./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix023_tso.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/protection/mix023_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix023_tso.i ./goblint.2024-06-19_11-23-25.files/protection/mix023_tso.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-7724a2d-m [2024-06-27 20:10:18,684 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:10:18,734 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:10:18,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:10:18,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:10:18,759 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:10:18,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:10:18,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:10:18,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:10:18,761 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:10:18,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:10:18,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:10:18,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:10:18,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:10:18,763 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:10:18,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:10:18,764 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:10:18,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:10:18,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:10:18,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:10:18,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:10:18,772 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:10:18,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:10:18,772 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:10:18,772 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:10:18,772 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:10:18,773 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:10:18,773 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:10:18,773 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:10:18,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:10:18,774 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:10:18,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:10:18,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:10:18,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:10:18,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:10:18,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:10:18,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:10:18,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:10:18,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:10:18,775 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:10:18,776 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:10:18,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:10:18,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:10:18,777 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:10:19,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:10:19,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:10:19,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:10:19,039 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:10:19,040 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:10:19,041 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix023_tso.yml/witness.yml [2024-06-27 20:10:19,346 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:10:19,347 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:10:19,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix023_tso.i [2024-06-27 20:10:20,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:10:20,757 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:10:20,780 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix023_tso.i [2024-06-27 20:10:20,803 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d659cece0/28f6df70e4e94d71b4d26fbde06263c1/FLAGb340ced71 [2024-06-27 20:10:20,814 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d659cece0/28f6df70e4e94d71b4d26fbde06263c1 [2024-06-27 20:10:20,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:10:20,816 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:10:20,817 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:10:20,817 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:10:20,822 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:10:20,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:19" (1/2) ... [2024-06-27 20:10:20,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42246074 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:20, skipping insertion in model container [2024-06-27 20:10:20,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:19" (1/2) ... [2024-06-27 20:10:20,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ed0697b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:10:20, skipping insertion in model container [2024-06-27 20:10:20,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:10:20" (2/2) ... [2024-06-27 20:10:20,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42246074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:20, skipping insertion in model container [2024-06-27 20:10:20,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:10:20" (2/2) ... [2024-06-27 20:10:20,825 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:10:21,041 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:10:21,043 INFO L97 edCorrectnessWitness]: Location invariant before [L928-L928] ((((((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) [2024-06-27 20:10:21,043 INFO L97 edCorrectnessWitness]: Location invariant before [L923-L923] ((((((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) [2024-06-27 20:10:21,043 INFO L97 edCorrectnessWitness]: Location invariant before [L925-L925] ((((((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) [2024-06-27 20:10:21,043 INFO L97 edCorrectnessWitness]: Location invariant before [L927-L927] ((((((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) [2024-06-27 20:10:21,043 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:10:21,044 INFO L106 edCorrectnessWitness]: ghost_update [L921-L921] multithreaded = 1; [2024-06-27 20:10:21,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:10:21,529 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:10:21,540 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:10:21,688 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:10:21,734 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:10:21,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21 WrapperNode [2024-06-27 20:10:21,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:10:21,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:10:21,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:10:21,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:10:21,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,852 INFO L138 Inliner]: procedures = 176, calls = 57, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 286 [2024-06-27 20:10:21,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:10:21,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:10:21,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:10:21,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:10:21,865 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,880 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,915 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]. [2024-06-27 20:10:21,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,916 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,934 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,971 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:10:21,972 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:10:21,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:10:21,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:10:21,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (1/1) ... [2024-06-27 20:10:21,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:10:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:10:22,005 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) [2024-06-27 20:10:22,031 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 [2024-06-27 20:10:22,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:10:22,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:10:22,048 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:10:22,049 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:10:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:10:22,049 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:10:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:10:22,049 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:10:22,049 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:10:22,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:10:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:10:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:10:22,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:10:22,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:10:22,055 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:10:22,223 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:10:22,225 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:10:22,762 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:10:22,762 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:10:23,109 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:10:23,109 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:10:23,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:10:23 BoogieIcfgContainer [2024-06-27 20:10:23,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:10:23,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:10:23,114 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:10:23,117 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:10:23,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:10:19" (1/4) ... [2024-06-27 20:10:23,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5319bd4a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:10:23, skipping insertion in model container [2024-06-27 20:10:23,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:10:20" (2/4) ... [2024-06-27 20:10:23,118 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5319bd4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:10:23, skipping insertion in model container [2024-06-27 20:10:23,118 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:10:21" (3/4) ... [2024-06-27 20:10:23,119 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5319bd4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:10:23, skipping insertion in model container [2024-06-27 20:10:23,119 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:10:23" (4/4) ... [2024-06-27 20:10:23,120 INFO L112 eAbstractionObserver]: Analyzing ICFG mix023_tso.i [2024-06-27 20:10:23,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:10:23,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:10:23,137 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:10:23,215 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:10:23,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:10:23,292 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-27 20:10:23,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:10:23,294 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 90 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. [2024-06-27 20:10:23,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:10:23,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-27 20:10:23,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:10:23,319 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;@2ba4c105, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:10:23,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:10:23,325 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:10:23,325 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:10:23,325 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:10:23,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:23,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:10:23,327 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)] === [2024-06-27 20:10:23,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:23,332 INFO L85 PathProgramCache]: Analyzing trace with hash 625455698, now seen corresponding path program 1 times [2024-06-27 20:10:23,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:23,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16394831] [2024-06-27 20:10:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:23,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:25,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:25,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16394831] [2024-06-27 20:10:25,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16394831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:25,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:25,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:10:25,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338976853] [2024-06-27 20:10:25,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:25,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:10:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:25,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:10:25,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:10:25,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-27 20:10:25,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:25,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:25,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-27 20:10:25,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:28,936 INFO L124 PetriNetUnfolderBase]: 14075/19405 cut-off events. [2024-06-27 20:10:28,937 INFO L125 PetriNetUnfolderBase]: For 256/256 co-relation queries the response was YES. [2024-06-27 20:10:28,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38921 conditions, 19405 events. 14075/19405 cut-off events. For 256/256 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 107023 event pairs, 11070 based on Foata normal form. 1/18891 useless extension candidates. Maximal degree in co-relation 38908. Up to 18981 conditions per place. [2024-06-27 20:10:29,061 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 45 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 20:10:29,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 235 flow [2024-06-27 20:10:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:10:29,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:10:29,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 20:10:29,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-27 20:10:29,074 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 93 transitions. [2024-06-27 20:10:29,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 235 flow [2024-06-27 20:10:29,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:29,080 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-27 20:10:29,082 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} [2024-06-27 20:10:29,085 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-27 20:10:29,085 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-27 20:10:29,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:29,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:29,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:29,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:10:29,086 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)] === [2024-06-27 20:10:29,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash -232192257, now seen corresponding path program 1 times [2024-06-27 20:10:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596804384] [2024-06-27 20:10:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:29,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596804384] [2024-06-27 20:10:30,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596804384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:30,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:30,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:10:30,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316898355] [2024-06-27 20:10:30,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:30,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:10:30,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:10:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:10:30,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:10:30,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:30,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:30,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:10:30,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:34,077 INFO L124 PetriNetUnfolderBase]: 16117/21731 cut-off events. [2024-06-27 20:10:34,078 INFO L125 PetriNetUnfolderBase]: For 3947/3947 co-relation queries the response was YES. [2024-06-27 20:10:34,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49104 conditions, 21731 events. 16117/21731 cut-off events. For 3947/3947 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 114951 event pairs, 11693 based on Foata normal form. 4/21727 useless extension candidates. Maximal degree in co-relation 49092. Up to 21646 conditions per place. [2024-06-27 20:10:34,173 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 56 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 20:10:34,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 329 flow [2024-06-27 20:10:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:10:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:10:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 20:10:34,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518867924528302 [2024-06-27 20:10:34,178 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 117 transitions. [2024-06-27 20:10:34,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 329 flow [2024-06-27 20:10:34,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:10:34,191 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-27 20:10:34,191 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} [2024-06-27 20:10:34,192 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-27 20:10:34,193 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-27 20:10:34,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:34,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:34,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:34,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:10:34,196 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)] === [2024-06-27 20:10:34,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1391976059, now seen corresponding path program 1 times [2024-06-27 20:10:34,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:34,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882111155] [2024-06-27 20:10:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:36,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:36,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882111155] [2024-06-27 20:10:36,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882111155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:36,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:36,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:10:36,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166971810] [2024-06-27 20:10:36,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:36,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:10:36,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:10:36,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:10:36,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:10:36,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:36,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:36,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:10:36,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:38,988 INFO L124 PetriNetUnfolderBase]: 16097/21705 cut-off events. [2024-06-27 20:10:38,988 INFO L125 PetriNetUnfolderBase]: For 11213/11213 co-relation queries the response was YES. [2024-06-27 20:10:39,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54169 conditions, 21705 events. 16097/21705 cut-off events. For 11213/11213 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 115178 event pairs, 9531 based on Foata normal form. 8/21707 useless extension candidates. Maximal degree in co-relation 54155. Up to 21576 conditions per place. [2024-06-27 20:10:39,091 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 67 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-27 20:10:39,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 441 flow [2024-06-27 20:10:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:10:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:10:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-27 20:10:39,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433962264150943 [2024-06-27 20:10:39,096 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 144 transitions. [2024-06-27 20:10:39,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 441 flow [2024-06-27 20:10:39,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 422 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:10:39,102 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 229 flow [2024-06-27 20:10:39,102 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=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 20:10:39,103 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-06-27 20:10:39,104 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 229 flow [2024-06-27 20:10:39,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:39,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:39,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:39,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:10:39,105 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)] === [2024-06-27 20:10:39,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1480692920, now seen corresponding path program 1 times [2024-06-27 20:10:39,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:39,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928574408] [2024-06-27 20:10:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:41,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:41,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928574408] [2024-06-27 20:10:41,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928574408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:41,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:41,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:41,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866473752] [2024-06-27 20:10:41,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:41,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:42,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:10:42,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:42,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:42,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:10:42,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:44,698 INFO L124 PetriNetUnfolderBase]: 16081/21679 cut-off events. [2024-06-27 20:10:44,698 INFO L125 PetriNetUnfolderBase]: For 21720/21720 co-relation queries the response was YES. [2024-06-27 20:10:44,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59193 conditions, 21679 events. 16081/21679 cut-off events. For 21720/21720 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 114830 event pairs, 8286 based on Foata normal form. 8/21679 useless extension candidates. Maximal degree in co-relation 59178. Up to 21510 conditions per place. [2024-06-27 20:10:44,788 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 74 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-27 20:10:44,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 96 transitions, 525 flow [2024-06-27 20:10:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 20:10:44,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220125786163522 [2024-06-27 20:10:44,790 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 229 flow. Second operand 6 states and 166 transitions. [2024-06-27 20:10:44,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 96 transitions, 525 flow [2024-06-27 20:10:44,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 492 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:44,795 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 260 flow [2024-06-27 20:10:44,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-27 20:10:44,796 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-27 20:10:44,797 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 260 flow [2024-06-27 20:10:44,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:44,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:44,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:44,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:10:44,798 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)] === [2024-06-27 20:10:44,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:44,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2114344531, now seen corresponding path program 1 times [2024-06-27 20:10:44,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:44,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387990154] [2024-06-27 20:10:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:44,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:46,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:46,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387990154] [2024-06-27 20:10:46,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387990154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:46,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:46,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:10:46,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906135061] [2024-06-27 20:10:46,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:46,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:10:46,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:10:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:10:46,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:10:46,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:46,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:46,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:10:46,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:48,893 INFO L124 PetriNetUnfolderBase]: 14020/19327 cut-off events. [2024-06-27 20:10:48,893 INFO L125 PetriNetUnfolderBase]: For 28956/28956 co-relation queries the response was YES. [2024-06-27 20:10:48,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56155 conditions, 19327 events. 14020/19327 cut-off events. For 28956/28956 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 106555 event pairs, 8568 based on Foata normal form. 3/19076 useless extension candidates. Maximal degree in co-relation 56138. Up to 18888 conditions per place. [2024-06-27 20:10:49,015 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 62 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-27 20:10:49,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 474 flow [2024-06-27 20:10:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:10:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:10:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 20:10:49,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2024-06-27 20:10:49,017 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 260 flow. Second operand 5 states and 119 transitions. [2024-06-27 20:10:49,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 474 flow [2024-06-27 20:10:49,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 428 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:49,032 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 279 flow [2024-06-27 20:10:49,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 20:10:49,033 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-27 20:10:49,033 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 279 flow [2024-06-27 20:10:49,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:49,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:49,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:49,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:10:49,034 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)] === [2024-06-27 20:10:49,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:49,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1085313421, now seen corresponding path program 1 times [2024-06-27 20:10:49,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:49,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686765421] [2024-06-27 20:10:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:49,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686765421] [2024-06-27 20:10:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686765421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:51,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:51,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:51,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048185402] [2024-06-27 20:10:51,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:51,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:51,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:51,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:51,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:51,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:10:51,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:51,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:51,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:10:51,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:54,025 INFO L124 PetriNetUnfolderBase]: 14011/19315 cut-off events. [2024-06-27 20:10:54,025 INFO L125 PetriNetUnfolderBase]: For 40880/40880 co-relation queries the response was YES. [2024-06-27 20:10:54,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60463 conditions, 19315 events. 14011/19315 cut-off events. For 40880/40880 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 106441 event pairs, 8422 based on Foata normal form. 3/19064 useless extension candidates. Maximal degree in co-relation 60444. Up to 18861 conditions per place. [2024-06-27 20:10:54,101 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 69 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2024-06-27 20:10:54,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 89 transitions, 539 flow [2024-06-27 20:10:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:54,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 20:10:54,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-27 20:10:54,103 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 279 flow. Second operand 6 states and 141 transitions. [2024-06-27 20:10:54,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 89 transitions, 539 flow [2024-06-27 20:10:54,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 506 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:54,111 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 325 flow [2024-06-27 20:10:54,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-27 20:10:54,112 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-27 20:10:54,112 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 325 flow [2024-06-27 20:10:54,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:54,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:54,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:54,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:10:54,113 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)] === [2024-06-27 20:10:54,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash 2010082996, now seen corresponding path program 1 times [2024-06-27 20:10:54,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:54,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136579583] [2024-06-27 20:10:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:54,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:54,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:55,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:55,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136579583] [2024-06-27 20:10:55,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136579583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:55,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:55,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:10:55,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381573143] [2024-06-27 20:10:55,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:55,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:10:55,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:10:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:10:55,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:10:55,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:55,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:55,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:10:55,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:58,691 INFO L124 PetriNetUnfolderBase]: 16085/21685 cut-off events. [2024-06-27 20:10:58,691 INFO L125 PetriNetUnfolderBase]: For 66213/66213 co-relation queries the response was YES. [2024-06-27 20:10:58,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73248 conditions, 21685 events. 16085/21685 cut-off events. For 66213/66213 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 115035 event pairs, 9605 based on Foata normal form. 3/21686 useless extension candidates. Maximal degree in co-relation 73228. Up to 21585 conditions per place. [2024-06-27 20:10:58,837 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 77 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-27 20:10:58,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 613 flow [2024-06-27 20:10:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:10:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:10:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-27 20:10:58,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371069182389937 [2024-06-27 20:10:58,840 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 325 flow. Second operand 6 states and 139 transitions. [2024-06-27 20:10:58,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 613 flow [2024-06-27 20:10:58,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 96 transitions, 566 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:58,854 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 361 flow [2024-06-27 20:10:58,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-27 20:10:58,855 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-27 20:10:58,855 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 361 flow [2024-06-27 20:10:58,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:58,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:58,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:58,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:10:58,856 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)] === [2024-06-27 20:10:58,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash 715016542, now seen corresponding path program 2 times [2024-06-27 20:10:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:58,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872795200] [2024-06-27 20:10:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:00,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:00,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872795200] [2024-06-27 20:11:00,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872795200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:00,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:00,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:11:00,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047771214] [2024-06-27 20:11:00,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:00,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:11:00,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:11:00,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:11:01,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:01,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:01,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:01,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:01,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:03,743 INFO L124 PetriNetUnfolderBase]: 16076/21676 cut-off events. [2024-06-27 20:11:03,743 INFO L125 PetriNetUnfolderBase]: For 86141/86157 co-relation queries the response was YES. [2024-06-27 20:11:03,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78191 conditions, 21676 events. 16076/21676 cut-off events. For 86141/86157 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 114775 event pairs, 9609 based on Foata normal form. 15/21687 useless extension candidates. Maximal degree in co-relation 78170. Up to 21543 conditions per place. [2024-06-27 20:11:03,849 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 71 selfloop transitions, 21 changer transitions 0/97 dead transitions. [2024-06-27 20:11:03,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 651 flow [2024-06-27 20:11:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:11:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:11:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 20:11:03,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-27 20:11:03,850 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 361 flow. Second operand 6 states and 138 transitions. [2024-06-27 20:11:03,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 651 flow [2024-06-27 20:11:03,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 600 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:03,861 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 415 flow [2024-06-27 20:11:03,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=415, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2024-06-27 20:11:03,862 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-27 20:11:03,862 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 415 flow [2024-06-27 20:11:03,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:03,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:03,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:03,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:11:03,863 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)] === [2024-06-27 20:11:03,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:03,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1539017310, now seen corresponding path program 1 times [2024-06-27 20:11:03,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:03,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551879405] [2024-06-27 20:11:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:03,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:05,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:05,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551879405] [2024-06-27 20:11:05,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551879405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:05,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:05,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:05,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494392847] [2024-06-27 20:11:05,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:05,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:05,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:05,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:05,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:05,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 415 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:05,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:05,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:05,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:08,667 INFO L124 PetriNetUnfolderBase]: 16212/21870 cut-off events. [2024-06-27 20:11:08,667 INFO L125 PetriNetUnfolderBase]: For 110929/110937 co-relation queries the response was YES. [2024-06-27 20:11:08,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83909 conditions, 21870 events. 16212/21870 cut-off events. For 110929/110937 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 115741 event pairs, 8686 based on Foata normal form. 14/21882 useless extension candidates. Maximal degree in co-relation 83887. Up to 21645 conditions per place. [2024-06-27 20:11:08,767 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 98 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-27 20:11:08,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 903 flow [2024-06-27 20:11:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 20:11:08,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-27 20:11:08,769 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 415 flow. Second operand 8 states and 188 transitions. [2024-06-27 20:11:08,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 903 flow [2024-06-27 20:11:08,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 822 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:08,784 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 569 flow [2024-06-27 20:11:08,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=569, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2024-06-27 20:11:08,785 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-27 20:11:08,785 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 569 flow [2024-06-27 20:11:08,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:08,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:08,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:08,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:11:08,786 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)] === [2024-06-27 20:11:08,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2112054590, now seen corresponding path program 2 times [2024-06-27 20:11:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:08,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176229716] [2024-06-27 20:11:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:08,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:10,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176229716] [2024-06-27 20:11:10,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176229716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:10,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:10,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013458956] [2024-06-27 20:11:10,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:10,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:10,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:10,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:10,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:10,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 569 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:10,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:10,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:10,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:13,610 INFO L124 PetriNetUnfolderBase]: 16256/21930 cut-off events. [2024-06-27 20:11:13,610 INFO L125 PetriNetUnfolderBase]: For 139438/139450 co-relation queries the response was YES. [2024-06-27 20:11:13,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90683 conditions, 21930 events. 16256/21930 cut-off events. For 139438/139450 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 116102 event pairs, 8519 based on Foata normal form. 18/21946 useless extension candidates. Maximal degree in co-relation 90657. Up to 21667 conditions per place. [2024-06-27 20:11:13,751 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 96 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-27 20:11:13,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 142 transitions, 1077 flow [2024-06-27 20:11:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 20:11:13,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444743935309973 [2024-06-27 20:11:13,753 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 569 flow. Second operand 7 states and 165 transitions. [2024-06-27 20:11:13,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 142 transitions, 1077 flow [2024-06-27 20:11:13,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 142 transitions, 1000 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:13,784 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 716 flow [2024-06-27 20:11:13,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=716, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-06-27 20:11:13,785 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2024-06-27 20:11:13,785 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 716 flow [2024-06-27 20:11:13,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:13,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:13,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:13,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:11:13,786 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)] === [2024-06-27 20:11:13,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1377178444, now seen corresponding path program 3 times [2024-06-27 20:11:13,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:13,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660673039] [2024-06-27 20:11:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:15,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:15,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660673039] [2024-06-27 20:11:15,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660673039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:15,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:15,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:15,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246237129] [2024-06-27 20:11:15,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:15,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:15,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:15,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:15,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:15,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:15,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 716 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:15,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:15,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:15,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:18,660 INFO L124 PetriNetUnfolderBase]: 16331/22041 cut-off events. [2024-06-27 20:11:18,660 INFO L125 PetriNetUnfolderBase]: For 175632/175632 co-relation queries the response was YES. [2024-06-27 20:11:18,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97421 conditions, 22041 events. 16331/22041 cut-off events. For 175632/175632 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 116682 event pairs, 8416 based on Foata normal form. 6/22045 useless extension candidates. Maximal degree in co-relation 97393. Up to 21690 conditions per place. [2024-06-27 20:11:18,820 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 95 selfloop transitions, 49 changer transitions 0/149 dead transitions. [2024-06-27 20:11:18,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 149 transitions, 1314 flow [2024-06-27 20:11:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 20:11:18,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-27 20:11:18,822 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 716 flow. Second operand 7 states and 168 transitions. [2024-06-27 20:11:18,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 149 transitions, 1314 flow [2024-06-27 20:11:18,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 149 transitions, 1193 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:18,867 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 850 flow [2024-06-27 20:11:18,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2024-06-27 20:11:18,868 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-27 20:11:18,868 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 850 flow [2024-06-27 20:11:18,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:18,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:18,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:18,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:11:18,869 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)] === [2024-06-27 20:11:18,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1377178630, now seen corresponding path program 1 times [2024-06-27 20:11:18,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:18,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518661866] [2024-06-27 20:11:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:20,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:20,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518661866] [2024-06-27 20:11:20,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518661866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:20,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:20,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:20,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593757013] [2024-06-27 20:11:20,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:20,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:20,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:20,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:21,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:21,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:21,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:21,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:21,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:24,014 INFO L124 PetriNetUnfolderBase]: 16353/22071 cut-off events. [2024-06-27 20:11:24,014 INFO L125 PetriNetUnfolderBase]: For 176612/176624 co-relation queries the response was YES. [2024-06-27 20:11:24,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96581 conditions, 22071 events. 16353/22071 cut-off events. For 176612/176624 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 116985 event pairs, 8308 based on Foata normal form. 15/22084 useless extension candidates. Maximal degree in co-relation 96552. Up to 21922 conditions per place. [2024-06-27 20:11:24,183 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 124 selfloop transitions, 22 changer transitions 0/151 dead transitions. [2024-06-27 20:11:24,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 151 transitions, 1320 flow [2024-06-27 20:11:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 20:11:24,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431266846361186 [2024-06-27 20:11:24,186 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 850 flow. Second operand 7 states and 160 transitions. [2024-06-27 20:11:24,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 151 transitions, 1320 flow [2024-06-27 20:11:24,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 151 transitions, 1241 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:24,273 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 890 flow [2024-06-27 20:11:24,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=890, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-27 20:11:24,274 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-27 20:11:24,275 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 890 flow [2024-06-27 20:11:24,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:24,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:24,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:24,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:11:24,275 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)] === [2024-06-27 20:11:24,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1554316660, now seen corresponding path program 2 times [2024-06-27 20:11:24,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:24,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357450326] [2024-06-27 20:11:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:24,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:26,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357450326] [2024-06-27 20:11:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357450326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:26,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679170040] [2024-06-27 20:11:26,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:26,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:26,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:26,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 890 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:26,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:26,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:26,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:29,358 INFO L124 PetriNetUnfolderBase]: 16403/22151 cut-off events. [2024-06-27 20:11:29,358 INFO L125 PetriNetUnfolderBase]: For 208329/208363 co-relation queries the response was YES. [2024-06-27 20:11:29,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101964 conditions, 22151 events. 16403/22151 cut-off events. For 208329/208363 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 117474 event pairs, 7928 based on Foata normal form. 32/22177 useless extension candidates. Maximal degree in co-relation 101933. Up to 21840 conditions per place. [2024-06-27 20:11:29,519 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 119 selfloop transitions, 39 changer transitions 0/163 dead transitions. [2024-06-27 20:11:29,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 163 transitions, 1534 flow [2024-06-27 20:11:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 20:11:29,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444743935309973 [2024-06-27 20:11:29,521 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 890 flow. Second operand 7 states and 165 transitions. [2024-06-27 20:11:29,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 163 transitions, 1534 flow [2024-06-27 20:11:29,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 163 transitions, 1447 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:29,610 INFO L231 Difference]: Finished difference. Result has 94 places, 124 transitions, 1045 flow [2024-06-27 20:11:29,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1045, PETRI_PLACES=94, PETRI_TRANSITIONS=124} [2024-06-27 20:11:29,611 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-27 20:11:29,611 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 124 transitions, 1045 flow [2024-06-27 20:11:29,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:29,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:29,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:29,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:11:29,612 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)] === [2024-06-27 20:11:29,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:29,613 INFO L85 PathProgramCache]: Analyzing trace with hash 690678266, now seen corresponding path program 4 times [2024-06-27 20:11:29,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:29,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706736635] [2024-06-27 20:11:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:29,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:31,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706736635] [2024-06-27 20:11:31,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706736635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:31,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:31,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:31,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033889257] [2024-06-27 20:11:31,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:31,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:31,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:31,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:31,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 124 transitions, 1045 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:31,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:31,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:31,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:34,579 INFO L124 PetriNetUnfolderBase]: 16385/22128 cut-off events. [2024-06-27 20:11:34,579 INFO L125 PetriNetUnfolderBase]: For 248729/248745 co-relation queries the response was YES. [2024-06-27 20:11:34,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107797 conditions, 22128 events. 16385/22128 cut-off events. For 248729/248745 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 117240 event pairs, 8119 based on Foata normal form. 14/22129 useless extension candidates. Maximal degree in co-relation 107764. Up to 21705 conditions per place. [2024-06-27 20:11:34,741 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 100 selfloop transitions, 59 changer transitions 0/164 dead transitions. [2024-06-27 20:11:34,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 164 transitions, 1619 flow [2024-06-27 20:11:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 20:11:34,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-27 20:11:34,742 INFO L175 Difference]: Start difference. First operand has 94 places, 124 transitions, 1045 flow. Second operand 7 states and 167 transitions. [2024-06-27 20:11:34,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 164 transitions, 1619 flow [2024-06-27 20:11:34,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 164 transitions, 1545 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:34,837 INFO L231 Difference]: Finished difference. Result has 98 places, 128 transitions, 1180 flow [2024-06-27 20:11:34,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=971, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1180, PETRI_PLACES=98, PETRI_TRANSITIONS=128} [2024-06-27 20:11:34,838 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-27 20:11:34,838 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 128 transitions, 1180 flow [2024-06-27 20:11:34,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:34,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:34,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:11:34,839 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)] === [2024-06-27 20:11:34,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2107292804, now seen corresponding path program 3 times [2024-06-27 20:11:34,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:34,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694261221] [2024-06-27 20:11:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:36,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:36,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694261221] [2024-06-27 20:11:36,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694261221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:36,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:36,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:36,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263536603] [2024-06-27 20:11:36,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:36,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:37,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:37,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 128 transitions, 1180 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:37,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:37,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:37,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:41,098 INFO L124 PetriNetUnfolderBase]: 16398/22140 cut-off events. [2024-06-27 20:11:41,098 INFO L125 PetriNetUnfolderBase]: For 288444/288478 co-relation queries the response was YES. [2024-06-27 20:11:41,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112967 conditions, 22140 events. 16398/22140 cut-off events. For 288444/288478 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 117362 event pairs, 8105 based on Foata normal form. 32/22166 useless extension candidates. Maximal degree in co-relation 112932. Up to 21940 conditions per place. [2024-06-27 20:11:41,226 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 133 selfloop transitions, 29 changer transitions 0/167 dead transitions. [2024-06-27 20:11:41,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 167 transitions, 1694 flow [2024-06-27 20:11:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 20:11:41,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.431266846361186 [2024-06-27 20:11:41,227 INFO L175 Difference]: Start difference. First operand has 98 places, 128 transitions, 1180 flow. Second operand 7 states and 160 transitions. [2024-06-27 20:11:41,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 167 transitions, 1694 flow [2024-06-27 20:11:41,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 167 transitions, 1517 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:41,342 INFO L231 Difference]: Finished difference. Result has 100 places, 132 transitions, 1148 flow [2024-06-27 20:11:41,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1148, PETRI_PLACES=100, PETRI_TRANSITIONS=132} [2024-06-27 20:11:41,343 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-27 20:11:41,343 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 132 transitions, 1148 flow [2024-06-27 20:11:41,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 20:11:41,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:41,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:41,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:11:41,344 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:11:41,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:41,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1554556228, now seen corresponding path program 1 times [2024-06-27 20:11:41,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:41,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626544997] [2024-06-27 20:11:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:41,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:43,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:43,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626544997] [2024-06-27 20:11:43,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626544997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:43,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:43,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:11:43,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424243165] [2024-06-27 20:11:43,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:43,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:11:43,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:11:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:11:43,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:43,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 132 transitions, 1148 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:43,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:43,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:43,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:47,482 INFO L124 PetriNetUnfolderBase]: 16837/23119 cut-off events. [2024-06-27 20:11:47,483 INFO L125 PetriNetUnfolderBase]: For 304387/304387 co-relation queries the response was YES. [2024-06-27 20:11:47,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117062 conditions, 23119 events. 16837/23119 cut-off events. For 304387/304387 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 126666 event pairs, 8205 based on Foata normal form. 3/22831 useless extension candidates. Maximal degree in co-relation 117026. Up to 22603 conditions per place. [2024-06-27 20:11:47,612 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 144 selfloop transitions, 21 changer transitions 0/170 dead transitions. [2024-06-27 20:11:47,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 1661 flow [2024-06-27 20:11:47,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:11:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:11:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 20:11:47,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42587601078167114 [2024-06-27 20:11:47,613 INFO L175 Difference]: Start difference. First operand has 100 places, 132 transitions, 1148 flow. Second operand 7 states and 158 transitions. [2024-06-27 20:11:47,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 1661 flow [2024-06-27 20:11:47,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 170 transitions, 1570 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:47,735 INFO L231 Difference]: Finished difference. Result has 103 places, 139 transitions, 1211 flow [2024-06-27 20:11:47,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1211, PETRI_PLACES=103, PETRI_TRANSITIONS=139} [2024-06-27 20:11:47,735 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-27 20:11:47,735 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 139 transitions, 1211 flow [2024-06-27 20:11:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:47,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:47,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:11:47,736 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:11:47,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 254600117, now seen corresponding path program 1 times [2024-06-27 20:11:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:47,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538919417] [2024-06-27 20:11:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:49,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:49,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538919417] [2024-06-27 20:11:49,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538919417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:49,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:49,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:11:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686715189] [2024-06-27 20:11:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:49,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:11:49,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:49,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:11:49,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:11:49,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:49,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 139 transitions, 1211 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:49,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:49,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:49,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:52,761 INFO L124 PetriNetUnfolderBase]: 16830/23194 cut-off events. [2024-06-27 20:11:52,761 INFO L125 PetriNetUnfolderBase]: For 313703/313703 co-relation queries the response was YES. [2024-06-27 20:11:52,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119426 conditions, 23194 events. 16830/23194 cut-off events. For 313703/313703 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 127056 event pairs, 8187 based on Foata normal form. 2/22948 useless extension candidates. Maximal degree in co-relation 119388. Up to 22645 conditions per place. [2024-06-27 20:11:52,905 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 142 selfloop transitions, 10 changer transitions 0/157 dead transitions. [2024-06-27 20:11:52,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 157 transitions, 1609 flow [2024-06-27 20:11:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:11:52,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:11:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-27 20:11:52,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188679245283019 [2024-06-27 20:11:52,907 INFO L175 Difference]: Start difference. First operand has 103 places, 139 transitions, 1211 flow. Second operand 5 states and 111 transitions. [2024-06-27 20:11:52,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 157 transitions, 1609 flow [2024-06-27 20:11:53,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 157 transitions, 1534 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:53,040 INFO L231 Difference]: Finished difference. Result has 104 places, 143 transitions, 1223 flow [2024-06-27 20:11:53,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1223, PETRI_PLACES=104, PETRI_TRANSITIONS=143} [2024-06-27 20:11:53,041 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-27 20:11:53,041 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 143 transitions, 1223 flow [2024-06-27 20:11:53,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:53,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:53,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:53,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:11:53,042 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)] === [2024-06-27 20:11:53,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1049271085, now seen corresponding path program 1 times [2024-06-27 20:11:53,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:53,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167395669] [2024-06-27 20:11:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:53,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:55,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:55,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167395669] [2024-06-27 20:11:55,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167395669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:55,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:55,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115600881] [2024-06-27 20:11:55,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:55,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:55,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:55,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-27 20:11:55,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 143 transitions, 1223 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:55,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:55,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-27 20:11:55,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand