./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix036_power.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix036_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix036_power.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix036_power.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:24:14,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:24:14,609 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:24:14,613 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:24:14,614 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:24:14,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:24:14,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:24:14,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:24:14,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:24:14,663 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:24:14,663 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:24:14,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:24:14,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:24:14,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:24:14,665 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:24:14,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:24:14,676 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:24:14,676 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:24:14,677 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:24:14,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:24:14,678 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:24:14,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:24:14,679 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:24:14,679 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:24:14,679 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:24:14,680 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:24:14,680 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:24:14,680 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:24:14,681 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:24:14,681 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:24:14,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:24:14,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:24:14,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:24:14,683 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:24:14,683 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:24:14,683 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:24:14,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:24:14,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:24:14,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:24:14,684 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:24:14,684 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:24:14,684 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:24:14,685 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:24:14,685 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:24:14,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:24:14,924 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:24:14,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:24:14,929 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:24:14,930 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:24:14,931 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix036_power.opt_rmo.opt.yml/witness.yml [2024-06-14 12:24:15,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:24:15,129 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:24:15,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix036_power.opt_rmo.opt.i [2024-06-14 12:24:16,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:24:16,591 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:24:16,593 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix036_power.opt_rmo.opt.i [2024-06-14 12:24:16,612 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65736f106/ae0c361f61794a8dac90ba2b6840bd54/FLAG4f2fbf777 [2024-06-14 12:24:16,625 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65736f106/ae0c361f61794a8dac90ba2b6840bd54 [2024-06-14 12:24:16,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:24:16,627 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:24:16,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:24:16,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:24:16,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:24:16,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:24:15" (1/2) ... [2024-06-14 12:24:16,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe6c152 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:24:16, skipping insertion in model container [2024-06-14 12:24:16,634 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:24:15" (1/2) ... [2024-06-14 12:24:16,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e0269cf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:24:16, skipping insertion in model container [2024-06-14 12:24:16,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:24:16" (2/2) ... [2024-06-14 12:24:16,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe6c152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:16, skipping insertion in model container [2024-06-14 12:24:16,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:24:16" (2/2) ... [2024-06-14 12:24:16,636 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:24:16,782 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:24:16,783 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((((! multithreaded || y$r_buff0_thd4 == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0) [2024-06-14 12:24:16,783 INFO L97 edCorrectnessWitness]: Location invariant before [L868-L868] ((((((((((((((((((((((((! multithreaded || y$r_buff0_thd4 == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0) [2024-06-14 12:24:16,784 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((((! multithreaded || y$r_buff0_thd4 == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0) [2024-06-14 12:24:16,784 INFO L97 edCorrectnessWitness]: Location invariant before [L870-L870] ((((((((((((((((((((((((! multithreaded || y$r_buff0_thd4 == (_Bool)0) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0) [2024-06-14 12:24:16,784 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:24:16,784 INFO L106 edCorrectnessWitness]: ghost_update [L864-L864] multithreaded = 1; [2024-06-14 12:24:16,826 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:24:17,259 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:24:17,268 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:24:17,421 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:24:17,458 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:24:17,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17 WrapperNode [2024-06-14 12:24:17,459 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:24:17,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:24:17,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:24:17,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:24:17,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,522 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 141 [2024-06-14 12:24:17,523 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:24:17,523 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:24:17,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:24:17,524 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:24:17,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,539 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,557 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]. [2024-06-14 12:24:17,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,568 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,575 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:24:17,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:24:17,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:24:17,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:24:17,590 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (1/1) ... [2024-06-14 12:24:17,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:24:17,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:24:17,625 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) [2024-06-14 12:24:17,656 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 [2024-06-14 12:24:17,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:24:17,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:24:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:24:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:24:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:24:17,676 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:24:17,676 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:24:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:24:17,677 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:24:17,677 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:24:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:24:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:24:17,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:24:17,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:24:17,680 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:24:17,826 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:24:17,828 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:24:18,256 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:24:18,257 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:24:18,469 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:24:18,469 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:24:18,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:24:18 BoogieIcfgContainer [2024-06-14 12:24:18,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:24:18,477 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:24:18,477 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:24:18,480 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:24:18,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:24:15" (1/4) ... [2024-06-14 12:24:18,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8dd6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:24:18, skipping insertion in model container [2024-06-14 12:24:18,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:24:16" (2/4) ... [2024-06-14 12:24:18,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8dd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:24:18, skipping insertion in model container [2024-06-14 12:24:18,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:24:17" (3/4) ... [2024-06-14 12:24:18,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8dd6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:24:18, skipping insertion in model container [2024-06-14 12:24:18,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:24:18" (4/4) ... [2024-06-14 12:24:18,484 INFO L112 eAbstractionObserver]: Analyzing ICFG mix036_power.opt_rmo.opt.i [2024-06-14 12:24:18,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:24:18,501 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:24:18,501 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:24:18,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:24:18,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:24:18,636 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 12:24:18,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:24:18,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:24:18,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:24:18,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 12:24:18,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:24:18,663 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;@64626150, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:24:18,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:24:18,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:24:18,669 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:24:18,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:24:18,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:18,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:24:18,671 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)] === [2024-06-14 12:24:18,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -715442049, now seen corresponding path program 1 times [2024-06-14 12:24:18,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:18,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324221593] [2024-06-14 12:24:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:18,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:20,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:20,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324221593] [2024-06-14 12:24:20,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324221593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:20,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:20,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:24:20,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224547357] [2024-06-14 12:24:20,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:20,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:24:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:24:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:24:20,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-14 12:24:20,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:20,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:20,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-14 12:24:20,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:21,859 INFO L124 PetriNetUnfolderBase]: 6197/8942 cut-off events. [2024-06-14 12:24:21,859 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-06-14 12:24:21,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17690 conditions, 8942 events. 6197/8942 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 51539 event pairs, 4558 based on Foata normal form. 1/8663 useless extension candidates. Maximal degree in co-relation 17674. Up to 8479 conditions per place. [2024-06-14 12:24:21,923 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 12:24:21,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 233 flow [2024-06-14 12:24:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:24:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:24:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-14 12:24:21,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-14 12:24:21,937 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 103 transitions. [2024-06-14 12:24:21,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 233 flow [2024-06-14 12:24:21,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:21,946 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 12:24:21,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 12:24:21,951 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 12:24:21,951 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 12:24:21,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:21,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:21,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:21,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:24:21,953 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)] === [2024-06-14 12:24:21,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash -344984546, now seen corresponding path program 1 times [2024-06-14 12:24:21,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:21,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994187823] [2024-06-14 12:24:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:21,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994187823] [2024-06-14 12:24:23,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994187823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:23,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:23,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:24:23,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248390318] [2024-06-14 12:24:23,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:23,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:24:23,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:24:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:24:23,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 12:24:23,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:23,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:23,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 12:24:23,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:24,687 INFO L124 PetriNetUnfolderBase]: 7092/9983 cut-off events. [2024-06-14 12:24:24,687 INFO L125 PetriNetUnfolderBase]: For 2006/2006 co-relation queries the response was YES. [2024-06-14 12:24:24,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22712 conditions, 9983 events. 7092/9983 cut-off events. For 2006/2006 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 56404 event pairs, 4490 based on Foata normal form. 4/9861 useless extension candidates. Maximal degree in co-relation 22697. Up to 9649 conditions per place. [2024-06-14 12:24:24,749 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 12:24:24,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 327 flow [2024-06-14 12:24:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:24:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:24:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-14 12:24:24,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-14 12:24:24,752 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-14 12:24:24,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 327 flow [2024-06-14 12:24:24,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:24:24,755 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 12:24:24,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 12:24:24,756 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 12:24:24,756 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 12:24:24,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:24,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:24,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:24,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:24:24,758 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)] === [2024-06-14 12:24:24,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash 423965529, now seen corresponding path program 1 times [2024-06-14 12:24:24,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:24,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654781590] [2024-06-14 12:24:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:26,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:26,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654781590] [2024-06-14 12:24:26,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654781590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:26,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:26,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:24:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598251156] [2024-06-14 12:24:26,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:26,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:24:26,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:24:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:24:26,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:24:26,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:26,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:26,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:24:26,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:28,039 INFO L124 PetriNetUnfolderBase]: 9006/12595 cut-off events. [2024-06-14 12:24:28,039 INFO L125 PetriNetUnfolderBase]: For 6820/6820 co-relation queries the response was YES. [2024-06-14 12:24:28,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31740 conditions, 12595 events. 9006/12595 cut-off events. For 6820/6820 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 69676 event pairs, 4478 based on Foata normal form. 8/12444 useless extension candidates. Maximal degree in co-relation 31723. Up to 12137 conditions per place. [2024-06-14 12:24:28,145 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 72 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-14 12:24:28,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 492 flow [2024-06-14 12:24:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:24:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:24:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-14 12:24:28,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-06-14 12:24:28,153 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 182 transitions. [2024-06-14 12:24:28,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 492 flow [2024-06-14 12:24:28,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 464 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 12:24:28,159 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 245 flow [2024-06-14 12:24:28,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, 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=6, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-14 12:24:28,161 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2024-06-14 12:24:28,161 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 245 flow [2024-06-14 12:24:28,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:28,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:28,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:28,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:24:28,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:24:28,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -840260612, now seen corresponding path program 1 times [2024-06-14 12:24:28,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:28,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021446169] [2024-06-14 12:24:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:29,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:29,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021446169] [2024-06-14 12:24:29,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021446169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:29,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:29,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:24:29,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006290756] [2024-06-14 12:24:29,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:29,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:24:29,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:29,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:24:29,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:24:29,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:24:29,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:29,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:29,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:24:29,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:30,809 INFO L124 PetriNetUnfolderBase]: 7838/11287 cut-off events. [2024-06-14 12:24:30,810 INFO L125 PetriNetUnfolderBase]: For 11339/11339 co-relation queries the response was YES. [2024-06-14 12:24:30,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31055 conditions, 11287 events. 7838/11287 cut-off events. For 11339/11339 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 64457 event pairs, 4142 based on Foata normal form. 6/11114 useless extension candidates. Maximal degree in co-relation 31036. Up to 10642 conditions per place. [2024-06-14 12:24:30,892 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 61 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-14 12:24:30,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 455 flow [2024-06-14 12:24:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:24:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:24:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-14 12:24:30,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-14 12:24:30,894 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 245 flow. Second operand 5 states and 138 transitions. [2024-06-14 12:24:30,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 455 flow [2024-06-14 12:24:30,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 417 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:30,899 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 268 flow [2024-06-14 12:24:30,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-14 12:24:30,900 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-14 12:24:30,901 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 268 flow [2024-06-14 12:24:30,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:30,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:30,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:30,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:24:30,901 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)] === [2024-06-14 12:24:30,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:30,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1396195577, now seen corresponding path program 1 times [2024-06-14 12:24:30,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:30,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986474481] [2024-06-14 12:24:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:30,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:32,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:32,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986474481] [2024-06-14 12:24:32,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986474481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:32,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:32,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:24:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115766177] [2024-06-14 12:24:32,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:32,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:24:32,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:32,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:24:32,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:24:32,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:24:32,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:32,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:32,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:24:32,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:33,725 INFO L124 PetriNetUnfolderBase]: 9032/12669 cut-off events. [2024-06-14 12:24:33,725 INFO L125 PetriNetUnfolderBase]: For 20420/20420 co-relation queries the response was YES. [2024-06-14 12:24:33,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38298 conditions, 12669 events. 9032/12669 cut-off events. For 20420/20420 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 70176 event pairs, 4552 based on Foata normal form. 6/12516 useless extension candidates. Maximal degree in co-relation 38277. Up to 12129 conditions per place. [2024-06-14 12:24:33,806 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 74 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-06-14 12:24:33,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 103 transitions, 620 flow [2024-06-14 12:24:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:24:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:24:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-14 12:24:33,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2024-06-14 12:24:33,808 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 268 flow. Second operand 6 states and 169 transitions. [2024-06-14 12:24:33,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 103 transitions, 620 flow [2024-06-14 12:24:33,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 103 transitions, 591 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:33,815 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 356 flow [2024-06-14 12:24:33,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=356, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-14 12:24:33,820 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-06-14 12:24:33,821 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 356 flow [2024-06-14 12:24:33,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:33,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:33,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:33,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:24:33,822 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)] === [2024-06-14 12:24:33,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:33,822 INFO L85 PathProgramCache]: Analyzing trace with hash 9023649, now seen corresponding path program 2 times [2024-06-14 12:24:33,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:33,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725774287] [2024-06-14 12:24:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:33,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:34,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725774287] [2024-06-14 12:24:34,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725774287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:34,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:34,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:24:34,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906557711] [2024-06-14 12:24:34,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:34,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:24:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:34,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:24:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:24:35,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:24:35,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:35,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:35,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:24:35,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:36,557 INFO L124 PetriNetUnfolderBase]: 9014/12649 cut-off events. [2024-06-14 12:24:36,557 INFO L125 PetriNetUnfolderBase]: For 30098/30107 co-relation queries the response was YES. [2024-06-14 12:24:36,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41423 conditions, 12649 events. 9014/12649 cut-off events. For 30098/30107 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 70100 event pairs, 4548 based on Foata normal form. 12/12504 useless extension candidates. Maximal degree in co-relation 41401. Up to 12114 conditions per place. [2024-06-14 12:24:36,627 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 67 selfloop transitions, 21 changer transitions 0/96 dead transitions. [2024-06-14 12:24:36,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 598 flow [2024-06-14 12:24:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:24:36,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:24:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 12:24:36,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:24:36,643 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 356 flow. Second operand 6 states and 162 transitions. [2024-06-14 12:24:36,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 598 flow [2024-06-14 12:24:36,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 552 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:24:36,669 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 363 flow [2024-06-14 12:24:36,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-06-14 12:24:36,673 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-14 12:24:36,673 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 363 flow [2024-06-14 12:24:36,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:36,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:36,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:24:36,674 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)] === [2024-06-14 12:24:36,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2109530149, now seen corresponding path program 1 times [2024-06-14 12:24:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:36,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841386830] [2024-06-14 12:24:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:36,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:37,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:37,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841386830] [2024-06-14 12:24:37,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841386830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:37,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:37,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:37,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918260047] [2024-06-14 12:24:37,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:37,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:37,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:37,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:37,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:38,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:24:38,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:38,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:38,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:24:38,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:39,521 INFO L124 PetriNetUnfolderBase]: 9127/12825 cut-off events. [2024-06-14 12:24:39,521 INFO L125 PetriNetUnfolderBase]: For 34835/34839 co-relation queries the response was YES. [2024-06-14 12:24:39,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42496 conditions, 12825 events. 9127/12825 cut-off events. For 34835/34839 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 71105 event pairs, 4782 based on Foata normal form. 10/12681 useless extension candidates. Maximal degree in co-relation 42472. Up to 12284 conditions per place. [2024-06-14 12:24:39,610 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 90 selfloop transitions, 32 changer transitions 0/130 dead transitions. [2024-06-14 12:24:39,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 130 transitions, 830 flow [2024-06-14 12:24:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:24:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:24:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-14 12:24:39,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:24:39,613 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 363 flow. Second operand 8 states and 216 transitions. [2024-06-14 12:24:39,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 130 transitions, 830 flow [2024-06-14 12:24:39,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 130 transitions, 756 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:39,634 INFO L231 Difference]: Finished difference. Result has 76 places, 89 transitions, 515 flow [2024-06-14 12:24:39,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=515, PETRI_PLACES=76, PETRI_TRANSITIONS=89} [2024-06-14 12:24:39,636 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 19 predicate places. [2024-06-14 12:24:39,636 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 89 transitions, 515 flow [2024-06-14 12:24:39,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:39,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:39,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:39,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:24:39,637 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)] === [2024-06-14 12:24:39,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:39,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1304557733, now seen corresponding path program 2 times [2024-06-14 12:24:39,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:39,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823770621] [2024-06-14 12:24:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:39,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:41,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823770621] [2024-06-14 12:24:41,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823770621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:41,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:41,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686836966] [2024-06-14 12:24:41,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:41,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:41,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:24:41,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 89 transitions, 515 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:41,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:41,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:24:41,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:42,861 INFO L124 PetriNetUnfolderBase]: 9171/12890 cut-off events. [2024-06-14 12:24:42,861 INFO L125 PetriNetUnfolderBase]: For 47368/47376 co-relation queries the response was YES. [2024-06-14 12:24:42,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46160 conditions, 12890 events. 9171/12890 cut-off events. For 47368/47376 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 71530 event pairs, 4670 based on Foata normal form. 14/12745 useless extension candidates. Maximal degree in co-relation 46134. Up to 12306 conditions per place. [2024-06-14 12:24:42,960 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 90 selfloop transitions, 34 changer transitions 0/132 dead transitions. [2024-06-14 12:24:42,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 132 transitions, 935 flow [2024-06-14 12:24:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:24:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:24:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:24:42,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-14 12:24:42,964 INFO L175 Difference]: Start difference. First operand has 76 places, 89 transitions, 515 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:24:42,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 132 transitions, 935 flow [2024-06-14 12:24:42,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 132 transitions, 877 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:43,005 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 592 flow [2024-06-14 12:24:43,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=592, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-14 12:24:43,008 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2024-06-14 12:24:43,009 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 592 flow [2024-06-14 12:24:43,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:43,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:43,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:43,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:24:43,010 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)] === [2024-06-14 12:24:43,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1304437763, now seen corresponding path program 3 times [2024-06-14 12:24:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:43,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179022232] [2024-06-14 12:24:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:44,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:44,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179022232] [2024-06-14 12:24:44,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179022232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:44,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:44,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:44,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58708761] [2024-06-14 12:24:44,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:44,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:44,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:44,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:24:44,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 592 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:44,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:44,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:24:44,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:46,449 INFO L124 PetriNetUnfolderBase]: 9215/12971 cut-off events. [2024-06-14 12:24:46,449 INFO L125 PetriNetUnfolderBase]: For 62037/62039 co-relation queries the response was YES. [2024-06-14 12:24:46,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49708 conditions, 12971 events. 9215/12971 cut-off events. For 62037/62039 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 71907 event pairs, 4262 based on Foata normal form. 6/12818 useless extension candidates. Maximal degree in co-relation 49681. Up to 12175 conditions per place. [2024-06-14 12:24:46,551 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 83 selfloop transitions, 50 changer transitions 0/141 dead transitions. [2024-06-14 12:24:46,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 141 transitions, 1124 flow [2024-06-14 12:24:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:24:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:24:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-14 12:24:46,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2024-06-14 12:24:46,553 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 592 flow. Second operand 7 states and 197 transitions. [2024-06-14 12:24:46,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 141 transitions, 1124 flow [2024-06-14 12:24:46,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 141 transitions, 1005 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:24:46,595 INFO L231 Difference]: Finished difference. Result has 82 places, 101 transitions, 698 flow [2024-06-14 12:24:46,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=698, PETRI_PLACES=82, PETRI_TRANSITIONS=101} [2024-06-14 12:24:46,596 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-14 12:24:46,596 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 101 transitions, 698 flow [2024-06-14 12:24:46,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:46,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:46,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:46,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:24:46,597 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)] === [2024-06-14 12:24:46,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash 279734427, now seen corresponding path program 4 times [2024-06-14 12:24:46,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:46,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735659316] [2024-06-14 12:24:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:46,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:47,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:47,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735659316] [2024-06-14 12:24:47,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735659316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:47,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:47,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:47,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749648060] [2024-06-14 12:24:47,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:47,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:47,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:47,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:47,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:24:47,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 101 transitions, 698 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:47,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:47,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:24:47,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:49,422 INFO L124 PetriNetUnfolderBase]: 9197/12949 cut-off events. [2024-06-14 12:24:49,422 INFO L125 PetriNetUnfolderBase]: For 63080/63085 co-relation queries the response was YES. [2024-06-14 12:24:49,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49573 conditions, 12949 events. 9197/12949 cut-off events. For 63080/63085 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 71851 event pairs, 4270 based on Foata normal form. 6/12787 useless extension candidates. Maximal degree in co-relation 49545. Up to 12160 conditions per place. [2024-06-14 12:24:49,638 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 77 selfloop transitions, 50 changer transitions 0/135 dead transitions. [2024-06-14 12:24:49,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 135 transitions, 1056 flow [2024-06-14 12:24:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:24:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:24:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:24:49,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-14 12:24:49,639 INFO L175 Difference]: Start difference. First operand has 82 places, 101 transitions, 698 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:24:49,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 135 transitions, 1056 flow [2024-06-14 12:24:49,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 135 transitions, 973 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:49,674 INFO L231 Difference]: Finished difference. Result has 86 places, 101 transitions, 726 flow [2024-06-14 12:24:49,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=86, PETRI_TRANSITIONS=101} [2024-06-14 12:24:49,675 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-06-14 12:24:49,675 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 101 transitions, 726 flow [2024-06-14 12:24:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:49,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:49,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:49,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:24:49,676 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)] === [2024-06-14 12:24:49,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1133006439, now seen corresponding path program 1 times [2024-06-14 12:24:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:49,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107367757] [2024-06-14 12:24:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:51,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:51,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107367757] [2024-06-14 12:24:51,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107367757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:51,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:51,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:24:51,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508632895] [2024-06-14 12:24:51,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:51,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:24:51,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:24:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:24:51,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:24:51,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 101 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:51,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:51,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:24:51,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:53,287 INFO L124 PetriNetUnfolderBase]: 8032/11524 cut-off events. [2024-06-14 12:24:53,287 INFO L125 PetriNetUnfolderBase]: For 61176/61178 co-relation queries the response was YES. [2024-06-14 12:24:53,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45002 conditions, 11524 events. 8032/11524 cut-off events. For 61176/61178 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 65609 event pairs, 3728 based on Foata normal form. 6/11399 useless extension candidates. Maximal degree in co-relation 44972. Up to 10879 conditions per place. [2024-06-14 12:24:53,348 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 114 selfloop transitions, 17 changer transitions 0/140 dead transitions. [2024-06-14 12:24:53,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 140 transitions, 1153 flow [2024-06-14 12:24:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:24:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:24:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 12:24:53,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:24:53,350 INFO L175 Difference]: Start difference. First operand has 86 places, 101 transitions, 726 flow. Second operand 7 states and 189 transitions. [2024-06-14 12:24:53,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 140 transitions, 1153 flow [2024-06-14 12:24:53,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 140 transitions, 1012 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:24:53,403 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 707 flow [2024-06-14 12:24:53,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=707, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2024-06-14 12:24:53,404 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-14 12:24:53,404 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 707 flow [2024-06-14 12:24:53,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:53,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:53,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:53,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:24:53,405 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:24:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2047717119, now seen corresponding path program 1 times [2024-06-14 12:24:53,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:53,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933753442] [2024-06-14 12:24:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:54,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:54,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933753442] [2024-06-14 12:24:54,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933753442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:54,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:54,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:24:54,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003521245] [2024-06-14 12:24:54,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:54,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:24:54,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:54,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:24:54,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:24:54,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 12:24:54,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 707 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:54,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:54,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 12:24:54,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:56,058 INFO L124 PetriNetUnfolderBase]: 7536/11395 cut-off events. [2024-06-14 12:24:56,059 INFO L125 PetriNetUnfolderBase]: For 72653/72673 co-relation queries the response was YES. [2024-06-14 12:24:56,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46125 conditions, 11395 events. 7536/11395 cut-off events. For 72653/72673 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 70417 event pairs, 3799 based on Foata normal form. 20/11386 useless extension candidates. Maximal degree in co-relation 46093. Up to 10273 conditions per place. [2024-06-14 12:24:56,142 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 102 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-06-14 12:24:56,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 126 transitions, 1011 flow [2024-06-14 12:24:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:24:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:24:56,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 12:24:56,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-14 12:24:56,144 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 707 flow. Second operand 5 states and 137 transitions. [2024-06-14 12:24:56,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 126 transitions, 1011 flow [2024-06-14 12:24:56,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 126 transitions, 951 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:24:56,221 INFO L231 Difference]: Finished difference. Result has 89 places, 112 transitions, 720 flow [2024-06-14 12:24:56,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=720, PETRI_PLACES=89, PETRI_TRANSITIONS=112} [2024-06-14 12:24:56,222 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-14 12:24:56,222 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 112 transitions, 720 flow [2024-06-14 12:24:56,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:56,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:56,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:56,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:24:56,223 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)] === [2024-06-14 12:24:56,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:56,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1715988206, now seen corresponding path program 1 times [2024-06-14 12:24:56,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:56,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90412317] [2024-06-14 12:24:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:56,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:24:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:24:57,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:24:57,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90412317] [2024-06-14 12:24:57,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90412317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:24:57,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:24:57,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:24:57,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59114763] [2024-06-14 12:24:57,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:24:57,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:24:57,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:24:57,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:24:57,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:24:57,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:24:57,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 112 transitions, 720 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:57,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:24:57,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:24:57,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:24:59,791 INFO L124 PetriNetUnfolderBase]: 9536/13550 cut-off events. [2024-06-14 12:24:59,791 INFO L125 PetriNetUnfolderBase]: For 108307/108315 co-relation queries the response was YES. [2024-06-14 12:24:59,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59407 conditions, 13550 events. 9536/13550 cut-off events. For 108307/108315 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 77170 event pairs, 3774 based on Foata normal form. 32/13539 useless extension candidates. Maximal degree in co-relation 59374. Up to 12344 conditions per place. [2024-06-14 12:24:59,892 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 132 selfloop transitions, 41 changer transitions 0/181 dead transitions. [2024-06-14 12:24:59,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 181 transitions, 1432 flow [2024-06-14 12:24:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:24:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:24:59,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-06-14 12:24:59,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2024-06-14 12:24:59,894 INFO L175 Difference]: Start difference. First operand has 89 places, 112 transitions, 720 flow. Second operand 9 states and 249 transitions. [2024-06-14 12:24:59,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 181 transitions, 1432 flow [2024-06-14 12:24:59,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 181 transitions, 1389 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:24:59,956 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 848 flow [2024-06-14 12:24:59,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=848, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2024-06-14 12:24:59,957 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-14 12:24:59,957 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 848 flow [2024-06-14 12:24:59,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:24:59,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:24:59,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:24:59,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:24:59,958 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)] === [2024-06-14 12:24:59,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:24:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1713131246, now seen corresponding path program 2 times [2024-06-14 12:24:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:24:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595305506] [2024-06-14 12:24:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:24:59,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:24:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:01,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:01,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595305506] [2024-06-14 12:25:01,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595305506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:01,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:01,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982682275] [2024-06-14 12:25:01,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:01,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:01,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:01,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:01,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 116 transitions, 848 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:01,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:01,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:01,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:03,296 INFO L124 PetriNetUnfolderBase]: 9467/13465 cut-off events. [2024-06-14 12:25:03,296 INFO L125 PetriNetUnfolderBase]: For 123119/123127 co-relation queries the response was YES. [2024-06-14 12:25:03,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60811 conditions, 13465 events. 9467/13465 cut-off events. For 123119/123127 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 76489 event pairs, 4411 based on Foata normal form. 38/13470 useless extension candidates. Maximal degree in co-relation 60777. Up to 12526 conditions per place. [2024-06-14 12:25:03,391 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 123 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-14 12:25:03,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 1346 flow [2024-06-14 12:25:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:03,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 12:25:03,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-14 12:25:03,393 INFO L175 Difference]: Start difference. First operand has 95 places, 116 transitions, 848 flow. Second operand 8 states and 218 transitions. [2024-06-14 12:25:03,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 1346 flow [2024-06-14 12:25:03,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 167 transitions, 1277 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:25:03,477 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 863 flow [2024-06-14 12:25:03,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=863, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2024-06-14 12:25:03,478 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2024-06-14 12:25:03,478 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 863 flow [2024-06-14 12:25:03,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:03,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:03,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:03,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:25:03,479 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)] === [2024-06-14 12:25:03,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash -17499714, now seen corresponding path program 3 times [2024-06-14 12:25:03,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:03,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056596675] [2024-06-14 12:25:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:04,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056596675] [2024-06-14 12:25:04,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056596675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:04,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:04,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:04,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877856239] [2024-06-14 12:25:04,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:04,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:04,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:04,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:04,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:04,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 863 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:04,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:04,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:04,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:06,850 INFO L124 PetriNetUnfolderBase]: 9631/13696 cut-off events. [2024-06-14 12:25:06,850 INFO L125 PetriNetUnfolderBase]: For 136823/136828 co-relation queries the response was YES. [2024-06-14 12:25:06,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63021 conditions, 13696 events. 9631/13696 cut-off events. For 136823/136828 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 77810 event pairs, 4110 based on Foata normal form. 30/13694 useless extension candidates. Maximal degree in co-relation 62985. Up to 12612 conditions per place. [2024-06-14 12:25:06,968 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 103 selfloop transitions, 55 changer transitions 0/166 dead transitions. [2024-06-14 12:25:06,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 166 transitions, 1385 flow [2024-06-14 12:25:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-14 12:25:06,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-14 12:25:06,970 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 863 flow. Second operand 8 states and 222 transitions. [2024-06-14 12:25:06,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 166 transitions, 1385 flow [2024-06-14 12:25:07,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1303 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:25:07,050 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 947 flow [2024-06-14 12:25:07,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=947, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-06-14 12:25:07,051 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-14 12:25:07,052 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 947 flow [2024-06-14 12:25:07,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:07,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:07,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:07,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:25:07,056 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)] === [2024-06-14 12:25:07,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:07,057 INFO L85 PathProgramCache]: Analyzing trace with hash -17315016, now seen corresponding path program 1 times [2024-06-14 12:25:07,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:07,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521355094] [2024-06-14 12:25:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:07,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:08,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:08,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521355094] [2024-06-14 12:25:08,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521355094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:08,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:08,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:08,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176820463] [2024-06-14 12:25:08,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:08,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:08,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:08,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:08,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:08,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 947 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:08,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:08,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:08,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:10,857 INFO L124 PetriNetUnfolderBase]: 9667/13762 cut-off events. [2024-06-14 12:25:10,858 INFO L125 PetriNetUnfolderBase]: For 157548/157559 co-relation queries the response was YES. [2024-06-14 12:25:10,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65280 conditions, 13762 events. 9667/13762 cut-off events. For 157548/157559 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 78357 event pairs, 4179 based on Foata normal form. 14/13682 useless extension candidates. Maximal degree in co-relation 65243. Up to 13022 conditions per place. [2024-06-14 12:25:10,949 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 127 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-14 12:25:10,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 170 transitions, 1500 flow [2024-06-14 12:25:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 12:25:10,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 12:25:10,951 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 947 flow. Second operand 8 states and 215 transitions. [2024-06-14 12:25:10,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 170 transitions, 1500 flow [2024-06-14 12:25:11,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 170 transitions, 1370 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:11,055 INFO L231 Difference]: Finished difference. Result has 102 places, 125 transitions, 990 flow [2024-06-14 12:25:11,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=990, PETRI_PLACES=102, PETRI_TRANSITIONS=125} [2024-06-14 12:25:11,056 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2024-06-14 12:25:11,056 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 125 transitions, 990 flow [2024-06-14 12:25:11,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:11,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:11,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:11,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:25:11,057 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)] === [2024-06-14 12:25:11,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1603674148, now seen corresponding path program 1 times [2024-06-14 12:25:11,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:11,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735818401] [2024-06-14 12:25:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:12,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735818401] [2024-06-14 12:25:12,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735818401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:12,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:12,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:25:12,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164843874] [2024-06-14 12:25:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:12,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:25:12,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:12,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:25:12,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:25:12,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:25:12,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 125 transitions, 990 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:12,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:12,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:25:12,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:14,025 INFO L124 PetriNetUnfolderBase]: 9173/13217 cut-off events. [2024-06-14 12:25:14,025 INFO L125 PetriNetUnfolderBase]: For 173977/173997 co-relation queries the response was YES. [2024-06-14 12:25:14,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65796 conditions, 13217 events. 9173/13217 cut-off events. For 173977/173997 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 77236 event pairs, 4172 based on Foata normal form. 22/13170 useless extension candidates. Maximal degree in co-relation 65757. Up to 12384 conditions per place. [2024-06-14 12:25:14,136 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 109 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-14 12:25:14,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 152 transitions, 1384 flow [2024-06-14 12:25:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:25:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:25:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 12:25:14,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:25:14,138 INFO L175 Difference]: Start difference. First operand has 102 places, 125 transitions, 990 flow. Second operand 6 states and 162 transitions. [2024-06-14 12:25:14,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 152 transitions, 1384 flow [2024-06-14 12:25:14,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 152 transitions, 1274 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:25:14,237 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 1005 flow [2024-06-14 12:25:14,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1005, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-06-14 12:25:14,237 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-14 12:25:14,238 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 1005 flow [2024-06-14 12:25:14,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:14,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:14,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:14,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:25:14,238 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)] === [2024-06-14 12:25:14,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:14,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1009498052, now seen corresponding path program 4 times [2024-06-14 12:25:14,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:14,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126108955] [2024-06-14 12:25:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:14,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:15,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:15,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126108955] [2024-06-14 12:25:15,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126108955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:15,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:15,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145005817] [2024-06-14 12:25:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:15,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:15,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 1005 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:15,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:15,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:15,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:17,565 INFO L124 PetriNetUnfolderBase]: 9761/13867 cut-off events. [2024-06-14 12:25:17,565 INFO L125 PetriNetUnfolderBase]: For 199207/199212 co-relation queries the response was YES. [2024-06-14 12:25:17,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71567 conditions, 13867 events. 9761/13867 cut-off events. For 199207/199212 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 78780 event pairs, 4054 based on Foata normal form. 30/13843 useless extension candidates. Maximal degree in co-relation 71527. Up to 12804 conditions per place. [2024-06-14 12:25:17,679 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 112 selfloop transitions, 57 changer transitions 0/177 dead transitions. [2024-06-14 12:25:17,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 177 transitions, 1563 flow [2024-06-14 12:25:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 12:25:17,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-14 12:25:17,681 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 1005 flow. Second operand 8 states and 218 transitions. [2024-06-14 12:25:17,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 177 transitions, 1563 flow [2024-06-14 12:25:17,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 177 transitions, 1480 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:17,783 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1102 flow [2024-06-14 12:25:17,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1102, PETRI_PLACES=107, PETRI_TRANSITIONS=131} [2024-06-14 12:25:17,784 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-14 12:25:17,784 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1102 flow [2024-06-14 12:25:17,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:17,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:17,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:17,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:25:17,785 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:17,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1009313354, now seen corresponding path program 2 times [2024-06-14 12:25:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:17,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354608651] [2024-06-14 12:25:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:19,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:19,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354608651] [2024-06-14 12:25:19,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354608651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:19,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:19,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:19,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076242270] [2024-06-14 12:25:19,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:19,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:19,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:19,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:19,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:19,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:19,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 131 transitions, 1102 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:19,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:19,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:19,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:21,499 INFO L124 PetriNetUnfolderBase]: 9819/14026 cut-off events. [2024-06-14 12:25:21,499 INFO L125 PetriNetUnfolderBase]: For 225331/225352 co-relation queries the response was YES. [2024-06-14 12:25:21,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74196 conditions, 14026 events. 9819/14026 cut-off events. For 225331/225352 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 80421 event pairs, 4207 based on Foata normal form. 20/13940 useless extension candidates. Maximal degree in co-relation 74155. Up to 13237 conditions per place. [2024-06-14 12:25:21,604 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 134 selfloop transitions, 39 changer transitions 0/181 dead transitions. [2024-06-14 12:25:21,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 181 transitions, 1689 flow [2024-06-14 12:25:21,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:21,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:25:21,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-14 12:25:21,606 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1102 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:25:21,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 181 transitions, 1689 flow [2024-06-14 12:25:21,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 181 transitions, 1545 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:21,732 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1162 flow [2024-06-14 12:25:21,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1162, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2024-06-14 12:25:21,732 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 53 predicate places. [2024-06-14 12:25:21,732 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1162 flow [2024-06-14 12:25:21,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:21,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:21,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:21,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:25:21,733 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:21,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:21,733 INFO L85 PathProgramCache]: Analyzing trace with hash -781412204, now seen corresponding path program 3 times [2024-06-14 12:25:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:21,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981549883] [2024-06-14 12:25:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:21,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:23,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:23,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981549883] [2024-06-14 12:25:23,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981549883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:23,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:23,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:23,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670332086] [2024-06-14 12:25:23,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:23,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:23,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:23,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:23,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1162 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:23,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:23,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:23,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:25,348 INFO L124 PetriNetUnfolderBase]: 9855/14062 cut-off events. [2024-06-14 12:25:25,348 INFO L125 PetriNetUnfolderBase]: For 250024/250045 co-relation queries the response was YES. [2024-06-14 12:25:25,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77076 conditions, 14062 events. 9855/14062 cut-off events. For 250024/250045 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 80392 event pairs, 4215 based on Foata normal form. 20/13976 useless extension candidates. Maximal degree in co-relation 77033. Up to 13289 conditions per place. [2024-06-14 12:25:25,463 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 136 selfloop transitions, 43 changer transitions 0/187 dead transitions. [2024-06-14 12:25:25,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 187 transitions, 1756 flow [2024-06-14 12:25:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 12:25:25,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-14 12:25:25,465 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1162 flow. Second operand 8 states and 211 transitions. [2024-06-14 12:25:25,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 187 transitions, 1756 flow [2024-06-14 12:25:25,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 187 transitions, 1618 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:25:25,593 INFO L231 Difference]: Finished difference. Result has 113 places, 145 transitions, 1222 flow [2024-06-14 12:25:25,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1222, PETRI_PLACES=113, PETRI_TRANSITIONS=145} [2024-06-14 12:25:25,593 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 56 predicate places. [2024-06-14 12:25:25,593 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 145 transitions, 1222 flow [2024-06-14 12:25:25,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:25,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:25,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:25,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:25:25,594 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:25,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:25,594 INFO L85 PathProgramCache]: Analyzing trace with hash -772841324, now seen corresponding path program 4 times [2024-06-14 12:25:25,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:25,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005779430] [2024-06-14 12:25:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:25,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:27,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:27,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005779430] [2024-06-14 12:25:27,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005779430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:27,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:27,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:25:27,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19699679] [2024-06-14 12:25:27,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:27,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:25:27,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:27,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:25:27,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:25:27,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:27,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 145 transitions, 1222 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:27,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:27,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:29,081 INFO L124 PetriNetUnfolderBase]: 9840/14009 cut-off events. [2024-06-14 12:25:29,081 INFO L125 PetriNetUnfolderBase]: For 275263/275284 co-relation queries the response was YES. [2024-06-14 12:25:29,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79027 conditions, 14009 events. 9840/14009 cut-off events. For 275263/275284 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 79815 event pairs, 3903 based on Foata normal form. 20/13923 useless extension candidates. Maximal degree in co-relation 78983. Up to 13140 conditions per place. [2024-06-14 12:25:29,211 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 129 selfloop transitions, 54 changer transitions 0/191 dead transitions. [2024-06-14 12:25:29,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 191 transitions, 1804 flow [2024-06-14 12:25:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:25:29,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:25:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:25:29,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-14 12:25:29,212 INFO L175 Difference]: Start difference. First operand has 113 places, 145 transitions, 1222 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:25:29,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 191 transitions, 1804 flow [2024-06-14 12:25:29,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 191 transitions, 1679 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:29,400 INFO L231 Difference]: Finished difference. Result has 117 places, 148 transitions, 1295 flow [2024-06-14 12:25:29,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1295, PETRI_PLACES=117, PETRI_TRANSITIONS=148} [2024-06-14 12:25:29,401 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-06-14 12:25:29,401 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 148 transitions, 1295 flow [2024-06-14 12:25:29,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:29,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:29,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:29,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:25:29,401 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:29,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:29,401 INFO L85 PathProgramCache]: Analyzing trace with hash -761077408, now seen corresponding path program 2 times [2024-06-14 12:25:29,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:29,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738022464] [2024-06-14 12:25:29,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:29,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:30,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:30,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738022464] [2024-06-14 12:25:30,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738022464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:30,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:30,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:25:30,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891000112] [2024-06-14 12:25:30,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:30,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:25:30,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:25:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:25:30,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:25:30,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 148 transitions, 1295 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:30,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:30,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:25:30,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:32,074 INFO L124 PetriNetUnfolderBase]: 9299/13424 cut-off events. [2024-06-14 12:25:32,074 INFO L125 PetriNetUnfolderBase]: For 291119/291134 co-relation queries the response was YES. [2024-06-14 12:25:32,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77397 conditions, 13424 events. 9299/13424 cut-off events. For 291119/291134 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 78668 event pairs, 4168 based on Foata normal form. 15/13363 useless extension candidates. Maximal degree in co-relation 77352. Up to 12542 conditions per place. [2024-06-14 12:25:32,186 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 115 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-14 12:25:32,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 170 transitions, 1715 flow [2024-06-14 12:25:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:25:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:25:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 12:25:32,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-14 12:25:32,187 INFO L175 Difference]: Start difference. First operand has 117 places, 148 transitions, 1295 flow. Second operand 6 states and 158 transitions. [2024-06-14 12:25:32,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 170 transitions, 1715 flow [2024-06-14 12:25:32,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 170 transitions, 1543 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:25:32,349 INFO L231 Difference]: Finished difference. Result has 117 places, 152 transitions, 1274 flow [2024-06-14 12:25:32,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1274, PETRI_PLACES=117, PETRI_TRANSITIONS=152} [2024-06-14 12:25:32,350 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 60 predicate places. [2024-06-14 12:25:32,350 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 152 transitions, 1274 flow [2024-06-14 12:25:32,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:32,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:32,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:32,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:25:32,350 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:32,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1612059944, now seen corresponding path program 1 times [2024-06-14 12:25:32,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:32,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105798927] [2024-06-14 12:25:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:32,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:33,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:33,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105798927] [2024-06-14 12:25:33,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105798927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:33,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:33,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:25:33,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138757011] [2024-06-14 12:25:33,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:33,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:25:33,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:33,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:25:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:25:33,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:25:33,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 152 transitions, 1274 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:33,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:33,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:25:33,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:35,109 INFO L124 PetriNetUnfolderBase]: 8708/12696 cut-off events. [2024-06-14 12:25:35,109 INFO L125 PetriNetUnfolderBase]: For 279398/279400 co-relation queries the response was YES. [2024-06-14 12:25:35,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75252 conditions, 12696 events. 8708/12696 cut-off events. For 279398/279400 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 74701 event pairs, 3599 based on Foata normal form. 4/12628 useless extension candidates. Maximal degree in co-relation 75206. Up to 11906 conditions per place. [2024-06-14 12:25:35,217 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 155 selfloop transitions, 14 changer transitions 0/178 dead transitions. [2024-06-14 12:25:35,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 178 transitions, 1752 flow [2024-06-14 12:25:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:25:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:25:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:25:35,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-14 12:25:35,218 INFO L175 Difference]: Start difference. First operand has 117 places, 152 transitions, 1274 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:25:35,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 178 transitions, 1752 flow [2024-06-14 12:25:35,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 178 transitions, 1641 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:35,410 INFO L231 Difference]: Finished difference. Result has 119 places, 156 transitions, 1274 flow [2024-06-14 12:25:35,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1274, PETRI_PLACES=119, PETRI_TRANSITIONS=156} [2024-06-14 12:25:35,410 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-14 12:25:35,410 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 156 transitions, 1274 flow [2024-06-14 12:25:35,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:35,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:35,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:35,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:25:35,411 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:35,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1592240356, now seen corresponding path program 2 times [2024-06-14 12:25:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:35,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357287577] [2024-06-14 12:25:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:35,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357287577] [2024-06-14 12:25:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357287577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:36,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:25:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321872287] [2024-06-14 12:25:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:25:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:25:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:25:36,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:25:36,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 156 transitions, 1274 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:36,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:36,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:25:36,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:38,158 INFO L124 PetriNetUnfolderBase]: 8717/12745 cut-off events. [2024-06-14 12:25:38,158 INFO L125 PetriNetUnfolderBase]: For 300400/300408 co-relation queries the response was YES. [2024-06-14 12:25:38,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77874 conditions, 12745 events. 8717/12745 cut-off events. For 300400/300408 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 75327 event pairs, 3588 based on Foata normal form. 8/12694 useless extension candidates. Maximal degree in co-relation 77827. Up to 11891 conditions per place. [2024-06-14 12:25:38,267 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 150 selfloop transitions, 21 changer transitions 0/180 dead transitions. [2024-06-14 12:25:38,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 180 transitions, 1762 flow [2024-06-14 12:25:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:25:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:25:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:25:38,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-14 12:25:38,268 INFO L175 Difference]: Start difference. First operand has 119 places, 156 transitions, 1274 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:25:38,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 180 transitions, 1762 flow [2024-06-14 12:25:38,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 180 transitions, 1681 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:38,473 INFO L231 Difference]: Finished difference. Result has 121 places, 160 transitions, 1326 flow [2024-06-14 12:25:38,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1326, PETRI_PLACES=121, PETRI_TRANSITIONS=160} [2024-06-14 12:25:38,473 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-14 12:25:38,474 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 160 transitions, 1326 flow [2024-06-14 12:25:38,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:38,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:38,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:38,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:25:38,474 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:38,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:38,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1592232420, now seen corresponding path program 1 times [2024-06-14 12:25:38,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:38,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423308549] [2024-06-14 12:25:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:40,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:40,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423308549] [2024-06-14 12:25:40,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423308549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:40,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:40,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:25:40,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022978710] [2024-06-14 12:25:40,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:40,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:25:40,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:25:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:25:40,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:25:40,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 160 transitions, 1326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:40,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:40,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:25:40,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:41,892 INFO L124 PetriNetUnfolderBase]: 9861/14277 cut-off events. [2024-06-14 12:25:41,892 INFO L125 PetriNetUnfolderBase]: For 380403/380436 co-relation queries the response was YES. [2024-06-14 12:25:41,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89714 conditions, 14277 events. 9861/14277 cut-off events. For 380403/380436 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 84447 event pairs, 4360 based on Foata normal form. 17/14204 useless extension candidates. Maximal degree in co-relation 89666. Up to 13348 conditions per place. [2024-06-14 12:25:42,020 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 152 selfloop transitions, 18 changer transitions 0/190 dead transitions. [2024-06-14 12:25:42,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 190 transitions, 1829 flow [2024-06-14 12:25:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:25:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:25:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 12:25:42,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-14 12:25:42,021 INFO L175 Difference]: Start difference. First operand has 121 places, 160 transitions, 1326 flow. Second operand 7 states and 179 transitions. [2024-06-14 12:25:42,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 190 transitions, 1829 flow [2024-06-14 12:25:42,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 190 transitions, 1721 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:42,283 INFO L231 Difference]: Finished difference. Result has 125 places, 168 transitions, 1373 flow [2024-06-14 12:25:42,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1373, PETRI_PLACES=125, PETRI_TRANSITIONS=168} [2024-06-14 12:25:42,284 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2024-06-14 12:25:42,284 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 168 transitions, 1373 flow [2024-06-14 12:25:42,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:42,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:42,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:42,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:25:42,285 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:42,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:42,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2012292142, now seen corresponding path program 1 times [2024-06-14 12:25:42,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:42,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594157575] [2024-06-14 12:25:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:42,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:43,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:43,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594157575] [2024-06-14 12:25:43,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594157575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:43,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:43,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:43,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314270601] [2024-06-14 12:25:43,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:43,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:43,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:43,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:43,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:44,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:44,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 168 transitions, 1373 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:44,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:44,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:44,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:46,430 INFO L124 PetriNetUnfolderBase]: 11317/16097 cut-off events. [2024-06-14 12:25:46,430 INFO L125 PetriNetUnfolderBase]: For 458569/458574 co-relation queries the response was YES. [2024-06-14 12:25:46,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105866 conditions, 16097 events. 11317/16097 cut-off events. For 458569/458574 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 92930 event pairs, 4557 based on Foata normal form. 18/16053 useless extension candidates. Maximal degree in co-relation 105816. Up to 14644 conditions per place. [2024-06-14 12:25:46,594 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 151 selfloop transitions, 79 changer transitions 0/239 dead transitions. [2024-06-14 12:25:46,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 239 transitions, 2244 flow [2024-06-14 12:25:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-14 12:25:46,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082304526748971 [2024-06-14 12:25:46,596 INFO L175 Difference]: Start difference. First operand has 125 places, 168 transitions, 1373 flow. Second operand 9 states and 247 transitions. [2024-06-14 12:25:46,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 239 transitions, 2244 flow [2024-06-14 12:25:46,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 239 transitions, 2151 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:46,897 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 1702 flow [2024-06-14 12:25:46,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1702, PETRI_PLACES=132, PETRI_TRANSITIONS=184} [2024-06-14 12:25:46,898 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-06-14 12:25:46,898 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 1702 flow [2024-06-14 12:25:46,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:46,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:46,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:46,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:25:46,898 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:46,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash -186182230, now seen corresponding path program 2 times [2024-06-14 12:25:46,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:46,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319103498] [2024-06-14 12:25:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:46,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:48,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319103498] [2024-06-14 12:25:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319103498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:48,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323848358] [2024-06-14 12:25:48,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:48,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:48,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:48,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:48,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 1702 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:48,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:48,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:48,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:51,636 INFO L124 PetriNetUnfolderBase]: 11559/16495 cut-off events. [2024-06-14 12:25:51,637 INFO L125 PetriNetUnfolderBase]: For 504263/504268 co-relation queries the response was YES. [2024-06-14 12:25:51,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111578 conditions, 16495 events. 11559/16495 cut-off events. For 504263/504268 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 95799 event pairs, 4611 based on Foata normal form. 18/16451 useless extension candidates. Maximal degree in co-relation 111525. Up to 15167 conditions per place. [2024-06-14 12:25:51,787 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 153 selfloop transitions, 86 changer transitions 0/248 dead transitions. [2024-06-14 12:25:51,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 248 transitions, 2543 flow [2024-06-14 12:25:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-14 12:25:51,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-14 12:25:51,789 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 1702 flow. Second operand 9 states and 244 transitions. [2024-06-14 12:25:51,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 248 transitions, 2543 flow [2024-06-14 12:25:52,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 248 transitions, 2359 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 12:25:52,148 INFO L231 Difference]: Finished difference. Result has 139 places, 196 transitions, 1921 flow [2024-06-14 12:25:52,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1921, PETRI_PLACES=139, PETRI_TRANSITIONS=196} [2024-06-14 12:25:52,149 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 82 predicate places. [2024-06-14 12:25:52,149 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 196 transitions, 1921 flow [2024-06-14 12:25:52,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:52,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:52,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:52,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:25:52,150 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:52,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:52,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1811724040, now seen corresponding path program 3 times [2024-06-14 12:25:52,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:52,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409669916] [2024-06-14 12:25:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:52,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409669916] [2024-06-14 12:25:54,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409669916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:54,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:54,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:54,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120260353] [2024-06-14 12:25:54,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:54,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:54,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:54,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:54,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:54,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:54,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 196 transitions, 1921 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:54,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:54,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:54,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:25:57,335 INFO L124 PetriNetUnfolderBase]: 11919/17009 cut-off events. [2024-06-14 12:25:57,335 INFO L125 PetriNetUnfolderBase]: For 570293/570298 co-relation queries the response was YES. [2024-06-14 12:25:57,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116713 conditions, 17009 events. 11919/17009 cut-off events. For 570293/570298 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 99131 event pairs, 4415 based on Foata normal form. 18/16916 useless extension candidates. Maximal degree in co-relation 116657. Up to 14694 conditions per place. [2024-06-14 12:25:57,507 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 142 selfloop transitions, 106 changer transitions 0/257 dead transitions. [2024-06-14 12:25:57,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 257 transitions, 2917 flow [2024-06-14 12:25:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:25:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:25:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2024-06-14 12:25:57,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-14 12:25:57,509 INFO L175 Difference]: Start difference. First operand has 139 places, 196 transitions, 1921 flow. Second operand 9 states and 246 transitions. [2024-06-14 12:25:57,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 257 transitions, 2917 flow [2024-06-14 12:25:57,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 257 transitions, 2760 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 12:25:57,930 INFO L231 Difference]: Finished difference. Result has 146 places, 202 transitions, 2232 flow [2024-06-14 12:25:57,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2232, PETRI_PLACES=146, PETRI_TRANSITIONS=202} [2024-06-14 12:25:57,930 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-14 12:25:57,930 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 202 transitions, 2232 flow [2024-06-14 12:25:57,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:57,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:25:57,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:25:57,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:25:57,931 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:25:57,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:25:57,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1223941594, now seen corresponding path program 4 times [2024-06-14 12:25:57,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:25:57,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398513339] [2024-06-14 12:25:57,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:25:57,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:25:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:25:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:25:59,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:25:59,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398513339] [2024-06-14 12:25:59,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398513339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:25:59,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:25:59,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:25:59,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394510164] [2024-06-14 12:25:59,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:25:59,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:25:59,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:25:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:25:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:25:59,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:25:59,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 202 transitions, 2232 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:25:59,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:25:59,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:25:59,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:03,774 INFO L124 PetriNetUnfolderBase]: 11704/16750 cut-off events. [2024-06-14 12:26:03,775 INFO L125 PetriNetUnfolderBase]: For 570590/570595 co-relation queries the response was YES. [2024-06-14 12:26:03,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115031 conditions, 16750 events. 11704/16750 cut-off events. For 570590/570595 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 97874 event pairs, 4638 based on Foata normal form. 18/16706 useless extension candidates. Maximal degree in co-relation 114973. Up to 15390 conditions per place. [2024-06-14 12:26:04,005 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 160 selfloop transitions, 84 changer transitions 0/253 dead transitions. [2024-06-14 12:26:04,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 253 transitions, 2864 flow [2024-06-14 12:26:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:26:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:26:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-14 12:26:04,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-14 12:26:04,007 INFO L175 Difference]: Start difference. First operand has 146 places, 202 transitions, 2232 flow. Second operand 9 states and 244 transitions. [2024-06-14 12:26:04,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 253 transitions, 2864 flow [2024-06-14 12:26:04,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 253 transitions, 2686 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:04,662 INFO L231 Difference]: Finished difference. Result has 149 places, 201 transitions, 2185 flow [2024-06-14 12:26:04,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2185, PETRI_PLACES=149, PETRI_TRANSITIONS=201} [2024-06-14 12:26:04,663 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 92 predicate places. [2024-06-14 12:26:04,663 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 201 transitions, 2185 flow [2024-06-14 12:26:04,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:04,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:04,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:04,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:26:04,664 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:26:04,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:04,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1565631202, now seen corresponding path program 1 times [2024-06-14 12:26:04,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:04,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116029226] [2024-06-14 12:26:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:04,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:06,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:06,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116029226] [2024-06-14 12:26:06,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116029226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:06,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:06,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:26:06,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950812117] [2024-06-14 12:26:06,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:06,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:26:06,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:06,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:26:06,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:26:06,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:26:06,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 201 transitions, 2185 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:06,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:06,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:26:06,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:09,136 INFO L124 PetriNetUnfolderBase]: 10305/15103 cut-off events. [2024-06-14 12:26:09,136 INFO L125 PetriNetUnfolderBase]: For 497448/497450 co-relation queries the response was YES. [2024-06-14 12:26:09,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102845 conditions, 15103 events. 10305/15103 cut-off events. For 497448/497450 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 91307 event pairs, 3929 based on Foata normal form. 2/15026 useless extension candidates. Maximal degree in co-relation 102785. Up to 14143 conditions per place. [2024-06-14 12:26:09,335 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 205 selfloop transitions, 18 changer transitions 0/233 dead transitions. [2024-06-14 12:26:09,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 233 transitions, 2811 flow [2024-06-14 12:26:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:26:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:26:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:26:09,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-14 12:26:09,337 INFO L175 Difference]: Start difference. First operand has 149 places, 201 transitions, 2185 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:26:09,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 233 transitions, 2811 flow [2024-06-14 12:26:09,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 233 transitions, 2524 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-14 12:26:09,798 INFO L231 Difference]: Finished difference. Result has 147 places, 205 transitions, 2043 flow [2024-06-14 12:26:09,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2043, PETRI_PLACES=147, PETRI_TRANSITIONS=205} [2024-06-14 12:26:09,798 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 90 predicate places. [2024-06-14 12:26:09,798 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 205 transitions, 2043 flow [2024-06-14 12:26:09,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:09,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:09,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:09,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:26:09,799 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:26:09,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2114562632, now seen corresponding path program 1 times [2024-06-14 12:26:09,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:09,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681382917] [2024-06-14 12:26:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:11,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681382917] [2024-06-14 12:26:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681382917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:11,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:11,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:26:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404492435] [2024-06-14 12:26:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:11,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:26:11,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:26:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:26:11,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:26:11,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 205 transitions, 2043 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:11,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:11,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:26:11,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:14,474 INFO L124 PetriNetUnfolderBase]: 10424/15191 cut-off events. [2024-06-14 12:26:14,474 INFO L125 PetriNetUnfolderBase]: For 581784/581801 co-relation queries the response was YES. [2024-06-14 12:26:14,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105955 conditions, 15191 events. 10424/15191 cut-off events. For 581784/581801 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 91362 event pairs, 4273 based on Foata normal form. 19/15079 useless extension candidates. Maximal degree in co-relation 105897. Up to 14235 conditions per place. [2024-06-14 12:26:14,815 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 194 selfloop transitions, 21 changer transitions 0/235 dead transitions. [2024-06-14 12:26:14,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 235 transitions, 2641 flow [2024-06-14 12:26:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 12:26:14,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2024-06-14 12:26:14,816 INFO L175 Difference]: Start difference. First operand has 147 places, 205 transitions, 2043 flow. Second operand 8 states and 201 transitions. [2024-06-14 12:26:14,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 235 transitions, 2641 flow [2024-06-14 12:26:15,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 235 transitions, 2526 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 12:26:15,253 INFO L231 Difference]: Finished difference. Result has 150 places, 208 transitions, 2070 flow [2024-06-14 12:26:15,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2070, PETRI_PLACES=150, PETRI_TRANSITIONS=208} [2024-06-14 12:26:15,253 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-06-14 12:26:15,254 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 208 transitions, 2070 flow [2024-06-14 12:26:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:15,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:15,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:15,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:26:15,254 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:26:15,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash 704978592, now seen corresponding path program 1 times [2024-06-14 12:26:15,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:15,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060020200] [2024-06-14 12:26:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:15,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:16,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:16,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060020200] [2024-06-14 12:26:16,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060020200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:16,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:16,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:26:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451574051] [2024-06-14 12:26:16,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:26:16,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:16,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:26:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:26:16,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:26:16,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 208 transitions, 2070 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:16,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:16,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:26:16,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:18,852 INFO L124 PetriNetUnfolderBase]: 10444/15465 cut-off events. [2024-06-14 12:26:18,852 INFO L125 PetriNetUnfolderBase]: For 613901/613934 co-relation queries the response was YES. [2024-06-14 12:26:18,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108467 conditions, 15465 events. 10444/15465 cut-off events. For 613901/613934 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 94939 event pairs, 4292 based on Foata normal form. 16/15309 useless extension candidates. Maximal degree in co-relation 108408. Up to 14272 conditions per place. [2024-06-14 12:26:18,992 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 193 selfloop transitions, 10 changer transitions 0/223 dead transitions. [2024-06-14 12:26:18,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 223 transitions, 2588 flow [2024-06-14 12:26:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:26:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:26:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 12:26:18,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-14 12:26:18,993 INFO L175 Difference]: Start difference. First operand has 150 places, 208 transitions, 2070 flow. Second operand 5 states and 128 transitions. [2024-06-14 12:26:18,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 223 transitions, 2588 flow [2024-06-14 12:26:19,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 223 transitions, 2470 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 12:26:19,420 INFO L231 Difference]: Finished difference. Result has 149 places, 212 transitions, 2065 flow [2024-06-14 12:26:19,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1952, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2065, PETRI_PLACES=149, PETRI_TRANSITIONS=212} [2024-06-14 12:26:19,420 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 92 predicate places. [2024-06-14 12:26:19,420 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 212 transitions, 2065 flow [2024-06-14 12:26:19,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:19,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:19,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:19,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:26:19,421 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:26:19,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:19,421 INFO L85 PathProgramCache]: Analyzing trace with hash 756747451, now seen corresponding path program 1 times [2024-06-14 12:26:19,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:19,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644859625] [2024-06-14 12:26:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:19,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:20,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:20,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644859625] [2024-06-14 12:26:20,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644859625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:20,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:20,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:26:20,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948905342] [2024-06-14 12:26:20,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:20,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:26:20,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:26:20,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:26:20,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:26:20,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 212 transitions, 2065 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:20,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:20,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:26:20,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:26:23,904 INFO L124 PetriNetUnfolderBase]: 12019/17249 cut-off events. [2024-06-14 12:26:23,904 INFO L125 PetriNetUnfolderBase]: For 734538/734548 co-relation queries the response was YES. [2024-06-14 12:26:23,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126703 conditions, 17249 events. 12019/17249 cut-off events. For 734538/734548 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 101311 event pairs, 4711 based on Foata normal form. 12/17250 useless extension candidates. Maximal degree in co-relation 126643. Up to 16338 conditions per place. [2024-06-14 12:26:24,056 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 211 selfloop transitions, 39 changer transitions 0/259 dead transitions. [2024-06-14 12:26:24,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 259 transitions, 2881 flow [2024-06-14 12:26:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:26:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:26:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 12:26:24,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2024-06-14 12:26:24,057 INFO L175 Difference]: Start difference. First operand has 149 places, 212 transitions, 2065 flow. Second operand 8 states and 199 transitions. [2024-06-14 12:26:24,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 259 transitions, 2881 flow [2024-06-14 12:26:24,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 259 transitions, 2794 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 12:26:24,442 INFO L231 Difference]: Finished difference. Result has 157 places, 228 transitions, 2325 flow [2024-06-14 12:26:24,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2325, PETRI_PLACES=157, PETRI_TRANSITIONS=228} [2024-06-14 12:26:24,443 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 100 predicate places. [2024-06-14 12:26:24,443 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 228 transitions, 2325 flow [2024-06-14 12:26:24,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:24,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:26:24,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:26:24,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:26:24,443 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:26:24,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:26:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 762461371, now seen corresponding path program 2 times [2024-06-14 12:26:24,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:26:24,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273058599] [2024-06-14 12:26:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:26:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:26:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:26:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:26:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:26:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273058599] [2024-06-14 12:26:25,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273058599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:26:25,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:26:25,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:26:25,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547062698] [2024-06-14 12:26:25,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:26:25,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:26:25,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:26:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:26:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:26:25,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:26:25,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 228 transitions, 2325 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:26:25,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:26:25,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:26:25,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand