./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 22:04:53,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 22:04:53,704 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 22:04:53,707 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 22:04:53,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 22:04:53,730 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 22:04:53,730 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 22:04:53,730 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 22:04:53,731 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 22:04:53,731 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 22:04:53,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 22:04:53,748 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 22:04:53,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 22:04:53,748 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 22:04:53,749 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 22:04:53,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 22:04:53,749 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 22:04:53,750 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 22:04:53,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 22:04:53,750 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 22:04:53,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 22:04:53,751 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 22:04:53,751 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 22:04:53,752 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 22:04:53,752 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 22:04:53,752 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 22:04:53,752 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 22:04:53,753 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 22:04:53,753 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 22:04:53,753 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 22:04:53,753 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 22:04:53,754 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 22:04:53,754 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:04:53,754 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 22:04:53,754 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 22:04:53,755 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 22:04:53,755 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 22:04:53,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 22:04:53,755 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 22:04:53,756 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 22:04:53,756 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 22:04:53,756 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 22:04:53,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 22:04:53,757 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 22:04:53,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 22:04:53,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 22:04:53,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 22:04:53,976 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 22:04:53,976 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 22:04:53,977 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe027_power.opt.yml/witness.yml [2024-06-21 22:04:54,202 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 22:04:54,203 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 22:04:54,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2024-06-21 22:04:55,320 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 22:04:55,527 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 22:04:55,528 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2024-06-21 22:04:55,541 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6454f1d4/e24072524d234ddd9bd7f4c134e80dad/FLAG641791b07 [2024-06-21 22:04:55,551 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6454f1d4/e24072524d234ddd9bd7f4c134e80dad [2024-06-21 22:04:55,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 22:04:55,553 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 22:04:55,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 22:04:55,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 22:04:55,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 22:04:55,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:04:54" (1/2) ... [2024-06-21 22:04:55,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673966ff and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:04:55, skipping insertion in model container [2024-06-21 22:04:55,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:04:54" (1/2) ... [2024-06-21 22:04:55,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2905e5ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:04:55, skipping insertion in model container [2024-06-21 22:04:55,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:04:55" (2/2) ... [2024-06-21 22:04:55,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673966ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:55, skipping insertion in model container [2024-06-21 22:04:55,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:04:55" (2/2) ... [2024-06-21 22:04:55,564 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 22:04:55,719 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 22:04:55,719 INFO L97 edCorrectnessWitness]: Location invariant before [L887-L887] (((((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd4 == (_Bool)0) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) [2024-06-21 22:04:55,720 INFO L97 edCorrectnessWitness]: Location invariant before [L892-L892] (((((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd4 == (_Bool)0) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) [2024-06-21 22:04:55,720 INFO L97 edCorrectnessWitness]: Location invariant before [L889-L889] (((((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd4 == (_Bool)0) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) [2024-06-21 22:04:55,720 INFO L97 edCorrectnessWitness]: Location invariant before [L891-L891] (((((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd4 == (_Bool)0) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) [2024-06-21 22:04:55,720 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 22:04:55,720 INFO L106 edCorrectnessWitness]: ghost_update [L885-L885] multithreaded = 1; [2024-06-21 22:04:55,758 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 22:04:56,086 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:04:56,104 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 22:04:56,318 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:04:56,357 INFO L206 MainTranslator]: Completed translation [2024-06-21 22:04:56,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56 WrapperNode [2024-06-21 22:04:56,357 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 22:04:56,358 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 22:04:56,358 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 22:04:56,358 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 22:04:56,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,435 INFO L138 Inliner]: procedures = 176, calls = 105, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 290 [2024-06-21 22:04:56,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 22:04:56,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 22:04:56,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 22:04:56,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 22:04:56,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,491 INFO L175 MemorySlicer]: Split 58 memory accesses to 2 slices as follows [2, 56]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-21 22:04:56,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,520 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,531 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,533 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 22:04:56,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 22:04:56,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 22:04:56,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 22:04:56,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (1/1) ... [2024-06-21 22:04:56,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:04:56,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 22:04:56,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 22:04:56,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 22:04:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 22:04:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 22:04:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 22:04:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 22:04:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 22:04:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 22:04:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 22:04:56,599 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 22:04:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 22:04:56,599 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 22:04:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 22:04:56,600 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 22:04:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 22:04:56,601 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 22:04:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 22:04:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 22:04:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 22:04:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 22:04:56,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 22:04:56,603 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 22:04:56,760 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 22:04:56,761 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 22:04:57,223 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 22:04:57,223 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 22:04:57,695 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 22:04:57,696 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 22:04:57,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:04:57 BoogieIcfgContainer [2024-06-21 22:04:57,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 22:04:57,700 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 22:04:57,700 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 22:04:57,702 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 22:04:57,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:04:54" (1/4) ... [2024-06-21 22:04:57,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47675a08 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:04:57, skipping insertion in model container [2024-06-21 22:04:57,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 10:04:55" (2/4) ... [2024-06-21 22:04:57,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47675a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:04:57, skipping insertion in model container [2024-06-21 22:04:57,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:04:56" (3/4) ... [2024-06-21 22:04:57,704 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47675a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:04:57, skipping insertion in model container [2024-06-21 22:04:57,704 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:04:57" (4/4) ... [2024-06-21 22:04:57,705 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.opt.i [2024-06-21 22:04:57,719 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 22:04:57,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 22:04:57,720 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 22:04:57,793 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 22:04:57,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 22:04:57,892 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 22:04:57,892 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:04:57,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 22:04:57,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 22:04:57,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 22:04:57,911 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 22:04:57,918 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;@4bce27ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 22:04:57,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 22:04:57,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 22:04:57,923 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 22:04:57,923 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:04:57,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:04:57,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 22:04:57,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:04:57,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:04:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash 992412864, now seen corresponding path program 1 times [2024-06-21 22:04:57,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:04:57,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873582470] [2024-06-21 22:04:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:04:57,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:04:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:04:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:04:59,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:04:59,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873582470] [2024-06-21 22:04:59,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873582470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:04:59,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:04:59,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 22:04:59,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374029121] [2024-06-21 22:04:59,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:04:59,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:04:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:04:59,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:04:59,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:04:59,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 22:04:59,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:04:59,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:04:59,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 22:04:59,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:01,278 INFO L124 PetriNetUnfolderBase]: 5551/7794 cut-off events. [2024-06-21 22:05:01,278 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-06-21 22:05:01,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15714 conditions, 7794 events. 5551/7794 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 41685 event pairs, 3349 based on Foata normal form. 2/7672 useless extension candidates. Maximal degree in co-relation 15701. Up to 7623 conditions per place. [2024-06-21 22:05:01,323 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 47 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-21 22:05:01,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 245 flow [2024-06-21 22:05:01,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:05:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:05:01,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-21 22:05:01,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-21 22:05:01,338 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 92 transitions. [2024-06-21 22:05:01,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 245 flow [2024-06-21 22:05:01,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:01,354 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 22:05:01,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 22:05:01,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 22:05:01,366 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 22:05:01,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:01,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:01,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:01,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 22:05:01,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:01,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:01,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1598980462, now seen corresponding path program 1 times [2024-06-21 22:05:01,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:01,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707598423] [2024-06-21 22:05:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:01,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:04,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:04,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707598423] [2024-06-21 22:05:04,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707598423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:04,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:04,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:05:04,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910402863] [2024-06-21 22:05:04,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:04,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:05:04,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:05:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:05:04,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:05:04,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:04,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:04,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:05:04,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:05,891 INFO L124 PetriNetUnfolderBase]: 7050/9849 cut-off events. [2024-06-21 22:05:05,892 INFO L125 PetriNetUnfolderBase]: For 1780/1780 co-relation queries the response was YES. [2024-06-21 22:05:05,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22571 conditions, 9849 events. 7050/9849 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 51539 event pairs, 3276 based on Foata normal form. 8/9850 useless extension candidates. Maximal degree in co-relation 22559. Up to 9559 conditions per place. [2024-06-21 22:05:05,941 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 58 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-06-21 22:05:05,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 331 flow [2024-06-21 22:05:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 22:05:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 22:05:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-06-21 22:05:05,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-21 22:05:05,946 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 114 transitions. [2024-06-21 22:05:05,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 331 flow [2024-06-21 22:05:05,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 22:05:05,952 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 166 flow [2024-06-21 22:05:05,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-21 22:05:05,954 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-06-21 22:05:05,954 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 166 flow [2024-06-21 22:05:05,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:05,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:05,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:05,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 22:05:05,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:05,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:05,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1634831288, now seen corresponding path program 1 times [2024-06-21 22:05:05,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:05,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797331955] [2024-06-21 22:05:05,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:05,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:07,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:07,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797331955] [2024-06-21 22:05:07,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797331955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:07,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:07,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:05:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373273706] [2024-06-21 22:05:07,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:07,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:05:07,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:07,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:05:07,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:05:07,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:05:07,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:07,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:07,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:05:07,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:09,123 INFO L124 PetriNetUnfolderBase]: 5553/7819 cut-off events. [2024-06-21 22:05:09,124 INFO L125 PetriNetUnfolderBase]: For 3944/3944 co-relation queries the response was YES. [2024-06-21 22:05:09,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19744 conditions, 7819 events. 5553/7819 cut-off events. For 3944/3944 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41911 event pairs, 3002 based on Foata normal form. 6/7822 useless extension candidates. Maximal degree in co-relation 19729. Up to 7613 conditions per place. [2024-06-21 22:05:09,157 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 62 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-21 22:05:09,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 404 flow [2024-06-21 22:05:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:05:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:05:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 22:05:09,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-06-21 22:05:09,159 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 166 flow. Second operand 5 states and 123 transitions. [2024-06-21 22:05:09,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 404 flow [2024-06-21 22:05:09,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 380 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 22:05:09,162 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 232 flow [2024-06-21 22:05:09,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-21 22:05:09,163 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-06-21 22:05:09,163 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 232 flow [2024-06-21 22:05:09,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:09,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:09,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:09,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 22:05:09,164 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)] === [2024-06-21 22:05:09,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:09,164 INFO L85 PathProgramCache]: Analyzing trace with hash -859834988, now seen corresponding path program 1 times [2024-06-21 22:05:09,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:09,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872766679] [2024-06-21 22:05:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:09,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:11,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872766679] [2024-06-21 22:05:11,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872766679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:11,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:11,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:05:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814464592] [2024-06-21 22:05:11,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:11,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:05:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:11,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:05:11,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:05:11,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:05:11,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:11,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:11,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:05:11,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:12,925 INFO L124 PetriNetUnfolderBase]: 5544/7821 cut-off events. [2024-06-21 22:05:12,925 INFO L125 PetriNetUnfolderBase]: For 7876/7876 co-relation queries the response was YES. [2024-06-21 22:05:12,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22460 conditions, 7821 events. 5544/7821 cut-off events. For 7876/7876 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41647 event pairs, 2892 based on Foata normal form. 3/7821 useless extension candidates. Maximal degree in co-relation 22442. Up to 7601 conditions per place. [2024-06-21 22:05:12,960 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 74 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-21 22:05:12,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 95 transitions, 533 flow [2024-06-21 22:05:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 22:05:12,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 22:05:12,963 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 232 flow. Second operand 6 states and 146 transitions. [2024-06-21 22:05:12,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 95 transitions, 533 flow [2024-06-21 22:05:12,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 502 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 22:05:12,969 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 308 flow [2024-06-21 22:05:12,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-21 22:05:12,970 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2024-06-21 22:05:12,971 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 308 flow [2024-06-21 22:05:12,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:12,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:12,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:12,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 22:05:12,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:12,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash -885078185, now seen corresponding path program 1 times [2024-06-21 22:05:12,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:12,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141964667] [2024-06-21 22:05:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:12,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:15,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141964667] [2024-06-21 22:05:15,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141964667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:15,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:15,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:05:15,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079647123] [2024-06-21 22:05:15,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:15,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:05:15,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:05:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:05:15,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:05:15,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 22:05:15,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:15,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:05:15,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:17,688 INFO L124 PetriNetUnfolderBase]: 5756/8131 cut-off events. [2024-06-21 22:05:17,693 INFO L125 PetriNetUnfolderBase]: For 13311/13311 co-relation queries the response was YES. [2024-06-21 22:05:17,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25716 conditions, 8131 events. 5756/8131 cut-off events. For 13311/13311 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43432 event pairs, 2787 based on Foata normal form. 39/8167 useless extension candidates. Maximal degree in co-relation 25695. Up to 7591 conditions per place. [2024-06-21 22:05:17,761 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 85 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-21 22:05:17,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 698 flow [2024-06-21 22:05:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 22:05:17,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49175824175824173 [2024-06-21 22:05:17,764 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 308 flow. Second operand 7 states and 179 transitions. [2024-06-21 22:05:17,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 698 flow [2024-06-21 22:05:17,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 675 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 22:05:17,769 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 428 flow [2024-06-21 22:05:17,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=428, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-21 22:05:17,771 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2024-06-21 22:05:17,772 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 428 flow [2024-06-21 22:05:17,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-21 22:05:17,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:17,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:17,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 22:05:17,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:17,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash -983861901, now seen corresponding path program 1 times [2024-06-21 22:05:17,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:17,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100715880] [2024-06-21 22:05:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:17,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:20,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100715880] [2024-06-21 22:05:20,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100715880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:20,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:20,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:05:20,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346986453] [2024-06-21 22:05:20,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:20,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:05:20,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:20,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:05:20,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:05:20,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:05:20,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:20,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:20,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:05:20,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:22,241 INFO L124 PetriNetUnfolderBase]: 7229/10138 cut-off events. [2024-06-21 22:05:22,242 INFO L125 PetriNetUnfolderBase]: For 28009/28009 co-relation queries the response was YES. [2024-06-21 22:05:22,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35550 conditions, 10138 events. 7229/10138 cut-off events. For 28009/28009 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 53247 event pairs, 3192 based on Foata normal form. 3/10134 useless extension candidates. Maximal degree in co-relation 35526. Up to 9799 conditions per place. [2024-06-21 22:05:22,292 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 73 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-21 22:05:22,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 708 flow [2024-06-21 22:05:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:05:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:05:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 22:05:22,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-21 22:05:22,294 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 428 flow. Second operand 5 states and 122 transitions. [2024-06-21 22:05:22,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 708 flow [2024-06-21 22:05:22,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 669 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:22,317 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 492 flow [2024-06-21 22:05:22,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-21 22:05:22,318 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 22:05:22,318 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 492 flow [2024-06-21 22:05:22,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:22,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:22,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:22,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 22:05:22,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:22,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1646605273, now seen corresponding path program 1 times [2024-06-21 22:05:22,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:22,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399764021] [2024-06-21 22:05:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:25,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:25,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399764021] [2024-06-21 22:05:25,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399764021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:25,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:25,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:25,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267048982] [2024-06-21 22:05:25,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:25,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:25,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:25,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:05:25,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:25,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:25,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:05:25,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:27,389 INFO L124 PetriNetUnfolderBase]: 7256/10184 cut-off events. [2024-06-21 22:05:27,390 INFO L125 PetriNetUnfolderBase]: For 36566/36566 co-relation queries the response was YES. [2024-06-21 22:05:27,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38262 conditions, 10184 events. 7256/10184 cut-off events. For 36566/36566 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 53497 event pairs, 3082 based on Foata normal form. 3/10180 useless extension candidates. Maximal degree in co-relation 38236. Up to 9750 conditions per place. [2024-06-21 22:05:27,470 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 75 selfloop transitions, 32 changer transitions 0/113 dead transitions. [2024-06-21 22:05:27,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 832 flow [2024-06-21 22:05:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 22:05:27,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 22:05:27,472 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 492 flow. Second operand 6 states and 147 transitions. [2024-06-21 22:05:27,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 832 flow [2024-06-21 22:05:27,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 789 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:27,499 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 586 flow [2024-06-21 22:05:27,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=586, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 22:05:27,499 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 22:05:27,499 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 586 flow [2024-06-21 22:05:27,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:27,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:27,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:27,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 22:05:27,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:27,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1400377473, now seen corresponding path program 2 times [2024-06-21 22:05:27,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:27,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184321847] [2024-06-21 22:05:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:27,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:30,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:30,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184321847] [2024-06-21 22:05:30,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184321847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:30,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:30,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176972393] [2024-06-21 22:05:30,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:30,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:30,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:05:30,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 586 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:30,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:30,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:05:30,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:32,484 INFO L124 PetriNetUnfolderBase]: 7247/10212 cut-off events. [2024-06-21 22:05:32,485 INFO L125 PetriNetUnfolderBase]: For 47891/47891 co-relation queries the response was YES. [2024-06-21 22:05:32,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40892 conditions, 10212 events. 7247/10212 cut-off events. For 47891/47891 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 54638 event pairs, 3082 based on Foata normal form. 3/10208 useless extension candidates. Maximal degree in co-relation 40865. Up to 9719 conditions per place. [2024-06-21 22:05:32,535 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 84 selfloop transitions, 36 changer transitions 0/126 dead transitions. [2024-06-21 22:05:32,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 126 transitions, 982 flow [2024-06-21 22:05:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 22:05:32,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-21 22:05:32,538 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 586 flow. Second operand 7 states and 170 transitions. [2024-06-21 22:05:32,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 126 transitions, 982 flow [2024-06-21 22:05:32,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 126 transitions, 897 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:32,597 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 644 flow [2024-06-21 22:05:32,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=644, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-21 22:05:32,599 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 22:05:32,599 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 644 flow [2024-06-21 22:05:32,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:32,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:32,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:32,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 22:05:32,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:32,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:32,601 INFO L85 PathProgramCache]: Analyzing trace with hash -895431311, now seen corresponding path program 1 times [2024-06-21 22:05:32,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:32,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626932274] [2024-06-21 22:05:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:32,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:34,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:34,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626932274] [2024-06-21 22:05:34,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626932274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:34,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:34,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:05:34,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655002081] [2024-06-21 22:05:34,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:34,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:05:34,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:05:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:05:34,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:05:34,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 644 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:34,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:34,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:05:34,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:36,282 INFO L124 PetriNetUnfolderBase]: 5737/8106 cut-off events. [2024-06-21 22:05:36,285 INFO L125 PetriNetUnfolderBase]: For 43261/43261 co-relation queries the response was YES. [2024-06-21 22:05:36,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34143 conditions, 8106 events. 5737/8106 cut-off events. For 43261/43261 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43380 event pairs, 2612 based on Foata normal form. 8/8108 useless extension candidates. Maximal degree in co-relation 34115. Up to 7849 conditions per place. [2024-06-21 22:05:36,328 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 87 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2024-06-21 22:05:36,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 936 flow [2024-06-21 22:05:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:05:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:05:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 22:05:36,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 22:05:36,330 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 644 flow. Second operand 5 states and 120 transitions. [2024-06-21 22:05:36,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 936 flow [2024-06-21 22:05:36,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 829 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 22:05:36,350 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 619 flow [2024-06-21 22:05:36,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=619, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-21 22:05:36,351 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 22:05:36,351 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 619 flow [2024-06-21 22:05:36,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:36,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:36,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 22:05:36,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:36,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash -270200398, now seen corresponding path program 1 times [2024-06-21 22:05:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:36,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164669053] [2024-06-21 22:05:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:36,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164669053] [2024-06-21 22:05:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164669053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:38,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:38,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:38,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405362034] [2024-06-21 22:05:38,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:38,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:38,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:38,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:05:38,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 619 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:38,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:38,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:05:38,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:40,827 INFO L124 PetriNetUnfolderBase]: 7249/10184 cut-off events. [2024-06-21 22:05:40,827 INFO L125 PetriNetUnfolderBase]: For 60566/60566 co-relation queries the response was YES. [2024-06-21 22:05:40,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43806 conditions, 10184 events. 7249/10184 cut-off events. For 60566/60566 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 53662 event pairs, 2299 based on Foata normal form. 6/10183 useless extension candidates. Maximal degree in co-relation 43777. Up to 9818 conditions per place. [2024-06-21 22:05:40,898 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 103 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-21 22:05:40,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 124 transitions, 981 flow [2024-06-21 22:05:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 22:05:40,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 22:05:40,900 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 619 flow. Second operand 6 states and 143 transitions. [2024-06-21 22:05:40,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 124 transitions, 981 flow [2024-06-21 22:05:40,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 931 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:40,957 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 659 flow [2024-06-21 22:05:40,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-21 22:05:40,958 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-21 22:05:40,959 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 659 flow [2024-06-21 22:05:40,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:40,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:40,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:40,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 22:05:40,959 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:40,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash -31565174, now seen corresponding path program 2 times [2024-06-21 22:05:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:40,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069819972] [2024-06-21 22:05:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:43,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:43,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069819972] [2024-06-21 22:05:43,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069819972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:43,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:43,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:05:43,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476626695] [2024-06-21 22:05:43,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:43,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:05:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:05:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:05:43,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:05:43,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 659 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:43,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:43,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:05:43,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:45,978 INFO L124 PetriNetUnfolderBase]: 7234/10167 cut-off events. [2024-06-21 22:05:45,978 INFO L125 PetriNetUnfolderBase]: For 70855/70855 co-relation queries the response was YES. [2024-06-21 22:05:46,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45373 conditions, 10167 events. 7234/10167 cut-off events. For 70855/70855 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 53666 event pairs, 2805 based on Foata normal form. 6/10166 useless extension candidates. Maximal degree in co-relation 45343. Up to 9737 conditions per place. [2024-06-21 22:05:46,039 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 98 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-21 22:05:46,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 1059 flow [2024-06-21 22:05:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:05:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:05:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 22:05:46,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2024-06-21 22:05:46,041 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 659 flow. Second operand 6 states and 145 transitions. [2024-06-21 22:05:46,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 1059 flow [2024-06-21 22:05:46,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 129 transitions, 995 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:46,088 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 740 flow [2024-06-21 22:05:46,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=740, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-21 22:05:46,089 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-21 22:05:46,089 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 740 flow [2024-06-21 22:05:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:46,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:46,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 22:05:46,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:46,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash -31560214, now seen corresponding path program 1 times [2024-06-21 22:05:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:46,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646897493] [2024-06-21 22:05:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:46,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:49,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:49,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646897493] [2024-06-21 22:05:49,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646897493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:49,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:49,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781359341] [2024-06-21 22:05:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:49,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:49,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:05:49,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 740 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:49,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:49,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:05:49,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:52,138 INFO L124 PetriNetUnfolderBase]: 7531/10623 cut-off events. [2024-06-21 22:05:52,138 INFO L125 PetriNetUnfolderBase]: For 89159/89165 co-relation queries the response was YES. [2024-06-21 22:05:52,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49637 conditions, 10623 events. 7531/10623 cut-off events. For 89159/89165 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 56466 event pairs, 2799 based on Foata normal form. 30/10651 useless extension candidates. Maximal degree in co-relation 49606. Up to 10057 conditions per place. [2024-06-21 22:05:52,196 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 156 selfloop transitions, 38 changer transitions 0/200 dead transitions. [2024-06-21 22:05:52,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 200 transitions, 1607 flow [2024-06-21 22:05:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:05:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:05:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-21 22:05:52,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 22:05:52,218 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 740 flow. Second operand 10 states and 245 transitions. [2024-06-21 22:05:52,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 200 transitions, 1607 flow [2024-06-21 22:05:52,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 200 transitions, 1477 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 22:05:52,296 INFO L231 Difference]: Finished difference. Result has 95 places, 124 transitions, 1036 flow [2024-06-21 22:05:52,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1036, PETRI_PLACES=95, PETRI_TRANSITIONS=124} [2024-06-21 22:05:52,297 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2024-06-21 22:05:52,297 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 124 transitions, 1036 flow [2024-06-21 22:05:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:52,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:52,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:52,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:05:52,297 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:52,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash -598397358, now seen corresponding path program 2 times [2024-06-21 22:05:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:52,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564604187] [2024-06-21 22:05:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:52,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:05:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:05:55,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:05:55,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564604187] [2024-06-21 22:05:55,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564604187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:05:55,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:05:55,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:05:55,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056764879] [2024-06-21 22:05:55,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:05:55,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:05:55,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:05:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:05:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:05:55,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:05:55,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 124 transitions, 1036 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:55,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:05:55,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:05:55,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:05:58,271 INFO L124 PetriNetUnfolderBase]: 7687/10869 cut-off events. [2024-06-21 22:05:58,271 INFO L125 PetriNetUnfolderBase]: For 106301/106307 co-relation queries the response was YES. [2024-06-21 22:05:58,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53184 conditions, 10869 events. 7687/10869 cut-off events. For 106301/106307 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 57868 event pairs, 2539 based on Foata normal form. 25/10881 useless extension candidates. Maximal degree in co-relation 53147. Up to 9851 conditions per place. [2024-06-21 22:05:58,336 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 115 selfloop transitions, 54 changer transitions 0/175 dead transitions. [2024-06-21 22:05:58,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 175 transitions, 1604 flow [2024-06-21 22:05:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:05:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:05:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 22:05:58,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-21 22:05:58,338 INFO L175 Difference]: Start difference. First operand has 95 places, 124 transitions, 1036 flow. Second operand 7 states and 174 transitions. [2024-06-21 22:05:58,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 175 transitions, 1604 flow [2024-06-21 22:05:58,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 1504 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 22:05:58,433 INFO L231 Difference]: Finished difference. Result has 99 places, 128 transitions, 1146 flow [2024-06-21 22:05:58,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=99, PETRI_TRANSITIONS=128} [2024-06-21 22:05:58,433 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 22:05:58,434 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 128 transitions, 1146 flow [2024-06-21 22:05:58,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:05:58,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:05:58,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:05:58,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:05:58,434 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:05:58,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:05:58,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1038518086, now seen corresponding path program 3 times [2024-06-21 22:05:58,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:05:58,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055032016] [2024-06-21 22:05:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:05:58,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:05:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055032016] [2024-06-21 22:06:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055032016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:01,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:01,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:01,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375784130] [2024-06-21 22:06:01,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:01,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:01,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:06:01,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 128 transitions, 1146 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:01,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:01,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:06:01,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:04,067 INFO L124 PetriNetUnfolderBase]: 8062/11442 cut-off events. [2024-06-21 22:06:04,067 INFO L125 PetriNetUnfolderBase]: For 126556/126562 co-relation queries the response was YES. [2024-06-21 22:06:04,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58233 conditions, 11442 events. 8062/11442 cut-off events. For 126556/126562 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 61688 event pairs, 2613 based on Foata normal form. 19/11448 useless extension candidates. Maximal degree in co-relation 58195. Up to 9785 conditions per place. [2024-06-21 22:06:04,130 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 120 selfloop transitions, 70 changer transitions 0/196 dead transitions. [2024-06-21 22:06:04,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 196 transitions, 1944 flow [2024-06-21 22:06:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:06:04,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:06:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 22:06:04,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831730769230769 [2024-06-21 22:06:04,132 INFO L175 Difference]: Start difference. First operand has 99 places, 128 transitions, 1146 flow. Second operand 8 states and 201 transitions. [2024-06-21 22:06:04,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 196 transitions, 1944 flow [2024-06-21 22:06:04,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 196 transitions, 1800 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:04,238 INFO L231 Difference]: Finished difference. Result has 103 places, 134 transitions, 1323 flow [2024-06-21 22:06:04,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1016, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1323, PETRI_PLACES=103, PETRI_TRANSITIONS=134} [2024-06-21 22:06:04,239 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-21 22:06:04,239 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 134 transitions, 1323 flow [2024-06-21 22:06:04,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:04,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:04,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:04,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:06:04,240 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:06:04,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1038524596, now seen corresponding path program 4 times [2024-06-21 22:06:04,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:04,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712541624] [2024-06-21 22:06:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:04,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:07,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:07,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712541624] [2024-06-21 22:06:07,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712541624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:07,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:07,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:07,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580816699] [2024-06-21 22:06:07,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:07,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:07,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:07,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:06:07,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 134 transitions, 1323 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:07,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:07,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:06:07,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:10,652 INFO L124 PetriNetUnfolderBase]: 8008/11375 cut-off events. [2024-06-21 22:06:10,652 INFO L125 PetriNetUnfolderBase]: For 125547/125571 co-relation queries the response was YES. [2024-06-21 22:06:10,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57794 conditions, 11375 events. 8008/11375 cut-off events. For 125547/125571 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 61724 event pairs, 2866 based on Foata normal form. 42/11411 useless extension candidates. Maximal degree in co-relation 57754. Up to 10686 conditions per place. [2024-06-21 22:06:10,726 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 158 selfloop transitions, 38 changer transitions 0/202 dead transitions. [2024-06-21 22:06:10,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 202 transitions, 1939 flow [2024-06-21 22:06:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:06:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:06:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 22:06:10,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636752136752137 [2024-06-21 22:06:10,728 INFO L175 Difference]: Start difference. First operand has 103 places, 134 transitions, 1323 flow. Second operand 9 states and 217 transitions. [2024-06-21 22:06:10,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 202 transitions, 1939 flow [2024-06-21 22:06:10,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 202 transitions, 1831 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 22:06:10,882 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1311 flow [2024-06-21 22:06:10,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1311, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-21 22:06:10,883 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-21 22:06:10,884 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1311 flow [2024-06-21 22:06:10,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:10,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:10,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:10,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:06:10,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:06:10,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:10,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2017772828, now seen corresponding path program 1 times [2024-06-21 22:06:10,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:10,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087577393] [2024-06-21 22:06:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:10,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:13,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:13,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087577393] [2024-06-21 22:06:13,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087577393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:13,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:13,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:13,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658323002] [2024-06-21 22:06:13,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:13,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:13,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:13,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:06:13,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1311 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:13,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:13,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:06:13,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:16,340 INFO L124 PetriNetUnfolderBase]: 8120/11530 cut-off events. [2024-06-21 22:06:16,340 INFO L125 PetriNetUnfolderBase]: For 136055/136061 co-relation queries the response was YES. [2024-06-21 22:06:16,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59335 conditions, 11530 events. 8120/11530 cut-off events. For 136055/136061 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 62500 event pairs, 2135 based on Foata normal form. 19/11524 useless extension candidates. Maximal degree in co-relation 59293. Up to 10920 conditions per place. [2024-06-21 22:06:16,419 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 145 selfloop transitions, 31 changer transitions 0/182 dead transitions. [2024-06-21 22:06:16,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 182 transitions, 1849 flow [2024-06-21 22:06:16,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 22:06:16,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 22:06:16,422 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1311 flow. Second operand 7 states and 167 transitions. [2024-06-21 22:06:16,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 182 transitions, 1849 flow [2024-06-21 22:06:16,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 182 transitions, 1759 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 22:06:16,569 INFO L231 Difference]: Finished difference. Result has 107 places, 137 transitions, 1350 flow [2024-06-21 22:06:16,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1350, PETRI_PLACES=107, PETRI_TRANSITIONS=137} [2024-06-21 22:06:16,569 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 22:06:16,570 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 137 transitions, 1350 flow [2024-06-21 22:06:16,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:16,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:16,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:16,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:06:16,571 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:06:16,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:16,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1763610248, now seen corresponding path program 2 times [2024-06-21 22:06:16,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:16,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130174556] [2024-06-21 22:06:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:16,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:19,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:19,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130174556] [2024-06-21 22:06:19,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130174556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:19,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:19,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:06:19,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504965339] [2024-06-21 22:06:19,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:19,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:06:19,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:06:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:06:19,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:06:19,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 137 transitions, 1350 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:19,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:19,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:06:19,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:22,471 INFO L124 PetriNetUnfolderBase]: 8081/11505 cut-off events. [2024-06-21 22:06:22,472 INFO L125 PetriNetUnfolderBase]: For 146402/146408 co-relation queries the response was YES. [2024-06-21 22:06:22,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59925 conditions, 11505 events. 8081/11505 cut-off events. For 146402/146408 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 62951 event pairs, 2754 based on Foata normal form. 19/11511 useless extension candidates. Maximal degree in co-relation 59883. Up to 10634 conditions per place. [2024-06-21 22:06:22,548 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 129 selfloop transitions, 48 changer transitions 0/183 dead transitions. [2024-06-21 22:06:22,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 183 transitions, 1866 flow [2024-06-21 22:06:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 22:06:22,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 22:06:22,550 INFO L175 Difference]: Start difference. First operand has 107 places, 137 transitions, 1350 flow. Second operand 7 states and 168 transitions. [2024-06-21 22:06:22,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 183 transitions, 1866 flow [2024-06-21 22:06:22,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1769 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:22,721 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1391 flow [2024-06-21 22:06:22,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1391, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-21 22:06:22,722 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-21 22:06:22,722 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1391 flow [2024-06-21 22:06:22,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:22,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:22,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:22,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:06:22,722 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:06:22,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1520706992, now seen corresponding path program 1 times [2024-06-21 22:06:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723552448] [2024-06-21 22:06:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:25,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:25,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723552448] [2024-06-21 22:06:25,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723552448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:25,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:25,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:06:25,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301964843] [2024-06-21 22:06:25,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:25,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:06:25,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:25,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:06:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:06:25,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:06:25,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1391 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:25,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:25,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:06:25,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:27,476 INFO L124 PetriNetUnfolderBase]: 7786/11257 cut-off events. [2024-06-21 22:06:27,476 INFO L125 PetriNetUnfolderBase]: For 165083/165088 co-relation queries the response was YES. [2024-06-21 22:06:27,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61085 conditions, 11257 events. 7786/11257 cut-off events. For 165083/165088 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 62688 event pairs, 2700 based on Foata normal form. 13/11243 useless extension candidates. Maximal degree in co-relation 61042. Up to 10553 conditions per place. [2024-06-21 22:06:27,565 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 131 selfloop transitions, 45 changer transitions 0/184 dead transitions. [2024-06-21 22:06:27,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 184 transitions, 2051 flow [2024-06-21 22:06:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:06:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:06:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 22:06:27,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2024-06-21 22:06:27,568 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1391 flow. Second operand 6 states and 149 transitions. [2024-06-21 22:06:27,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 184 transitions, 2051 flow [2024-06-21 22:06:27,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 1883 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 22:06:27,776 INFO L231 Difference]: Finished difference. Result has 109 places, 151 transitions, 1506 flow [2024-06-21 22:06:27,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1506, PETRI_PLACES=109, PETRI_TRANSITIONS=151} [2024-06-21 22:06:27,777 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-21 22:06:27,777 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 151 transitions, 1506 flow [2024-06-21 22:06:27,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:27,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:27,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:27,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:06:27,777 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:06:27,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:27,778 INFO L85 PathProgramCache]: Analyzing trace with hash -999888392, now seen corresponding path program 2 times [2024-06-21 22:06:27,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:27,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429982683] [2024-06-21 22:06:27,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:27,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:30,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:30,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429982683] [2024-06-21 22:06:30,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429982683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:30,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:30,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:06:30,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131627817] [2024-06-21 22:06:30,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:30,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:06:30,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:06:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:06:30,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:06:30,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 151 transitions, 1506 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:30,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:30,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:06:30,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:32,404 INFO L124 PetriNetUnfolderBase]: 7753/11224 cut-off events. [2024-06-21 22:06:32,404 INFO L125 PetriNetUnfolderBase]: For 178578/178583 co-relation queries the response was YES. [2024-06-21 22:06:32,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63354 conditions, 11224 events. 7753/11224 cut-off events. For 178578/178583 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 62443 event pairs, 2715 based on Foata normal form. 13/11216 useless extension candidates. Maximal degree in co-relation 63310. Up to 10718 conditions per place. [2024-06-21 22:06:32,497 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 138 selfloop transitions, 31 changer transitions 0/177 dead transitions. [2024-06-21 22:06:32,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 177 transitions, 1934 flow [2024-06-21 22:06:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:06:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:06:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 22:06:32,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 22:06:32,500 INFO L175 Difference]: Start difference. First operand has 109 places, 151 transitions, 1506 flow. Second operand 6 states and 140 transitions. [2024-06-21 22:06:32,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 177 transitions, 1934 flow [2024-06-21 22:06:32,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 1838 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-21 22:06:32,764 INFO L231 Difference]: Finished difference. Result has 114 places, 151 transitions, 1481 flow [2024-06-21 22:06:32,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1481, PETRI_PLACES=114, PETRI_TRANSITIONS=151} [2024-06-21 22:06:32,764 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 59 predicate places. [2024-06-21 22:06:32,764 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 151 transitions, 1481 flow [2024-06-21 22:06:32,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:32,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:32,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:32,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:06:32,765 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:06:32,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash 102636020, now seen corresponding path program 1 times [2024-06-21 22:06:32,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:32,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115780317] [2024-06-21 22:06:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:32,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:36,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:36,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115780317] [2024-06-21 22:06:36,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115780317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:36,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:36,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:06:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887865319] [2024-06-21 22:06:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:36,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:06:36,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:06:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:06:36,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:06:36,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 151 transitions, 1481 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:36,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:36,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:06:36,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:39,151 INFO L124 PetriNetUnfolderBase]: 7893/11437 cut-off events. [2024-06-21 22:06:39,151 INFO L125 PetriNetUnfolderBase]: For 192233/192250 co-relation queries the response was YES. [2024-06-21 22:06:39,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64656 conditions, 11437 events. 7893/11437 cut-off events. For 192233/192250 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 64054 event pairs, 2685 based on Foata normal form. 24/11448 useless extension candidates. Maximal degree in co-relation 64609. Up to 10846 conditions per place. [2024-06-21 22:06:39,233 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 154 selfloop transitions, 38 changer transitions 0/200 dead transitions. [2024-06-21 22:06:39,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 200 transitions, 2085 flow [2024-06-21 22:06:39,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 22:06:39,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 22:06:39,238 INFO L175 Difference]: Start difference. First operand has 114 places, 151 transitions, 1481 flow. Second operand 7 states and 169 transitions. [2024-06-21 22:06:39,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 200 transitions, 2085 flow [2024-06-21 22:06:39,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 200 transitions, 1976 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:39,448 INFO L231 Difference]: Finished difference. Result has 116 places, 160 transitions, 1578 flow [2024-06-21 22:06:39,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1578, PETRI_PLACES=116, PETRI_TRANSITIONS=160} [2024-06-21 22:06:39,448 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-21 22:06:39,448 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 160 transitions, 1578 flow [2024-06-21 22:06:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:39,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:39,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:39,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:06:39,449 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:06:39,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash -425990200, now seen corresponding path program 2 times [2024-06-21 22:06:39,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:39,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390848222] [2024-06-21 22:06:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:39,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:42,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:42,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390848222] [2024-06-21 22:06:42,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390848222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:42,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:42,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:06:42,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016926889] [2024-06-21 22:06:42,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:42,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:06:42,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:06:42,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:06:42,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:06:42,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 160 transitions, 1578 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:43,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:43,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:06:43,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:45,412 INFO L124 PetriNetUnfolderBase]: 7995/11575 cut-off events. [2024-06-21 22:06:45,413 INFO L125 PetriNetUnfolderBase]: For 213013/213030 co-relation queries the response was YES. [2024-06-21 22:06:45,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68738 conditions, 11575 events. 7995/11575 cut-off events. For 213013/213030 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 64883 event pairs, 2701 based on Foata normal form. 24/11586 useless extension candidates. Maximal degree in co-relation 68691. Up to 11023 conditions per place. [2024-06-21 22:06:45,492 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 164 selfloop transitions, 30 changer transitions 0/202 dead transitions. [2024-06-21 22:06:45,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 202 transitions, 2168 flow [2024-06-21 22:06:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:45,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:45,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 22:06:45,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532967032967033 [2024-06-21 22:06:45,495 INFO L175 Difference]: Start difference. First operand has 116 places, 160 transitions, 1578 flow. Second operand 7 states and 165 transitions. [2024-06-21 22:06:45,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 202 transitions, 2168 flow [2024-06-21 22:06:45,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 202 transitions, 2050 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:45,736 INFO L231 Difference]: Finished difference. Result has 118 places, 165 transitions, 1624 flow [2024-06-21 22:06:45,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1624, PETRI_PLACES=118, PETRI_TRANSITIONS=165} [2024-06-21 22:06:45,737 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-21 22:06:45,737 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 165 transitions, 1624 flow [2024-06-21 22:06:45,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:45,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:45,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:45,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:06:45,738 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)] === [2024-06-21 22:06:45,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash 250335830, now seen corresponding path program 3 times [2024-06-21 22:06:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047456609] [2024-06-21 22:06:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:45,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:48,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:48,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047456609] [2024-06-21 22:06:48,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047456609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:48,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:48,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:06:48,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548089029] [2024-06-21 22:06:48,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:48,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:06:48,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:06:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:06:48,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:06:48,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 165 transitions, 1624 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:48,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:48,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:06:48,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:51,060 INFO L124 PetriNetUnfolderBase]: 8053/11640 cut-off events. [2024-06-21 22:06:51,060 INFO L125 PetriNetUnfolderBase]: For 234993/234998 co-relation queries the response was YES. [2024-06-21 22:06:51,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71906 conditions, 11640 events. 8053/11640 cut-off events. For 234993/234998 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 65015 event pairs, 2719 based on Foata normal form. 13/11632 useless extension candidates. Maximal degree in co-relation 71858. Up to 11038 conditions per place. [2024-06-21 22:06:51,147 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 158 selfloop transitions, 36 changer transitions 0/202 dead transitions. [2024-06-21 22:06:51,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 202 transitions, 2222 flow [2024-06-21 22:06:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-21 22:06:51,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44505494505494503 [2024-06-21 22:06:51,149 INFO L175 Difference]: Start difference. First operand has 118 places, 165 transitions, 1624 flow. Second operand 7 states and 162 transitions. [2024-06-21 22:06:51,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 202 transitions, 2222 flow [2024-06-21 22:06:51,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 202 transitions, 2101 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 22:06:51,450 INFO L231 Difference]: Finished difference. Result has 121 places, 170 transitions, 1689 flow [2024-06-21 22:06:51,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1689, PETRI_PLACES=121, PETRI_TRANSITIONS=170} [2024-06-21 22:06:51,450 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-21 22:06:51,450 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 170 transitions, 1689 flow [2024-06-21 22:06:51,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:51,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:51,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:51,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:06:51,451 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)] === [2024-06-21 22:06:51,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:51,451 INFO L85 PathProgramCache]: Analyzing trace with hash 250551311, now seen corresponding path program 1 times [2024-06-21 22:06:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:51,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946378650] [2024-06-21 22:06:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:51,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:06:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:06:54,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:06:54,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946378650] [2024-06-21 22:06:54,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946378650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:06:54,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:06:54,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:06:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528907373] [2024-06-21 22:06:54,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:06:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:06:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:06:54,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:06:54,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:06:54,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:06:54,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 170 transitions, 1689 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:54,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:06:54,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:06:54,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:06:58,064 INFO L124 PetriNetUnfolderBase]: 9679/13664 cut-off events. [2024-06-21 22:06:58,065 INFO L125 PetriNetUnfolderBase]: For 309791/309796 co-relation queries the response was YES. [2024-06-21 22:06:58,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86364 conditions, 13664 events. 9679/13664 cut-off events. For 309791/309796 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 73362 event pairs, 3327 based on Foata normal form. 29/13672 useless extension candidates. Maximal degree in co-relation 86315. Up to 13140 conditions per place. [2024-06-21 22:06:58,182 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 169 selfloop transitions, 36 changer transitions 0/212 dead transitions. [2024-06-21 22:06:58,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 212 transitions, 2347 flow [2024-06-21 22:06:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:06:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:06:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-21 22:06:58,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-21 22:06:58,184 INFO L175 Difference]: Start difference. First operand has 121 places, 170 transitions, 1689 flow. Second operand 7 states and 158 transitions. [2024-06-21 22:06:58,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 212 transitions, 2347 flow [2024-06-21 22:06:58,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 212 transitions, 2191 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 22:06:58,714 INFO L231 Difference]: Finished difference. Result has 124 places, 176 transitions, 1708 flow [2024-06-21 22:06:58,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1708, PETRI_PLACES=124, PETRI_TRANSITIONS=176} [2024-06-21 22:06:58,714 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 69 predicate places. [2024-06-21 22:06:58,714 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 176 transitions, 1708 flow [2024-06-21 22:06:58,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:06:58,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:06:58,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:06:58,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:06:58,715 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)] === [2024-06-21 22:06:58,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:06:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash -323648515, now seen corresponding path program 1 times [2024-06-21 22:06:58,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:06:58,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679398174] [2024-06-21 22:06:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:06:58,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:06:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:02,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:02,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679398174] [2024-06-21 22:07:02,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679398174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:02,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:02,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:02,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42001833] [2024-06-21 22:07:02,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:02,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:02,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:02,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:03,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:07:03,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 176 transitions, 1708 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:03,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:03,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:07:03,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:06,586 INFO L124 PetriNetUnfolderBase]: 11089/16072 cut-off events. [2024-06-21 22:07:06,586 INFO L125 PetriNetUnfolderBase]: For 428322/428327 co-relation queries the response was YES. [2024-06-21 22:07:06,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105977 conditions, 16072 events. 11089/16072 cut-off events. For 428322/428327 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 95124 event pairs, 3002 based on Foata normal form. 113/16127 useless extension candidates. Maximal degree in co-relation 105926. Up to 11175 conditions per place. [2024-06-21 22:07:06,702 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 152 selfloop transitions, 86 changer transitions 0/247 dead transitions. [2024-06-21 22:07:06,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 247 transitions, 2702 flow [2024-06-21 22:07:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 22:07:06,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072115384615384 [2024-06-21 22:07:06,704 INFO L175 Difference]: Start difference. First operand has 124 places, 176 transitions, 1708 flow. Second operand 8 states and 211 transitions. [2024-06-21 22:07:06,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 247 transitions, 2702 flow [2024-06-21 22:07:07,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 247 transitions, 2617 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:07,082 INFO L231 Difference]: Finished difference. Result has 129 places, 181 transitions, 1980 flow [2024-06-21 22:07:07,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1623, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1980, PETRI_PLACES=129, PETRI_TRANSITIONS=181} [2024-06-21 22:07:07,083 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-21 22:07:07,083 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 181 transitions, 1980 flow [2024-06-21 22:07:07,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:07,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:07,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:07,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:07:07,085 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)] === [2024-06-21 22:07:07,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash -323588065, now seen corresponding path program 2 times [2024-06-21 22:07:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:07,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541718647] [2024-06-21 22:07:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:07,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:11,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541718647] [2024-06-21 22:07:11,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541718647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:11,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:11,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738698879] [2024-06-21 22:07:11,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:11,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:07:11,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 181 transitions, 1980 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:11,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:11,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:07:11,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:15,409 INFO L124 PetriNetUnfolderBase]: 11674/16924 cut-off events. [2024-06-21 22:07:15,409 INFO L125 PetriNetUnfolderBase]: For 488836/488853 co-relation queries the response was YES. [2024-06-21 22:07:15,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115496 conditions, 16924 events. 11674/16924 cut-off events. For 488836/488853 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 101371 event pairs, 3866 based on Foata normal form. 148/17053 useless extension candidates. Maximal degree in co-relation 115443. Up to 15165 conditions per place. [2024-06-21 22:07:15,534 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 186 selfloop transitions, 41 changer transitions 0/236 dead transitions. [2024-06-21 22:07:15,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 236 transitions, 2710 flow [2024-06-21 22:07:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 22:07:15,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 22:07:15,536 INFO L175 Difference]: Start difference. First operand has 129 places, 181 transitions, 1980 flow. Second operand 8 states and 195 transitions. [2024-06-21 22:07:15,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 236 transitions, 2710 flow [2024-06-21 22:07:16,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 236 transitions, 2598 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:16,217 INFO L231 Difference]: Finished difference. Result has 133 places, 184 transitions, 2046 flow [2024-06-21 22:07:16,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1868, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2046, PETRI_PLACES=133, PETRI_TRANSITIONS=184} [2024-06-21 22:07:16,218 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-21 22:07:16,218 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 184 transitions, 2046 flow [2024-06-21 22:07:16,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:16,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:16,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:16,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:07:16,219 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:07:16,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1110451409, now seen corresponding path program 3 times [2024-06-21 22:07:16,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:16,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994651918] [2024-06-21 22:07:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:21,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994651918] [2024-06-21 22:07:21,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994651918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:21,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:21,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:21,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517982144] [2024-06-21 22:07:21,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:21,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:21,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:21,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:21,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:21,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:07:21,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 184 transitions, 2046 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:21,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:21,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:07:21,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:25,330 INFO L124 PetriNetUnfolderBase]: 12771/18530 cut-off events. [2024-06-21 22:07:25,330 INFO L125 PetriNetUnfolderBase]: For 559047/559052 co-relation queries the response was YES. [2024-06-21 22:07:25,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128535 conditions, 18530 events. 12771/18530 cut-off events. For 559047/559052 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 113268 event pairs, 3879 based on Foata normal form. 133/18623 useless extension candidates. Maximal degree in co-relation 128480. Up to 16309 conditions per place. [2024-06-21 22:07:25,495 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 166 selfloop transitions, 67 changer transitions 0/242 dead transitions. [2024-06-21 22:07:25,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 242 transitions, 2980 flow [2024-06-21 22:07:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:07:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:07:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 22:07:25,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-21 22:07:25,497 INFO L175 Difference]: Start difference. First operand has 133 places, 184 transitions, 2046 flow. Second operand 8 states and 197 transitions. [2024-06-21 22:07:25,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 242 transitions, 2980 flow [2024-06-21 22:07:26,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 242 transitions, 2834 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 22:07:26,450 INFO L231 Difference]: Finished difference. Result has 136 places, 193 transitions, 2333 flow [2024-06-21 22:07:26,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2333, PETRI_PLACES=136, PETRI_TRANSITIONS=193} [2024-06-21 22:07:26,450 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 81 predicate places. [2024-06-21 22:07:26,450 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 193 transitions, 2333 flow [2024-06-21 22:07:26,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:26,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:26,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:26,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:07:26,451 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:07:26,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash 826514865, now seen corresponding path program 1 times [2024-06-21 22:07:26,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:26,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188346161] [2024-06-21 22:07:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:26,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:29,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:29,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188346161] [2024-06-21 22:07:29,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188346161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:29,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:29,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092568391] [2024-06-21 22:07:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:29,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:29,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:07:29,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 193 transitions, 2333 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:29,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:29,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:07:29,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:34,096 INFO L124 PetriNetUnfolderBase]: 14233/20252 cut-off events. [2024-06-21 22:07:34,096 INFO L125 PetriNetUnfolderBase]: For 618760/618765 co-relation queries the response was YES. [2024-06-21 22:07:34,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144188 conditions, 20252 events. 14233/20252 cut-off events. For 618760/618765 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 119100 event pairs, 4777 based on Foata normal form. 7/20238 useless extension candidates. Maximal degree in co-relation 144131. Up to 19807 conditions per place. [2024-06-21 22:07:34,273 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 184 selfloop transitions, 42 changer transitions 0/233 dead transitions. [2024-06-21 22:07:34,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 233 transitions, 3080 flow [2024-06-21 22:07:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:07:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:07:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 22:07:34,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:07:34,275 INFO L175 Difference]: Start difference. First operand has 136 places, 193 transitions, 2333 flow. Second operand 7 states and 156 transitions. [2024-06-21 22:07:34,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 233 transitions, 3080 flow [2024-06-21 22:07:35,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 233 transitions, 2895 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-21 22:07:35,535 INFO L231 Difference]: Finished difference. Result has 139 places, 201 transitions, 2401 flow [2024-06-21 22:07:35,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2152, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2401, PETRI_PLACES=139, PETRI_TRANSITIONS=201} [2024-06-21 22:07:35,536 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-21 22:07:35,536 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 201 transitions, 2401 flow [2024-06-21 22:07:35,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:35,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:35,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:07:35,537 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:07:35,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash -829521105, now seen corresponding path program 4 times [2024-06-21 22:07:35,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:35,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895140222] [2024-06-21 22:07:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:38,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:38,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895140222] [2024-06-21 22:07:38,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895140222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:38,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:38,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:38,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892352618] [2024-06-21 22:07:38,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:38,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:38,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:38,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:38,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 22:07:38,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 201 transitions, 2401 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:38,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:38,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 22:07:38,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:43,469 INFO L124 PetriNetUnfolderBase]: 14222/20627 cut-off events. [2024-06-21 22:07:43,469 INFO L125 PetriNetUnfolderBase]: For 690254/690259 co-relation queries the response was YES. [2024-06-21 22:07:43,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147819 conditions, 20627 events. 14222/20627 cut-off events. For 690254/690259 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 128834 event pairs, 4436 based on Foata normal form. 223/20805 useless extension candidates. Maximal degree in co-relation 147760. Up to 17883 conditions per place. [2024-06-21 22:07:43,644 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 209 selfloop transitions, 62 changer transitions 0/280 dead transitions. [2024-06-21 22:07:43,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 280 transitions, 3721 flow [2024-06-21 22:07:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:07:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:07:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 22:07:43,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-21 22:07:43,646 INFO L175 Difference]: Start difference. First operand has 139 places, 201 transitions, 2401 flow. Second operand 9 states and 210 transitions. [2024-06-21 22:07:43,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 280 transitions, 3721 flow [2024-06-21 22:07:44,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 280 transitions, 3516 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 22:07:44,443 INFO L231 Difference]: Finished difference. Result has 146 places, 233 transitions, 3023 flow [2024-06-21 22:07:44,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3023, PETRI_PLACES=146, PETRI_TRANSITIONS=233} [2024-06-21 22:07:44,447 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-21 22:07:44,447 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 233 transitions, 3023 flow [2024-06-21 22:07:44,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:44,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:44,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:44,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:07:44,448 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 22:07:44,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1518473861, now seen corresponding path program 1 times [2024-06-21 22:07:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:44,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472309841] [2024-06-21 22:07:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:44,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:45,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:45,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472309841] [2024-06-21 22:07:45,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472309841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:45,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:45,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:07:45,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194704183] [2024-06-21 22:07:45,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:45,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:07:45,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:07:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:07:45,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-21 22:07:45,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 233 transitions, 3023 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:45,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:45,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-21 22:07:45,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:07:50,890 INFO L124 PetriNetUnfolderBase]: 16502/23172 cut-off events. [2024-06-21 22:07:50,890 INFO L125 PetriNetUnfolderBase]: For 741091/741093 co-relation queries the response was YES. [2024-06-21 22:07:50,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167670 conditions, 23172 events. 16502/23172 cut-off events. For 741091/741093 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 138575 event pairs, 5284 based on Foata normal form. 2/23172 useless extension candidates. Maximal degree in co-relation 167607. Up to 23009 conditions per place. [2024-06-21 22:07:51,077 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 237 selfloop transitions, 10 changer transitions 0/252 dead transitions. [2024-06-21 22:07:51,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 252 transitions, 3605 flow [2024-06-21 22:07:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:07:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:07:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-21 22:07:51,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:07:51,079 INFO L175 Difference]: Start difference. First operand has 146 places, 233 transitions, 3023 flow. Second operand 5 states and 104 transitions. [2024-06-21 22:07:51,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 252 transitions, 3605 flow [2024-06-21 22:07:53,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 252 transitions, 3300 flow, removed 134 selfloop flow, removed 3 redundant places. [2024-06-21 22:07:53,128 INFO L231 Difference]: Finished difference. Result has 148 places, 237 transitions, 2799 flow [2024-06-21 22:07:53,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2799, PETRI_PLACES=148, PETRI_TRANSITIONS=237} [2024-06-21 22:07:53,130 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-21 22:07:53,131 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 237 transitions, 2799 flow [2024-06-21 22:07:53,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:53,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:07:53,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:07:53,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:07:53,139 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)] === [2024-06-21 22:07:53,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:07:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1067641337, now seen corresponding path program 1 times [2024-06-21 22:07:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:07:53,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218987090] [2024-06-21 22:07:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:07:53,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:07:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:07:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:07:56,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:07:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218987090] [2024-06-21 22:07:56,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218987090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:07:56,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:07:56,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:07:56,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881050009] [2024-06-21 22:07:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:07:56,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:07:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:07:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:07:56,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:07:56,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 22:07:56,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 237 transitions, 2799 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:07:56,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:07:56,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 22:07:56,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand