./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix043.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix043.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix043.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix043.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:10:19,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:10:19,749 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:10:19,754 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:10:19,754 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:10:19,781 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:10:19,782 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:10:19,782 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:10:19,783 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:10:19,785 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:10:19,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:10:19,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:10:19,787 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:10:19,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:10:19,788 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:10:19,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:10:19,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:10:19,789 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:10:19,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:10:19,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:10:19,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:10:19,791 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:10:19,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:10:19,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:10:19,791 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:10:19,792 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:10:19,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:10:19,792 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:10:19,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:10:19,793 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:10:19,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:10:19,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:10:19,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:10:19,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:10:19,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:10:19,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:10:19,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:10:19,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:10:19,795 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:10:19,795 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:10:19,795 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:10:19,796 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:10:19,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:10:19,796 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:10:20,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:10:20,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:10:20,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:10:20,032 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:10:20,032 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:10:20,033 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix043.oepc.i [2024-06-21 21:10:20,979 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:10:21,168 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:10:21,169 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix043.oepc.i [2024-06-21 21:10:21,187 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/654413688/c963c7a0dc764018915861f84f1128f1/FLAGda1112607 [2024-06-21 21:10:21,549 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/654413688/c963c7a0dc764018915861f84f1128f1 [2024-06-21 21:10:21,551 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:10:21,551 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:10:21,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix043.oepc.yml/witness.yml [2024-06-21 21:10:21,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:10:21,749 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:10:21,749 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:10:21,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:10:21,753 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:10:21,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:10:21" (1/2) ... [2024-06-21 21:10:21,755 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c1c1611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:10:21, skipping insertion in model container [2024-06-21 21:10:21,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:10:21" (1/2) ... [2024-06-21 21:10:21,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@43c187a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:10:21, skipping insertion in model container [2024-06-21 21:10:21,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:10:21" (2/2) ... [2024-06-21 21:10:21,757 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c1c1611 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:21, skipping insertion in model container [2024-06-21 21:10:21,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:10:21" (2/2) ... [2024-06-21 21:10:21,769 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:10:21,875 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:10:21,876 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff0_thd4 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$r_buff1_thd4 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:10:21,876 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] (((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff0_thd4 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$r_buff1_thd4 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:10:21,877 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff0_thd4 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$r_buff1_thd4 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:10:21,877 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (((((((((((((((((((((((0 <= __unbuffered_cnt && b$flush_delayed == (_Bool)0) && b$r_buff0_thd0 == (_Bool)0) && b$r_buff0_thd2 == (_Bool)0) && b$r_buff0_thd3 == (_Bool)0) && b$r_buff0_thd4 == (_Bool)0) && b$r_buff1_thd0 == (_Bool)0) && b$r_buff1_thd2 == (_Bool)0) && b$r_buff1_thd3 == (_Bool)0) && b$r_buff1_thd4 == (_Bool)0) && b$read_delayed == (_Bool)0) && b$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (b$mem_tmp == 0 || b$mem_tmp == 1)) && (b$w_buff0 == 0 || b$w_buff0 == 1)) && (b$w_buff1 == 0 || b$w_buff1 == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:10:21,877 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:10:21,878 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-21 21:10:21,920 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:10:22,215 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:10:22,222 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:10:22,337 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:10:22,374 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:10:22,375 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22 WrapperNode [2024-06-21 21:10:22,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:10:22,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:10:22,376 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:10:22,376 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:10:22,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,404 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,438 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 140 [2024-06-21 21:10:22,439 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:10:22,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:10:22,440 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:10:22,440 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:10:22,454 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,457 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,480 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:10:22,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,490 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:10:22,513 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:10:22,513 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:10:22,513 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:10:22,513 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (1/1) ... [2024-06-21 21:10:22,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:10:22,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:10:22,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:10:22,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:10:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:10:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:10:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:10:22,581 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:10:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:10:22,582 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:10:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:10:22,582 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:10:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:10:22,582 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:10:22,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:10:22,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:10:22,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:10:22,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:10:22,585 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:10:22,719 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:10:22,721 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:10:23,113 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:10:23,113 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:10:23,271 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:10:23,271 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:10:23,271 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:10:23 BoogieIcfgContainer [2024-06-21 21:10:23,272 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:10:23,273 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:10:23,273 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:10:23,275 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:10:23,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:10:21" (1/4) ... [2024-06-21 21:10:23,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f129e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:10:23, skipping insertion in model container [2024-06-21 21:10:23,276 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:10:21" (2/4) ... [2024-06-21 21:10:23,276 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f129e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:10:23, skipping insertion in model container [2024-06-21 21:10:23,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:10:22" (3/4) ... [2024-06-21 21:10:23,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f129e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:10:23, skipping insertion in model container [2024-06-21 21:10:23,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:10:23" (4/4) ... [2024-06-21 21:10:23,278 INFO L112 eAbstractionObserver]: Analyzing ICFG mix043.oepc.i [2024-06-21 21:10:23,289 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:10:23,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:10:23,290 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:10:23,330 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:10:23,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 21:10:23,372 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 21:10:23,372 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:10:23,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:10:23,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 21:10:23,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 21:10:23,381 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:10:23,420 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;@1e0d6e13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:10:23,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:10:23,437 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:10:23,437 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:10:23,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:10:23,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:23,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:10:23,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:23,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash 407834173, now seen corresponding path program 1 times [2024-06-21 21:10:23,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:23,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205458129] [2024-06-21 21:10:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:23,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:24,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:24,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205458129] [2024-06-21 21:10:24,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205458129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:24,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:24,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:10:24,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905249322] [2024-06-21 21:10:24,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:24,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:10:24,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:10:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:10:24,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:10:24,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:24,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:24,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:10:24,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:26,074 INFO L124 PetriNetUnfolderBase]: 10942/15157 cut-off events. [2024-06-21 21:10:26,075 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-21 21:10:26,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30334 conditions, 15157 events. 10942/15157 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 82789 event pairs, 8442 based on Foata normal form. 1/14828 useless extension candidates. Maximal degree in co-relation 30321. Up to 14798 conditions per place. [2024-06-21 21:10:26,174 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 21:10:26,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-21 21:10:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:10:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:10:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-21 21:10:26,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163522012578616 [2024-06-21 21:10:26,184 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 98 transitions. [2024-06-21 21:10:26,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-21 21:10:26,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:10:26,188 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 21:10:26,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 21:10:26,192 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 21:10:26,193 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 21:10:26,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:26,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:26,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:26,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:10:26,194 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:26,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:26,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1086673948, now seen corresponding path program 1 times [2024-06-21 21:10:26,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:26,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162434032] [2024-06-21 21:10:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:26,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:26,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:26,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162434032] [2024-06-21 21:10:26,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162434032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:26,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:26,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:10:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729577812] [2024-06-21 21:10:26,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:27,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:10:27,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:10:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:10:27,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-21 21:10:27,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:27,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:27,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-21 21:10:27,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:28,487 INFO L124 PetriNetUnfolderBase]: 10932/15154 cut-off events. [2024-06-21 21:10:28,487 INFO L125 PetriNetUnfolderBase]: For 2814/2814 co-relation queries the response was YES. [2024-06-21 21:10:28,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34167 conditions, 15154 events. 10932/15154 cut-off events. For 2814/2814 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 82762 event pairs, 7512 based on Foata normal form. 4/15005 useless extension candidates. Maximal degree in co-relation 34155. Up to 14763 conditions per place. [2024-06-21 21:10:28,568 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 21:10:28,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-21 21:10:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:10:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:10:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-21 21:10:28,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-21 21:10:28,572 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-21 21:10:28,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-21 21:10:28,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:10:28,577 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 21:10:28,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 21:10:28,578 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 21:10:28,579 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 21:10:28,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:28,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:28,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:28,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:10:28,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:28,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 616670715, now seen corresponding path program 1 times [2024-06-21 21:10:28,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:28,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64365480] [2024-06-21 21:10:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:28,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:29,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64365480] [2024-06-21 21:10:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64365480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:29,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:10:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309891622] [2024-06-21 21:10:29,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:29,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:10:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:10:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:10:29,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:10:29,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:29,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:29,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:10:29,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:31,489 INFO L124 PetriNetUnfolderBase]: 13257/18301 cut-off events. [2024-06-21 21:10:31,490 INFO L125 PetriNetUnfolderBase]: For 9331/9331 co-relation queries the response was YES. [2024-06-21 21:10:31,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45520 conditions, 18301 events. 13257/18301 cut-off events. For 9331/9331 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100570 event pairs, 7685 based on Foata normal form. 4/18122 useless extension candidates. Maximal degree in co-relation 45506. Up to 17812 conditions per place. [2024-06-21 21:10:31,569 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 75 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-21 21:10:31,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 512 flow [2024-06-21 21:10:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:10:31,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:10:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-21 21:10:31,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-21 21:10:31,571 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 180 transitions. [2024-06-21 21:10:31,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 512 flow [2024-06-21 21:10:31,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 484 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 21:10:31,574 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-21 21:10:31,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-21 21:10:31,575 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 21:10:31,575 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-21 21:10:31,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:31,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:31,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:31,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:10:31,576 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:31,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:31,576 INFO L85 PathProgramCache]: Analyzing trace with hash 216202615, now seen corresponding path program 1 times [2024-06-21 21:10:31,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:31,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074470209] [2024-06-21 21:10:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:31,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:32,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:32,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074470209] [2024-06-21 21:10:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074470209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:32,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:10:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720798730] [2024-06-21 21:10:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:10:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:10:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:10:32,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:10:32,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:32,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:32,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:10:32,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:34,814 INFO L124 PetriNetUnfolderBase]: 13241/18275 cut-off events. [2024-06-21 21:10:34,814 INFO L125 PetriNetUnfolderBase]: For 18925/18925 co-relation queries the response was YES. [2024-06-21 21:10:34,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50590 conditions, 18275 events. 13241/18275 cut-off events. For 18925/18925 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99878 event pairs, 6594 based on Foata normal form. 8/18100 useless extension candidates. Maximal degree in co-relation 50574. Up to 17746 conditions per place. [2024-06-21 21:10:34,914 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-21 21:10:34,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 602 flow [2024-06-21 21:10:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:10:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:10:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-21 21:10:34,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498652291105122 [2024-06-21 21:10:34,916 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 204 transitions. [2024-06-21 21:10:34,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 602 flow [2024-06-21 21:10:34,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 563 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:10:34,922 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-21 21:10:34,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-21 21:10:34,922 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-21 21:10:34,922 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-21 21:10:34,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:34,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:34,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:34,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:10:34,923 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:34,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash 675725916, now seen corresponding path program 1 times [2024-06-21 21:10:34,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:34,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881825727] [2024-06-21 21:10:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:34,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:35,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:35,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881825727] [2024-06-21 21:10:35,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881825727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:35,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:35,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:10:35,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6651861] [2024-06-21 21:10:35,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:10:35,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:35,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:10:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:10:35,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:10:35,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:35,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:35,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:10:35,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:37,161 INFO L124 PetriNetUnfolderBase]: 13223/18251 cut-off events. [2024-06-21 21:10:37,161 INFO L125 PetriNetUnfolderBase]: For 29462/29462 co-relation queries the response was YES. [2024-06-21 21:10:37,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54082 conditions, 18251 events. 13223/18251 cut-off events. For 29462/29462 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100195 event pairs, 7013 based on Foata normal form. 6/18074 useless extension candidates. Maximal degree in co-relation 54064. Up to 17797 conditions per place. [2024-06-21 21:10:37,259 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 67 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-21 21:10:37,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 517 flow [2024-06-21 21:10:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:10:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:10:37,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-21 21:10:37,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-21 21:10:37,261 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 125 transitions. [2024-06-21 21:10:37,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 517 flow [2024-06-21 21:10:37,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 463 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 21:10:37,267 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-21 21:10:37,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-21 21:10:37,268 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-21 21:10:37,268 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-21 21:10:37,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:37,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:37,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:37,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:10:37,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:37,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 826868091, now seen corresponding path program 1 times [2024-06-21 21:10:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:37,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805358034] [2024-06-21 21:10:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:37,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:38,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:38,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805358034] [2024-06-21 21:10:38,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805358034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:38,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:38,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:10:38,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492238089] [2024-06-21 21:10:38,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:38,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:10:38,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:38,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:10:38,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:10:38,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:10:38,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:38,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:38,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:10:38,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:39,768 INFO L124 PetriNetUnfolderBase]: 13298/18348 cut-off events. [2024-06-21 21:10:39,768 INFO L125 PetriNetUnfolderBase]: For 41588/41588 co-relation queries the response was YES. [2024-06-21 21:10:39,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58671 conditions, 18348 events. 13298/18348 cut-off events. For 41588/41588 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100228 event pairs, 6689 based on Foata normal form. 6/18169 useless extension candidates. Maximal degree in co-relation 58651. Up to 17824 conditions per place. [2024-06-21 21:10:39,900 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2024-06-21 21:10:39,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 717 flow [2024-06-21 21:10:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:10:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:10:39,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 21:10:39,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-21 21:10:39,902 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 157 transitions. [2024-06-21 21:10:39,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 717 flow [2024-06-21 21:10:39,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 663 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 21:10:39,911 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 424 flow [2024-06-21 21:10:39,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-06-21 21:10:39,912 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-06-21 21:10:39,912 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 424 flow [2024-06-21 21:10:39,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:39,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:39,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:39,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:10:39,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:39,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 274964813, now seen corresponding path program 2 times [2024-06-21 21:10:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:39,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316357796] [2024-06-21 21:10:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:40,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316357796] [2024-06-21 21:10:40,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316357796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:40,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:40,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:10:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676056937] [2024-06-21 21:10:40,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:40,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:10:40,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:10:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:10:40,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:10:40,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:40,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:40,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:10:40,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:42,455 INFO L124 PetriNetUnfolderBase]: 13280/18329 cut-off events. [2024-06-21 21:10:42,455 INFO L125 PetriNetUnfolderBase]: For 57835/57835 co-relation queries the response was YES. [2024-06-21 21:10:42,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63892 conditions, 18329 events. 13280/18329 cut-off events. For 57835/57835 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100417 event pairs, 6822 based on Foata normal form. 6/18152 useless extension candidates. Maximal degree in co-relation 63870. Up to 17860 conditions per place. [2024-06-21 21:10:42,579 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-21 21:10:42,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 682 flow [2024-06-21 21:10:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:10:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:10:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 21:10:42,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-21 21:10:42,580 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 424 flow. Second operand 6 states and 148 transitions. [2024-06-21 21:10:42,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 682 flow [2024-06-21 21:10:42,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 636 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 21:10:42,609 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 417 flow [2024-06-21 21:10:42,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=417, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-21 21:10:42,610 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-21 21:10:42,610 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 417 flow [2024-06-21 21:10:42,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:42,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:42,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:42,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:10:42,611 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:42,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash -137011663, now seen corresponding path program 1 times [2024-06-21 21:10:42,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:42,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404230078] [2024-06-21 21:10:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:42,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:43,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404230078] [2024-06-21 21:10:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404230078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:43,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:43,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:10:43,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921277440] [2024-06-21 21:10:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:43,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:10:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:10:43,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:10:43,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:10:43,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 417 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:43,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:43,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:10:43,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:45,376 INFO L124 PetriNetUnfolderBase]: 13324/18389 cut-off events. [2024-06-21 21:10:45,376 INFO L125 PetriNetUnfolderBase]: For 65999/65999 co-relation queries the response was YES. [2024-06-21 21:10:45,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64809 conditions, 18389 events. 13324/18389 cut-off events. For 65999/65999 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100630 event pairs, 6716 based on Foata normal form. 6/18212 useless extension candidates. Maximal degree in co-relation 64784. Up to 17893 conditions per place. [2024-06-21 21:10:45,513 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 95 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-21 21:10:45,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 781 flow [2024-06-21 21:10:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:10:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:10:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 21:10:45,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-21 21:10:45,514 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 417 flow. Second operand 7 states and 177 transitions. [2024-06-21 21:10:45,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 781 flow [2024-06-21 21:10:45,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 734 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:45,539 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 463 flow [2024-06-21 21:10:45,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=463, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-21 21:10:45,540 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-21 21:10:45,540 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 463 flow [2024-06-21 21:10:45,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:45,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:45,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:45,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:10:45,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:45,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:45,541 INFO L85 PathProgramCache]: Analyzing trace with hash -136891693, now seen corresponding path program 2 times [2024-06-21 21:10:45,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:45,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161644277] [2024-06-21 21:10:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:45,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:46,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:46,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161644277] [2024-06-21 21:10:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161644277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:46,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:46,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:10:46,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084519427] [2024-06-21 21:10:46,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:46,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:10:46,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:10:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:10:46,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:10:46,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 463 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:46,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:46,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:10:46,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:48,275 INFO L124 PetriNetUnfolderBase]: 13399/18486 cut-off events. [2024-06-21 21:10:48,276 INFO L125 PetriNetUnfolderBase]: For 84811/84811 co-relation queries the response was YES. [2024-06-21 21:10:48,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69653 conditions, 18486 events. 13399/18486 cut-off events. For 84811/84811 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 101296 event pairs, 6447 based on Foata normal form. 6/18307 useless extension candidates. Maximal degree in co-relation 69629. Up to 17835 conditions per place. [2024-06-21 21:10:48,391 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 88 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2024-06-21 21:10:48,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 955 flow [2024-06-21 21:10:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:10:48,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:10:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 21:10:48,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-21 21:10:48,392 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 463 flow. Second operand 7 states and 183 transitions. [2024-06-21 21:10:48,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 955 flow [2024-06-21 21:10:48,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 894 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 21:10:48,418 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 583 flow [2024-06-21 21:10:48,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=583, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-06-21 21:10:48,419 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-21 21:10:48,419 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 583 flow [2024-06-21 21:10:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:48,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:48,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:48,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:10:48,420 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:48,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:48,420 INFO L85 PathProgramCache]: Analyzing trace with hash -128967183, now seen corresponding path program 3 times [2024-06-21 21:10:48,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:48,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908199006] [2024-06-21 21:10:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:48,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:49,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:49,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908199006] [2024-06-21 21:10:49,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908199006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:49,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:49,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:10:49,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750706210] [2024-06-21 21:10:49,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:49,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:10:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:10:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:10:49,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:10:49,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 583 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:49,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:49,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:10:49,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:51,041 INFO L124 PetriNetUnfolderBase]: 13381/18467 cut-off events. [2024-06-21 21:10:51,042 INFO L125 PetriNetUnfolderBase]: For 108174/108174 co-relation queries the response was YES. [2024-06-21 21:10:51,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73858 conditions, 18467 events. 13381/18467 cut-off events. For 108174/108174 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 101111 event pairs, 6723 based on Foata normal form. 6/18290 useless extension candidates. Maximal degree in co-relation 73833. Up to 17960 conditions per place. [2024-06-21 21:10:51,151 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 98 selfloop transitions, 18 changer transitions 0/122 dead transitions. [2024-06-21 21:10:51,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 903 flow [2024-06-21 21:10:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:10:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:10:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 21:10:51,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-21 21:10:51,153 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 583 flow. Second operand 7 states and 172 transitions. [2024-06-21 21:10:51,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 903 flow [2024-06-21 21:10:51,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 819 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 21:10:51,201 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 546 flow [2024-06-21 21:10:51,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-06-21 21:10:51,203 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-21 21:10:51,203 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 546 flow [2024-06-21 21:10:51,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:51,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:51,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:10:51,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:51,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 40486091, now seen corresponding path program 1 times [2024-06-21 21:10:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786473947] [2024-06-21 21:10:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:52,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:52,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786473947] [2024-06-21 21:10:52,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786473947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:52,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:52,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:10:52,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924124500] [2024-06-21 21:10:52,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:52,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:10:52,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:52,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:10:52,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:10:52,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:10:52,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 546 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:52,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:52,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:10:52,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:55,106 INFO L124 PetriNetUnfolderBase]: 16245/22118 cut-off events. [2024-06-21 21:10:55,107 INFO L125 PetriNetUnfolderBase]: For 142763/142763 co-relation queries the response was YES. [2024-06-21 21:10:55,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88600 conditions, 22118 events. 16245/22118 cut-off events. For 142763/142763 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 118420 event pairs, 8182 based on Foata normal form. 6/21990 useless extension candidates. Maximal degree in co-relation 88573. Up to 21765 conditions per place. [2024-06-21 21:10:55,217 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 102 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2024-06-21 21:10:55,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 961 flow [2024-06-21 21:10:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:10:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:10:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-21 21:10:55,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41745283018867924 [2024-06-21 21:10:55,218 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 546 flow. Second operand 8 states and 177 transitions. [2024-06-21 21:10:55,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 961 flow [2024-06-21 21:10:55,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 129 transitions, 892 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:55,254 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 636 flow [2024-06-21 21:10:55,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-21 21:10:55,255 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-21 21:10:55,255 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 636 flow [2024-06-21 21:10:55,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:55,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:55,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:55,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:10:55,255 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:55,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash -827292957, now seen corresponding path program 1 times [2024-06-21 21:10:55,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:55,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775290304] [2024-06-21 21:10:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:55,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:55,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:55,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775290304] [2024-06-21 21:10:55,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775290304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:55,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:55,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:10:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322944438] [2024-06-21 21:10:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:55,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:10:55,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:55,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:10:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:10:55,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:10:55,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 636 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:55,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:55,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:10:55,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:58,120 INFO L124 PetriNetUnfolderBase]: 15376/21382 cut-off events. [2024-06-21 21:10:58,120 INFO L125 PetriNetUnfolderBase]: For 166047/166053 co-relation queries the response was YES. [2024-06-21 21:10:58,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90640 conditions, 21382 events. 15376/21382 cut-off events. For 166047/166053 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 119015 event pairs, 8277 based on Foata normal form. 8/21135 useless extension candidates. Maximal degree in co-relation 90610. Up to 20778 conditions per place. [2024-06-21 21:10:58,278 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 95 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2024-06-21 21:10:58,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 922 flow [2024-06-21 21:10:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:10:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:10:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 21:10:58,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-21 21:10:58,280 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 636 flow. Second operand 5 states and 120 transitions. [2024-06-21 21:10:58,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 922 flow [2024-06-21 21:10:58,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 115 transitions, 850 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 21:10:58,347 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 643 flow [2024-06-21 21:10:58,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=643, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-21 21:10:58,349 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-21 21:10:58,349 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 643 flow [2024-06-21 21:10:58,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:58,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:58,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:58,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:10:58,350 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:10:58,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2025239444, now seen corresponding path program 1 times [2024-06-21 21:10:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:58,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108388288] [2024-06-21 21:10:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:59,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:59,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108388288] [2024-06-21 21:10:59,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108388288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:59,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:59,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:10:59,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300760906] [2024-06-21 21:10:59,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:59,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:10:59,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:59,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:10:59,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:10:59,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:10:59,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 643 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:59,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:59,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:10:59,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:02,451 INFO L124 PetriNetUnfolderBase]: 16009/22023 cut-off events. [2024-06-21 21:11:02,451 INFO L125 PetriNetUnfolderBase]: For 194472/194472 co-relation queries the response was YES. [2024-06-21 21:11:02,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97483 conditions, 22023 events. 16009/22023 cut-off events. For 194472/194472 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 121932 event pairs, 7940 based on Foata normal form. 6/21830 useless extension candidates. Maximal degree in co-relation 97452. Up to 21382 conditions per place. [2024-06-21 21:11:02,592 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 131 selfloop transitions, 31 changer transitions 0/169 dead transitions. [2024-06-21 21:11:02,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 169 transitions, 1311 flow [2024-06-21 21:11:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 21:11:02,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863731656184486 [2024-06-21 21:11:02,594 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 643 flow. Second operand 9 states and 232 transitions. [2024-06-21 21:11:02,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 169 transitions, 1311 flow [2024-06-21 21:11:02,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 169 transitions, 1262 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 21:11:02,652 INFO L231 Difference]: Finished difference. Result has 93 places, 110 transitions, 787 flow [2024-06-21 21:11:02,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=787, PETRI_PLACES=93, PETRI_TRANSITIONS=110} [2024-06-21 21:11:02,652 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 37 predicate places. [2024-06-21 21:11:02,652 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 110 transitions, 787 flow [2024-06-21 21:11:02,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:02,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:02,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:02,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:11:02,653 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:02,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:02,654 INFO L85 PathProgramCache]: Analyzing trace with hash 47607036, now seen corresponding path program 2 times [2024-06-21 21:11:02,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:02,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967605901] [2024-06-21 21:11:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:02,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:03,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967605901] [2024-06-21 21:11:03,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967605901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:03,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:03,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:11:03,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297221617] [2024-06-21 21:11:03,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:03,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:11:03,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:03,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:11:03,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:11:04,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:11:04,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 110 transitions, 787 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:04,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:04,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:11:04,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:06,494 INFO L124 PetriNetUnfolderBase]: 15991/22039 cut-off events. [2024-06-21 21:11:06,494 INFO L125 PetriNetUnfolderBase]: For 230407/230407 co-relation queries the response was YES. [2024-06-21 21:11:06,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102382 conditions, 22039 events. 15991/22039 cut-off events. For 230407/230407 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 122238 event pairs, 7947 based on Foata normal form. 6/21826 useless extension candidates. Maximal degree in co-relation 102350. Up to 21418 conditions per place. [2024-06-21 21:11:06,632 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 125 selfloop transitions, 23 changer transitions 0/155 dead transitions. [2024-06-21 21:11:06,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 155 transitions, 1207 flow [2024-06-21 21:11:06,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:11:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:11:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 21:11:06,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740566037735849 [2024-06-21 21:11:06,634 INFO L175 Difference]: Start difference. First operand has 93 places, 110 transitions, 787 flow. Second operand 8 states and 201 transitions. [2024-06-21 21:11:06,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 155 transitions, 1207 flow [2024-06-21 21:11:06,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 155 transitions, 1093 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 21:11:06,728 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 730 flow [2024-06-21 21:11:06,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=730, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-21 21:11:06,729 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-21 21:11:06,729 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 730 flow [2024-06-21 21:11:06,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:06,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:06,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:06,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:11:06,730 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:06,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:06,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1619470288, now seen corresponding path program 3 times [2024-06-21 21:11:06,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:06,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421930129] [2024-06-21 21:11:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:06,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:07,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421930129] [2024-06-21 21:11:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421930129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:07,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:07,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:11:07,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657834875] [2024-06-21 21:11:07,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:07,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:11:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:11:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:11:08,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:11:08,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 730 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:08,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:08,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:11:08,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:10,299 INFO L124 PetriNetUnfolderBase]: 16035/22094 cut-off events. [2024-06-21 21:11:10,299 INFO L125 PetriNetUnfolderBase]: For 253229/253229 co-relation queries the response was YES. [2024-06-21 21:11:10,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104261 conditions, 22094 events. 16035/22094 cut-off events. For 253229/253229 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 122655 event pairs, 7656 based on Foata normal form. 6/21877 useless extension candidates. Maximal degree in co-relation 104227. Up to 21319 conditions per place. [2024-06-21 21:11:10,488 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 108 selfloop transitions, 43 changer transitions 0/158 dead transitions. [2024-06-21 21:11:10,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 158 transitions, 1218 flow [2024-06-21 21:11:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:11:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:11:10,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 21:11:10,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-21 21:11:10,490 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 730 flow. Second operand 8 states and 204 transitions. [2024-06-21 21:11:10,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 158 transitions, 1218 flow [2024-06-21 21:11:10,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 158 transitions, 1161 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:11:10,625 INFO L231 Difference]: Finished difference. Result has 97 places, 114 transitions, 842 flow [2024-06-21 21:11:10,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=842, PETRI_PLACES=97, PETRI_TRANSITIONS=114} [2024-06-21 21:11:10,626 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-21 21:11:10,626 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 114 transitions, 842 flow [2024-06-21 21:11:10,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:10,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:10,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:10,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:11:10,627 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 21:11:10,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash 296985916, now seen corresponding path program 4 times [2024-06-21 21:11:10,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:10,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772931750] [2024-06-21 21:11:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:10,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:12,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:12,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772931750] [2024-06-21 21:11:12,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772931750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:12,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:12,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:11:12,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305209241] [2024-06-21 21:11:12,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:12,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:11:12,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:11:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:11:12,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:11:12,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 114 transitions, 842 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:12,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:12,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:11:12,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:14,676 INFO L124 PetriNetUnfolderBase]: 16048/22077 cut-off events. [2024-06-21 21:11:14,676 INFO L125 PetriNetUnfolderBase]: For 291064/291064 co-relation queries the response was YES. [2024-06-21 21:11:14,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109382 conditions, 22077 events. 16048/22077 cut-off events. For 291064/291064 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 122033 event pairs, 7954 based on Foata normal form. 6/21884 useless extension candidates. Maximal degree in co-relation 109347. Up to 21477 conditions per place. [2024-06-21 21:11:14,833 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 125 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-06-21 21:11:14,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 1324 flow [2024-06-21 21:11:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:11:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:11:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 21:11:14,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-21 21:11:14,837 INFO L175 Difference]: Start difference. First operand has 97 places, 114 transitions, 842 flow. Second operand 8 states and 196 transitions. [2024-06-21 21:11:14,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 1324 flow [2024-06-21 21:11:14,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 158 transitions, 1187 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:11:14,957 INFO L231 Difference]: Finished difference. Result has 99 places, 118 transitions, 848 flow [2024-06-21 21:11:14,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=848, PETRI_PLACES=99, PETRI_TRANSITIONS=118} [2024-06-21 21:11:14,957 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-21 21:11:14,957 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 118 transitions, 848 flow [2024-06-21 21:11:14,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:14,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:14,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:14,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:11:14,958 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:14,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:14,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1255060442, now seen corresponding path program 1 times [2024-06-21 21:11:14,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:14,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233556926] [2024-06-21 21:11:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:14,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:16,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:16,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233556926] [2024-06-21 21:11:16,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233556926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:16,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:16,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:11:16,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474223702] [2024-06-21 21:11:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:16,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:11:16,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:16,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:11:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:11:16,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:16,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 118 transitions, 848 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:16,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:16,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:16,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:19,050 INFO L124 PetriNetUnfolderBase]: 16475/22603 cut-off events. [2024-06-21 21:11:19,050 INFO L125 PetriNetUnfolderBase]: For 334708/334708 co-relation queries the response was YES. [2024-06-21 21:11:19,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116100 conditions, 22603 events. 16475/22603 cut-off events. For 334708/334708 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 121792 event pairs, 8160 based on Foata normal form. 3/22387 useless extension candidates. Maximal degree in co-relation 116064. Up to 22065 conditions per place. [2024-06-21 21:11:19,412 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 126 selfloop transitions, 26 changer transitions 0/157 dead transitions. [2024-06-21 21:11:19,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 157 transitions, 1341 flow [2024-06-21 21:11:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:11:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:11:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 21:11:19,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474393530997305 [2024-06-21 21:11:19,414 INFO L175 Difference]: Start difference. First operand has 99 places, 118 transitions, 848 flow. Second operand 7 states and 166 transitions. [2024-06-21 21:11:19,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 157 transitions, 1341 flow [2024-06-21 21:11:19,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 157 transitions, 1222 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 21:11:19,523 INFO L231 Difference]: Finished difference. Result has 100 places, 126 transitions, 920 flow [2024-06-21 21:11:19,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=920, PETRI_PLACES=100, PETRI_TRANSITIONS=126} [2024-06-21 21:11:19,523 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-21 21:11:19,523 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 126 transitions, 920 flow [2024-06-21 21:11:19,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:19,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:19,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:19,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:11:19,524 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 21:11:19,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:19,525 INFO L85 PathProgramCache]: Analyzing trace with hash 145172813, now seen corresponding path program 1 times [2024-06-21 21:11:19,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:19,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146182918] [2024-06-21 21:11:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:19,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:20,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146182918] [2024-06-21 21:11:20,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146182918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:20,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:20,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:11:20,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115406292] [2024-06-21 21:11:20,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:20,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:11:20,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:11:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:11:20,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:11:20,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 126 transitions, 920 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:20,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:20,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:11:20,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:22,930 INFO L124 PetriNetUnfolderBase]: 15796/21903 cut-off events. [2024-06-21 21:11:22,930 INFO L125 PetriNetUnfolderBase]: For 373702/373734 co-relation queries the response was YES. [2024-06-21 21:11:22,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117479 conditions, 21903 events. 15796/21903 cut-off events. For 373702/373734 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 120808 event pairs, 8064 based on Foata normal form. 12/21867 useless extension candidates. Maximal degree in co-relation 117442. Up to 21090 conditions per place. [2024-06-21 21:11:23,066 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 127 selfloop transitions, 23 changer transitions 0/161 dead transitions. [2024-06-21 21:11:23,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 161 transitions, 1478 flow [2024-06-21 21:11:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:11:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:11:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 21:11:23,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-21 21:11:23,067 INFO L175 Difference]: Start difference. First operand has 100 places, 126 transitions, 920 flow. Second operand 6 states and 148 transitions. [2024-06-21 21:11:23,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 161 transitions, 1478 flow [2024-06-21 21:11:23,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 161 transitions, 1384 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 21:11:23,177 INFO L231 Difference]: Finished difference. Result has 103 places, 140 transitions, 1055 flow [2024-06-21 21:11:23,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1055, PETRI_PLACES=103, PETRI_TRANSITIONS=140} [2024-06-21 21:11:23,178 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-21 21:11:23,178 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 140 transitions, 1055 flow [2024-06-21 21:11:23,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:23,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:23,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:23,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:11:23,179 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:23,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:23,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1472962480, now seen corresponding path program 1 times [2024-06-21 21:11:23,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:23,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13623237] [2024-06-21 21:11:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:23,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:24,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13623237] [2024-06-21 21:11:24,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13623237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:24,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:24,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:11:24,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777043991] [2024-06-21 21:11:24,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:24,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:11:24,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:24,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:11:24,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:11:24,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:11:24,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 140 transitions, 1055 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:24,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:24,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:11:24,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:27,992 INFO L124 PetriNetUnfolderBase]: 16596/23129 cut-off events. [2024-06-21 21:11:27,992 INFO L125 PetriNetUnfolderBase]: For 466479/466479 co-relation queries the response was YES. [2024-06-21 21:11:28,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131732 conditions, 23129 events. 16596/23129 cut-off events. For 466479/466479 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 131019 event pairs, 6562 based on Foata normal form. 24/23149 useless extension candidates. Maximal degree in co-relation 131692. Up to 21696 conditions per place. [2024-06-21 21:11:28,141 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 175 selfloop transitions, 37 changer transitions 0/219 dead transitions. [2024-06-21 21:11:28,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 219 transitions, 1953 flow [2024-06-21 21:11:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:28,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-21 21:11:28,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49245283018867925 [2024-06-21 21:11:28,143 INFO L175 Difference]: Start difference. First operand has 103 places, 140 transitions, 1055 flow. Second operand 10 states and 261 transitions. [2024-06-21 21:11:28,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 219 transitions, 1953 flow [2024-06-21 21:11:28,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 219 transitions, 1905 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-21 21:11:28,287 INFO L231 Difference]: Finished difference. Result has 112 places, 144 transitions, 1218 flow [2024-06-21 21:11:28,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1218, PETRI_PLACES=112, PETRI_TRANSITIONS=144} [2024-06-21 21:11:28,288 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-21 21:11:28,288 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 144 transitions, 1218 flow [2024-06-21 21:11:28,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:28,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:28,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:28,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:11:28,288 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:28,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:28,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1473022930, now seen corresponding path program 2 times [2024-06-21 21:11:28,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:28,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586708855] [2024-06-21 21:11:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:28,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:29,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:29,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586708855] [2024-06-21 21:11:29,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586708855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:29,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:29,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:11:29,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193878891] [2024-06-21 21:11:29,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:29,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:11:29,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:29,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:11:29,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:11:29,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:11:29,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 144 transitions, 1218 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:29,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:29,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:11:29,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:33,127 INFO L124 PetriNetUnfolderBase]: 16512/23009 cut-off events. [2024-06-21 21:11:33,127 INFO L125 PetriNetUnfolderBase]: For 507302/507302 co-relation queries the response was YES. [2024-06-21 21:11:33,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133555 conditions, 23009 events. 16512/23009 cut-off events. For 507302/507302 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 130263 event pairs, 7321 based on Foata normal form. 36/23041 useless extension candidates. Maximal degree in co-relation 133512. Up to 21854 conditions per place. [2024-06-21 21:11:33,292 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 172 selfloop transitions, 33 changer transitions 0/212 dead transitions. [2024-06-21 21:11:33,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 212 transitions, 1842 flow [2024-06-21 21:11:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-21 21:11:33,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-21 21:11:33,295 INFO L175 Difference]: Start difference. First operand has 112 places, 144 transitions, 1218 flow. Second operand 10 states and 254 transitions. [2024-06-21 21:11:33,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 212 transitions, 1842 flow [2024-06-21 21:11:33,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 212 transitions, 1765 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:11:33,574 INFO L231 Difference]: Finished difference. Result has 116 places, 144 transitions, 1220 flow [2024-06-21 21:11:33,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1220, PETRI_PLACES=116, PETRI_TRANSITIONS=144} [2024-06-21 21:11:33,574 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-21 21:11:33,574 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 144 transitions, 1220 flow [2024-06-21 21:11:33,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:33,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:33,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:33,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:11:33,575 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:33,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:33,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1591295308, now seen corresponding path program 1 times [2024-06-21 21:11:33,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:33,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888967952] [2024-06-21 21:11:33,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:33,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:35,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:35,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888967952] [2024-06-21 21:11:35,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888967952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:35,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:35,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:11:35,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939465125] [2024-06-21 21:11:35,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:35,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:11:35,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:35,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:11:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:11:35,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:35,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 144 transitions, 1220 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:35,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:35,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:35,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand