42,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:42,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:42,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:42,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 142 transitions, 1246 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 21:07:42,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:42,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:42,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:45,162 INFO L124 PetriNetUnfolderBase]: 14177/19843 cut-off events. [2024-06-21 21:07:45,162 INFO L125 PetriNetUnfolderBase]: For 255392/255392 co-relation queries the response was YES. [2024-06-21 21:07:45,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100664 conditions, 19843 events. 14177/19843 cut-off events. For 255392/255392 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 110996 event pairs, 6407 based on Foata normal form. 30/19831 useless extension candidates. Maximal degree in co-relation 100620. Up to 18679 conditions per place. [2024-06-21 21:07:45,334 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 149 selfloop transitions, 36 changer transitions 0/191 dead transitions. [2024-06-21 21:07:45,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 191 transitions, 1930 flow [2024-06-21 21:07:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 21:07:45,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740566037735849 [2024-06-21 21:07:45,336 INFO L175 Difference]: Start difference. First operand has 108 places, 142 transitions, 1246 flow. Second operand 8 states and 201 transitions. [2024-06-21 21:07:45,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 191 transitions, 1930 flow [2024-06-21 21:07:45,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 191 transitions, 1866 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:45,524 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1352 flow [2024-06-21 21:07:45,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1352, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-21 21:07:45,525 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-21 21:07:45,525 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1352 flow [2024-06-21 21:07:45,525 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 21:07:45,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:45,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:45,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:07:45,526 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:07:45,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash -826577787, now seen corresponding path program 1 times [2024-06-21 21:07:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:45,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39004665] [2024-06-21 21:07:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:46,298 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 21:07:46,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:46,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39004665] [2024-06-21 21:07:46,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39004665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:46,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:46,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:07:46,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91904570] [2024-06-21 21:07:46,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:07:46,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:07:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:07:46,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 21:07:46,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1352 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:46,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:46,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 21:07:46,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:49,199 INFO L124 PetriNetUnfolderBase]: 13480/19148 cut-off events. [2024-06-21 21:07:49,200 INFO L125 PetriNetUnfolderBase]: For 283341/283341 co-relation queries the response was YES. [2024-06-21 21:07:49,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101065 conditions, 19148 events. 13480/19148 cut-off events. For 283341/283341 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 110319 event pairs, 6569 based on Foata normal form. 4/19114 useless extension candidates. Maximal degree in co-relation 101019. Up to 18087 conditions per place. [2024-06-21 21:07:49,650 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 130 selfloop transitions, 14 changer transitions 0/160 dead transitions. [2024-06-21 21:07:49,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1674 flow [2024-06-21 21:07:49,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:07:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:07:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 21:07:49,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-21 21:07:49,652 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1352 flow. Second operand 5 states and 125 transitions. [2024-06-21 21:07:49,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1674 flow [2024-06-21 21:07:49,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 160 transitions, 1533 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:49,823 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1251 flow [2024-06-21 21:07:49,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1251, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-21 21:07:49,824 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-21 21:07:49,824 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1251 flow [2024-06-21 21:07:49,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:49,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:49,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:07:49,825 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 21:07:49,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:49,825 INFO L85 PathProgramCache]: Analyzing trace with hash -2025239444, now seen corresponding path program 1 times [2024-06-21 21:07:49,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:49,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039802355] [2024-06-21 21:07:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:49,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:51,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039802355] [2024-06-21 21:07:51,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039802355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:51,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:51,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451201805] [2024-06-21 21:07:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:51,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:51,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:51,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:51,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:51,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:51,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1251 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 21:07:51,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:51,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:51,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:54,395 INFO L124 PetriNetUnfolderBase]: 14216/19895 cut-off events. [2024-06-21 21:07:54,395 INFO L125 PetriNetUnfolderBase]: For 304840/304840 co-relation queries the response was YES. [2024-06-21 21:07:54,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105294 conditions, 19895 events. 14216/19895 cut-off events. For 304840/304840 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 111116 event pairs, 6433 based on Foata normal form. 3/19859 useless extension candidates. Maximal degree in co-relation 105247. Up to 19067 conditions per place. [2024-06-21 21:07:54,592 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 174 selfloop transitions, 31 changer transitions 0/211 dead transitions. [2024-06-21 21:07:54,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 211 transitions, 2049 flow [2024-06-21 21:07:54,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:54,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-21 21:07:54,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480083857442348 [2024-06-21 21:07:54,594 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1251 flow. Second operand 9 states and 229 transitions. [2024-06-21 21:07:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 211 transitions, 2049 flow [2024-06-21 21:07:54,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 211 transitions, 2017 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:07:54,795 INFO L231 Difference]: Finished difference. Result has 117 places, 155 transitions, 1444 flow [2024-06-21 21:07:54,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1444, PETRI_PLACES=117, PETRI_TRANSITIONS=155} [2024-06-21 21:07:54,796 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-06-21 21:07:54,796 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 155 transitions, 1444 flow [2024-06-21 21:07:54,796 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 21:07:54,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:54,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:54,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:07:54,797 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 21:07:54,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:54,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2025149079, now seen corresponding path program 1 times [2024-06-21 21:07:54,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:54,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597759056] [2024-06-21 21:07:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:54,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:56,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:56,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597759056] [2024-06-21 21:07:56,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597759056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:56,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:56,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:56,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243334995] [2024-06-21 21:07:56,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:56,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:56,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:56,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:56,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:07:56,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 155 transitions, 1444 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 21:07:56,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:56,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:07:56,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:59,284 INFO L124 PetriNetUnfolderBase]: 14505/20241 cut-off events. [2024-06-21 21:07:59,285 INFO L125 PetriNetUnfolderBase]: For 355458/355458 co-relation queries the response was YES. [2024-06-21 21:07:59,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111871 conditions, 20241 events. 14505/20241 cut-off events. For 355458/355458 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 112982 event pairs, 6262 based on Foata normal form. 14/20183 useless extension candidates. Maximal degree in co-relation 111823. Up to 19239 conditions per place. [2024-06-21 21:07:59,610 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 181 selfloop transitions, 37 changer transitions 0/224 dead transitions. [2024-06-21 21:07:59,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 224 transitions, 2430 flow [2024-06-21 21:07:59,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 21:07:59,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117924528301887 [2024-06-21 21:07:59,612 INFO L175 Difference]: Start difference. First operand has 117 places, 155 transitions, 1444 flow. Second operand 8 states and 217 transitions. [2024-06-21 21:07:59,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 224 transitions, 2430 flow [2024-06-21 21:07:59,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 224 transitions, 2320 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:59,836 INFO L231 Difference]: Finished difference. Result has 122 places, 169 transitions, 1649 flow [2024-06-21 21:07:59,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1649, PETRI_PLACES=122, PETRI_TRANSITIONS=169} [2024-06-21 21:07:59,837 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-21 21:07:59,837 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 169 transitions, 1649 flow [2024-06-21 21:07:59,837 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 21:07:59,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:59,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:59,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:07:59,837 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 21:07:59,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 47607036, now seen corresponding path program 2 times [2024-06-21 21:07:59,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:59,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119983965] [2024-06-21 21:07:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:59,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:01,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:01,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119983965] [2024-06-21 21:08:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119983965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:01,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:01,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:01,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150221646] [2024-06-21 21:08:01,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:01,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:01,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:01,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:08:01,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 169 transitions, 1649 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 21:08:01,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:01,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:08:01,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:04,721 INFO L124 PetriNetUnfolderBase]: 14496/20240 cut-off events. [2024-06-21 21:08:04,721 INFO L125 PetriNetUnfolderBase]: For 408669/408669 co-relation queries the response was YES. [2024-06-21 21:08:04,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118717 conditions, 20240 events. 14496/20240 cut-off events. For 408669/408669 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 113184 event pairs, 6378 based on Foata normal form. 3/20194 useless extension candidates. Maximal degree in co-relation 118665. Up to 19476 conditions per place. [2024-06-21 21:08:04,872 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 183 selfloop transitions, 23 changer transitions 0/212 dead transitions. [2024-06-21 21:08:04,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 212 transitions, 2177 flow [2024-06-21 21:08:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 21:08:04,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-21 21:08:04,877 INFO L175 Difference]: Start difference. First operand has 122 places, 169 transitions, 1649 flow. Second operand 8 states and 199 transitions. [2024-06-21 21:08:04,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 212 transitions, 2177 flow [2024-06-21 21:08:05,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 212 transitions, 1967 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-21 21:08:05,131 INFO L231 Difference]: Finished difference. Result has 126 places, 169 transitions, 1496 flow [2024-06-21 21:08:05,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1496, PETRI_PLACES=126, PETRI_TRANSITIONS=169} [2024-06-21 21:08:05,132 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-21 21:08:05,132 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 169 transitions, 1496 flow [2024-06-21 21:08:05,132 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 21:08:05,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:05,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:05,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:08:05,133 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 21:08:05,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:05,133 INFO L85 PathProgramCache]: Analyzing trace with hash 51331841, now seen corresponding path program 2 times [2024-06-21 21:08:05,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:05,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940695108] [2024-06-21 21:08:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:05,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:06,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:06,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:06,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940695108] [2024-06-21 21:08:06,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940695108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:06,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:06,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:06,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753753472] [2024-06-21 21:08:06,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:06,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:06,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:06,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:08:06,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 169 transitions, 1496 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 21:08:06,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:06,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:08:06,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:10,048 INFO L124 PetriNetUnfolderBase]: 15852/22092 cut-off events. [2024-06-21 21:08:10,048 INFO L125 PetriNetUnfolderBase]: For 459309/459321 co-relation queries the response was YES. [2024-06-21 21:08:10,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130099 conditions, 22092 events. 15852/22092 cut-off events. For 459309/459321 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 124002 event pairs, 6341 based on Foata normal form. 18/22039 useless extension candidates. Maximal degree in co-relation 130046. Up to 19808 conditions per place. [2024-06-21 21:08:10,220 INFO L140 encePairwiseOnDemand]: 36/53 looper letters, 199 selfloop transitions, 89 changer transitions 0/294 dead transitions. [2024-06-21 21:08:10,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 294 transitions, 3403 flow [2024-06-21 21:08:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-21 21:08:10,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989517819706499 [2024-06-21 21:08:10,221 INFO L175 Difference]: Start difference. First operand has 126 places, 169 transitions, 1496 flow. Second operand 9 states and 238 transitions. [2024-06-21 21:08:10,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 294 transitions, 3403 flow [2024-06-21 21:08:10,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 294 transitions, 3321 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:08:10,530 INFO L231 Difference]: Finished difference. Result has 131 places, 227 transitions, 2465 flow [2024-06-21 21:08:10,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2465, PETRI_PLACES=131, PETRI_TRANSITIONS=227} [2024-06-21 21:08:10,530 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-21 21:08:10,531 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 227 transitions, 2465 flow [2024-06-21 21:08:10,531 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 21:08:10,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:10,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:10,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:08:10,531 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 21:08:10,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash 100657356, now seen corresponding path program 3 times [2024-06-21 21:08:10,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:10,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469816897] [2024-06-21 21:08:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:10,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:12,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:12,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469816897] [2024-06-21 21:08:12,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469816897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:12,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:12,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:12,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403372755] [2024-06-21 21:08:12,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:12,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:12,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:12,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:12,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:12,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:08:12,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 227 transitions, 2465 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 21:08:12,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:12,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:08:12,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:15,871 INFO L124 PetriNetUnfolderBase]: 15874/22148 cut-off events. [2024-06-21 21:08:15,871 INFO L125 PetriNetUnfolderBase]: For 535555/535567 co-relation queries the response was YES. [2024-06-21 21:08:15,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139928 conditions, 22148 events. 15874/22148 cut-off events. For 535555/535567 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 124605 event pairs, 6566 based on Foata normal form. 13/22111 useless extension candidates. Maximal degree in co-relation 139871. Up to 21151 conditions per place. [2024-06-21 21:08:16,033 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 212 selfloop transitions, 53 changer transitions 0/271 dead transitions. [2024-06-21 21:08:16,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 271 transitions, 3195 flow [2024-06-21 21:08:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 21:08:16,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-21 21:08:16,034 INFO L175 Difference]: Start difference. First operand has 131 places, 227 transitions, 2465 flow. Second operand 8 states and 200 transitions. [2024-06-21 21:08:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 271 transitions, 3195 flow [2024-06-21 21:08:16,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 271 transitions, 3078 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-21 21:08:16,384 INFO L231 Difference]: Finished difference. Result has 137 places, 231 transitions, 2568 flow [2024-06-21 21:08:16,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2348, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2568, PETRI_PLACES=137, PETRI_TRANSITIONS=231} [2024-06-21 21:08:16,385 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-21 21:08:16,385 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 231 transitions, 2568 flow [2024-06-21 21:08:16,385 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 21:08:16,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:16,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:16,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:08:16,386 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 21:08:16,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:16,386 INFO L85 PathProgramCache]: Analyzing trace with hash 51326261, now seen corresponding path program 3 times [2024-06-21 21:08:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:16,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043517498] [2024-06-21 21:08:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:16,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:17,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:17,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043517498] [2024-06-21 21:08:17,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043517498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:17,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:17,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:17,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756905780] [2024-06-21 21:08:17,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:17,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:17,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:17,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:17,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:08:17,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 231 transitions, 2568 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 21:08:17,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:17,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:08:17,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand